With Tissue Equivalent Material Patents (Class 378/18)
  • Patent number: 11112510
    Abstract: Disclosed herein is a radiation detector comprising: a scintillator configured to emit a second radiation upon receiving a first radiation from a pulsed radiation source, a plurality of pixels, and a controller; wherein each pixel is configured to detect the second radiation; wherein the pulsed radiation source is configured to emit the first radiation during a plurality of ON periods and configured not to emit the first radiation during a plurality of OFF periods; wherein the controller is configured to determine that the pulsed radiation source is at one of the ON periods or at one of the OFF periods; wherein the controller is configured to cause the pixels to integrate signals or not to integrate signals with determination that the radiation source is at one of the ON periods or at one of the OFF periods.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: September 7, 2021
    Assignee: SHENZHEN XPECTVISION TECHNOLOGY CO., LTD.
    Inventors: Peiyan Cao, Yurun Liu
  • Patent number: 11090871
    Abstract: A body phantom according to an embodiment includes a layered resin structure formed by combining a first material having a first refractive index and a second material having a second refractive index based on three-dimensional data that indicates an optical characteristic of a living body, wherein a mixing ratio of the second material to the first material to form the layered resin structure is a value corresponding to the optical characteristic.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: August 17, 2021
    Assignee: OLYMPUS CORPORATION
    Inventor: Kazunari Hanano
  • Patent number: 11029419
    Abstract: Disclosed herein is a radiation detector, comprising: a plurality of pixels, and a controller; wherein each pixel is configured to detect radiation emitted from a pulsed radiation source; wherein the pulsed radiation source is configured to emit radiation during a plurality of ON periods and configured not to emit radiation during a plurality of OFF periods; wherein the controller is configured to determine that the pulsed radiation source is at one of the ON periods or at one of the OFF periods; wherein the controller is configured to cause the pixels to integrate signals or not to integrate signals with determination that the radiation source is at one of the ON periods or at one of the OFF periods.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: June 8, 2021
    Assignee: SHENZHEN XPECTVISION TECHNOLOGY CO., LTD.
    Inventors: Peiyan Cao, Yurun Liu
  • Patent number: 10974074
    Abstract: A multi-purpose object for calibrating, monitoring and/or tracking a patient in a treatment system and/or a treatment planning system is described, the multi-purpose object being made of transparent material and defining an internal space having one or more targets, wherein an upper surface is coated so as to define a pattern of transparent markings. The interior of the multi-purpose object can be back lit to present a high contrast surface image for a patient treatment, tracking or monitoring system.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: April 13, 2021
    Assignee: VISION RT LIMITED
    Inventors: Gideon M. Hale, Benjamin James Waghorn
  • Patent number: 10960232
    Abstract: A radiation therapy system delivers radiation treatment over a 360-degree arc and performs a prepended imaging process, in a single pass, via an extended rotation gantry. While rotating the gantry in one direction about a bore of the radiation system, the radiation system generates multiple images of a target volume disposed in the bore using an imaging X-ray source mounted on the gantry. Then, while continuing to rotate the gantry in the same direction, the radiation system delivers a treatment beam to the target volume using a treatment-delivering X-ray source mounted on the gantry, where the treatment beam is delivered from some or all of a 360-degree arc about the bore. Thus, the prepended imaging process and the delivery of radiation are performed in a single pass of the gantry about a target volume, eliminating the need for a return stroke of the gantry for completion.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: March 30, 2021
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventors: Blake Gaderlund, Josh Star-Lack, John Van Heteren, Adam Wang
  • Patent number: 10948430
    Abstract: A method for determining a CT system parameter: controlling a mould body to move between an X-ray source and a detection surface of a detector, and acquiring X-ray projections of the mould body during movement on the detection surface, wherein the mould body has a first plane and a second plane perpendicular to each other, and the first plane and the second plane are always perpendicular to the detection surface during the movement of the mould body; determining a first straight line and a second straight line according to the acquired X-ray projections; and determining an intersection point of the first straight line and the second straight line as a pedal coordinate of a focus of the X-ray source on the detection surface, a CT coordinate system parameter including the coordinates of the foot of the perpendicular.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: March 16, 2021
    Inventors: Hao Yan, Wen Wang, Jinsheng Li
  • Patent number: 10898157
    Abstract: A lung motion phantom device and method of operation. The device has a body having an outer shell and a lung insert, a first actuator connected to a first drive linkage for driving a first displacement of an internal volume of the lung insert and an outer surface of the outer shell in a first direction, a second actuator connected to a second drive linkage for driving a second displacement of the internal volume of the lung insert and the outer surface of the outer shell in a second direction different than the first direction, and a controller programmed to control the first and second actuators such that the first and second displacements simulate movement of an external surface and an interior of a thoracic region of a patient.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: January 26, 2021
    Assignee: University of Maryland, Baltimore
    Inventors: Amit Sawant, Maida Ranjbar, Pouya Sabouri, Carlo Repetto
  • Patent number: 10827945
    Abstract: Virtually every cancer patient is imaged with CT, PET or MRI. Importantly, such imaging reveals that tumors are complex and heterogeneous, often containing multiple habitats within them. Disclosed herein are methods for analyzing these images to infer cellular and molecular structure in each of these habitats. The methods can involve spatially superimposing two or more radiological images of the tumor sufficient to define regional habitat variations in two or more ecological dynamics in the tumor, and comparing the habitat variations to one or more controls to predict the severity of the tumor.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 10, 2020
    Assignees: H. LEE. MOFFITT CANCER CENTER AND RESEARCH INSTITUTE, INC., UNIVERSITY OF SOUTH FLORIDA
    Inventors: Robert J. Gillies, Robert A. Gatenby, Natarajan Raghunand, John Arrington, Olya Stringfield, Yoganand Balagurunathan, Dmitry B. Goldgof, Lawrence O. Hall
  • Patent number: 10796607
    Abstract: Described is a dynamic phantom. The phantom comprises a body having a front, a back, and an internal cavity between the front and the back, the body having a movable chest wall. The phantom also comprises a first motion mechanism that is actuated to move the chest wall to thereby move the front relative to the back of the body. The phantom also comprises a moveable organ member supported within the internal cavity that is caused to move relative to the body by a second motion mechanism. The phantom also comprises a drive source for driving the first and second motion mechanisms, wherein the first and second motion mechanisms move the chest wall and the moveable organ member to substantially represent their movement in a human body.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: October 6, 2020
    Assignee: Inwentech
    Inventors: Chuan-Dong Wen, Benjamin Hill, Chau H. T. Nguyen, Helena S. Wen
  • Patent number: 10783641
    Abstract: The present invention relates to systems and methods for adaptively optimizing broadband reference spectra for a multi-spectral image or adaptively optimizing reference colors for a bright-field image. The methods and systems of the present invention involve optimization techniques that are based on structures detected in an unmixed channel of the image, and involves detecting and segmenting structures from a channel, updating a reference matrix with signals estimated from the structures, subsequently unmixing the image using the updated reference matrix, and iteratively repeating the process until an optimized reference matrix is achieved.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: September 22, 2020
    Assignee: Ventana Medical Systems, Inc.
    Inventors: Ting Chen, Srinivas Chukka, Anindya Sarkar
  • Patent number: 10779789
    Abstract: A beam hardening correction method, a related calibration method for tomographic image data and a related apparatus. The tomographic image data includes attenuation data (f) and phase gradient data (g) and/or small angle scattering data (h). A correction value is computed from the attenuation data (f) by applying a function (q) to the attenuation data (f). The correction value is combined (S445) with the phase gradient data (g) or with the small angle scattering data (h).
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: September 22, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Thomas Koehler, Bernhard Johannes Brendel
  • Patent number: 10779386
    Abstract: A guide device for at least one line, such as an electric line of a C-arm, has a rotatable first cylinder with a first cylindrical surface and a static second cylinder, adjoining the first cylinder in the axial direction and having a second cylindrical surface. A first guide element for guiding the line on the first and/or the second cylindrical surface, is disposed coaxially with respect to the first and the second cylinder and it is movable relative to the first and the second cylinder. The line can be wound up on the first and/or the second cylindrical surface or can be unwound therefrom depending on the movement of the first cylinder.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: September 15, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Andreas Limmer, Zsolt Pavel, Norbert Scherer, Friedrich Schirmer
  • Patent number: 10758202
    Abstract: The present invention is directed towards spectral imaging, wherein a dedicated spectral imaging phantom is scanned with a spectral x-ray device to obtain spectral imaging data of the spectral imaging phantom. Said imaging data of the spectral imaging phantom is used as input for obtaining improved further imaging data of a subject of which a spectral scan is performed subsequent to or simultaneous with the spectral scan of the spectral imaging phantom. Improved further imaging data may be obtained by using the spectral phantom imaging data as input for imaging data correction, for providing a recommendation and/or for further data processing.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: September 1, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Heiner Daerr, Thomas Koehler
  • Patent number: 10737120
    Abstract: Methods and devices for detecting consistency between an invisible radiation field and a visible light field are provided. In an example, the method includes: an invisible radiation field is obtained by controlling a size of an opening of a beam limiting device; a first projection image is captured by an Electron Portal Imaging Device (EPID) as a distribution map of the invisible radiation field; a visible light field is obtained by turning on a light field lamp without changing the size of the opening of the beam limiting device; a phantom is positioned at each of vertices of the visible light field; a second projection image is captured by the EPID as a vertex distribution map of the visible light field; and deviation information between the invisible radiation field and the visible light field is determined according to the distribution map of the invisible radiation field and the vertex distribution map of the visible light field.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: August 11, 2020
    Assignee: Shanghai Neusoft Medical Technology Co., Ltd.
    Inventors: Han Xu, Zhichao Jiang, Lin Zhang, Ming Li
  • Patent number: 10739492
    Abstract: Apparatuses are provided for evaluating an image quality of an image produced by an x-ray computed tomography (CT) system.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: August 11, 2020
    Assignee: Battelle Memorial Institute
    Inventors: Eric Atherton, Matthew Aderholdt, Joseph Regensbuger, Lucinda Flaherty, Joseph Cochran
  • Patent number: 10668304
    Abstract: A deformable radiotherapy phantom can be produced using an additive manufacturing process, based on a medical image of the patient. The deformable phantom can include dosimeters for measuring radiation dose distribution. A smart material can allow deformation in response to an applied stimulus. Among other things, the phantom can be used to validate radiation dose warping, a radiotherapy treatment plan, to determine a maximum acceptable deformation of the patient, to validate a cumulative accuracy of dose warping and deformable image registration, or the like.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: June 2, 2020
    Assignee: Elekta, Inc.
    Inventors: Nicolette Patricia Magro, Xiao Han
  • Patent number: 10634797
    Abstract: A radiation exposure system having a beam source is provided. The system further includes a variable thickness degrader, positioned between the beam source and an object to be exposed, for providing varying degrees of degradation to a radiation beam emitted from the beam source onto the object. The system also includes a set of detectors, positioned between the variable thickness degrader and the object, for receiving and measuring only a portion of the radiation beam remaining after the degradation of the radiation beam by the variable thickness degrader.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: April 28, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael S. Gordon, John G. Massey, Kenneth P. Rodbell
  • Patent number: 10585051
    Abstract: A method of making a gauge for verifying or calibrating an x-ray computed tomography device positions a first plurality of objects on a first substrate, and a second plurality of objects on a second substrate. The method also certifies the positions of both the first plurality of objects on the first substrate, and the second plurality of objects on the second substrate. After certifying both the first and second plurality of objects, the method couples the first substrate with the second substrate.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: March 10, 2020
    Assignee: Hexagon Metrology, Inc.
    Inventors: Jonathan J. O'Hare, Zhanyu Ge
  • Patent number: 10542952
    Abstract: A method is described for the determination of a calcium score for a patient to be examined with the aid of a CT system. The method is used to define patient-specific CT-acquisition parameters. In addition, material parameters for a model method for the generation of synthetic image data for virtual CT-acquisition parameters are calibrated using phantom image data recorded with reference CT-acquisition parameters. A calcium score assigned to synthetic phantom image data corresponds to a calcium score determined with phantom image data recorded with reference CT-acquisition parameters. Next, CT-projection-measurement data is acquired for a region of interest using the patient-specific CT-acquisition parameters. The acquired CT-projection-measurement data is used to generate synthetic image data using the calibrated model method. Finally, a calcium score is determined using a standard method on the basis of the synthetic image data. Also described is a calcium-score-determining device.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: January 28, 2020
    Assignee: SIEMENS HEALTHCARE GMBH
    Inventors: Thomas Allmendinger, Rainer Raupach
  • Patent number: 10540766
    Abstract: A computerized tomography artifact correction method includes: receiving scanning data; reconstructing an image to be corrected and a reference image of the image to be corrected based on the scanning data; determining proportions of a first substance for pixels of the reference image; obtaining a base image of the first substance based on the proportions of the first substance; performing a projection of the base image of the first substance and the reference image to obtain a plurality of projection lines; for each of the plurality of projection lines, obtaining an equivalent length of the first substance corresponding to the projection line and selecting a hardening correction coefficient based on the equivalent length of the first substance corresponding to the projection line; and performing an artifact correction on the image to be corrected based on the hardening correction coefficients.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: January 21, 2020
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventor: Jianwei Fu
  • Patent number: 10539515
    Abstract: Method and apparatus are provided for calibration or verification of accuracy specification of a computed tomographic system. In one embodiment, the apparatus can include a base structure, a first set of test objects arranged along a first axis and coupled to the base structure, and a second set of test objects arranged along a second axis and coupled to the base structure. The first set of test objects and the second set of test objects have a first geometry. The apparatus can also include a third set of test objects and a fourth set of test objects. The third set of test objects, and the fourth set of test objects have a second geometry different from the first geometry. Locations of the first, second third and fourth set of test objects are spatially fixed with respect to the base structure. The apparatus is a test specimen adapted for calibration or accuracy verification of computed tomography system.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: January 21, 2020
    Assignee: GE Inspection Technologies, LP
    Inventors: Andreas Fischer, Nils Rothe, Alexander Suppes, Eugen Trapet
  • Patent number: 10507004
    Abstract: The present invention relates to phantom device for a dark field imaging system. Although dark field imaging is known to be sensitive to changes in the micro-structure of the tissue of a human subject that may be caused during a disease progression, there may be a need to quantify information provided by an image of the human subject. A detector signal component representing the dark image may be altered by changes of the X-ray spectrum which passes tissue of the human subject comprising micro-structures. This may be caused due to an attenuation of the X-ray radiation previously provided by an X-ray source, wherein the attenuation may be caused by tissue of the human subject, which covers said micro-structure comprising tissue. In order to provide information in clinical practice regarding the influence of attenuation to the X-ray radiation before it passes the micro-structure issue of the human subject, the phantom device for dark field imaging is proposed.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: December 17, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Heiner Daerr, Thomas Koehler, Hanns-Ingo Maack
  • Patent number: 10492755
    Abstract: A calibration phantom has a surface having a reflectance calibration target with a pattern that is indicative of one or more spatial reference positions. Radio-opaque markers are disposed in the calibration phantom and are positionally correlated to the one or more spatial reference positions of the reflectance calibration target.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: December 3, 2019
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10448918
    Abstract: The invention concerns a thyroid phantom (1), the phantom comprising a body (2) comprising at least two parts (3, 4) defining between them an imprint (7) of a thyroid and means for attaching the two parts together in order to close the imprint in a sealed manner, the phantom further comprising means for filling the imprint with a solution, said filling means comprising at least one channel (19, 20) extending from the outside of the body into the imprint and means for temporarily symmetrically plugging said channel. The invention also concerns a method for producing such a thyroid phantom, a family comprising a plurality of such thyroid phantoms corresponding to different categories of human beings, an overall phantom comprising one such thyroid phantom as well as a family comprising a plurality of overall phantoms.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 22, 2019
    Assignee: INSTITUT DE RADIOPROTECTION ET DE SURETE NUCLEAIRE
    Inventors: David Broggio, Tiffany Beaumont
  • Patent number: 10441236
    Abstract: A coordinate system registration module, including radiopaque elements arranged in a fixed predetermined pattern and configured, in response to the radiopaque elements generating a fluoroscopic image, to define a position of the module in a fluoroscopic coordinate system of reference. The module further includes one or more connections configured to fixedly connect the module to a magnetic field transmission pad at a predetermined location and orientation with respect to the pad, so as to characterize the position of the registration module in a magnetic coordinate system of reference defined by the magnetic field transmission pad.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: October 15, 2019
    Assignee: BIOSENSE WEBSTER (ISRAEL) LTD.
    Inventors: Meir Bar-Tal, Tamir Demri, Tal Haim Bar-on, Eliahu Zino, Ran Glazer, Gil Zigelman, Dror Berman
  • Patent number: 10438348
    Abstract: Techniques are disclosed for estimating patient radiation exposure during computerized tomography (CT) scans. More specifically, embodiments of the invention provide efficient approaches for generating a suitable patient model used to make such an estimate, to approaches for estimating patient dose by interpolating the results of multiple simulations, and to approaches for a service provider to host a dose estimation service made available to multiple CT scan providers.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: October 8, 2019
    Assignee: BAYER HEALTHCARE LLC
    Inventors: Gregory Couch, James Couch
  • Patent number: 10433810
    Abstract: A system includes determination of a first sub-matrix of a projection matrix which describes a geometrical relationship between points of a three-dimensional coordinate system of the imaging system and points of a two-dimensional coordinate system of an image detector, determination of a second sub-matrix of the projection matrix, where the first and second sub-matrixes comprise a decomposition of the projection matrix, conversion of a first point of the two-dimensional coordinate system to a first point of the three-dimensional coordinate system based on the first and second sub-matrixes, determination of an updated first sub-matrix of an updated projection matrix, where the updated projection matrix describes a second geometrical relationship between points of the three-dimensional coordinate system and points of the two-dimensional coordinate system, and conversion of a second point of the two-dimensional coordinate system to a second point of the three-dimensional coordinate system based on the updated fi
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: October 8, 2019
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Cheng Ni, Johannes Stahl, Supratik Bose, Jonathan Maltz
  • Patent number: 10426418
    Abstract: One aspect of the invention provides a phantom including a confined fluidic path defining a plurality of regions of monotonically decreasing, discrete cross-sectional dimensions with respect to an imaging plane. Another aspect of the invention provides a method of assessing imaging. The method includes: placing a phantom as described herein within an imaging system; flowing one or more fluids through the phantom; and capturing one or more images of the phantom. Another aspect of the invention provides a kit for assessing imaging. The kit includes a phantom as described herein and instructions for use.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: October 1, 2019
    Assignee: Baylor College of Medicine
    Inventors: Goetz Benndorf, James Ryan Mason
  • Patent number: 10398405
    Abstract: Among other things, one or more techniques and/or systems for calibration of a radiation system to compute a gain correction(s) are provided. A calibration procedure is performed during which a portion of the detector array is shadowed by an object, causing the detector array to be non-uniformly exposed to radiation. A portion of a projection generated from the calibration procedure and indicative of radiation that did not traverse the object is separated from a portion of the projection indicative of radiation that did traverse the object, and a gain correction(s) is computed from the portion of the projection indicative of radiation that did not traverse the object (e.g., and is thus indicative of radiation that merely traversed air).
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: September 3, 2019
    Assignee: Analogic Corporation
    Inventors: David Rozas, Aleksander Roshi, Charles H. Shaughnessy
  • Patent number: 10395371
    Abstract: The present invention relates to systems and methods for adaptively optimizing broadband reference spectra for a multi-spectral image or adaptively optimizing reference colors for a bright-field image. The methods and systems of the present invention involve optimization techniques that are based on structures detected in an unmixed channel of the image, and involves detecting and segmenting structures from a channel, updating a reference matrix with signals estimated from the structures, subsequently unmixing the image using the updated reference matrix, and iteratively repeating the process until an optimized reference matrix is achieved.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: August 27, 2019
    Assignee: Ventana Medical Systems, Inc.
    Inventors: Ting Chen, Srinivas Chukka, Anindya Sarkar
  • Patent number: 10307075
    Abstract: The present invention relates to an external standard reference system of a type inserted into the coil of a human magnetic resonance imaging equipment, and more specifically, to a system capable of analyzing metabolic components (quantity of metabolites) in a human body without an error and a limited range using an external standard reference analysis method, in order to enhance accuracy of diagnosis by utilizing magnetic resonance spectroscopy of the human magnetic resonance imaging equipment. A system for evaluating performance of magnetic resonance spectroscopy includes an outer container for inserting an RF coil and provided with a plurality of holes; a plurality of inner containers arranged to be inserted into the plurality of holes respectively and capable of being filled with metabolites different from each other in at least a type or a concentration; and a frame for fixing a head of an object arranged inside the outer container.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: June 4, 2019
    Assignee: The Catholic University of Korea Industry-Academic Cooperation Foundation
    Inventors: Bo-Young Choe, Kyu-Ho Song, Do-Wan Lee
  • Patent number: 10231683
    Abstract: A breast imaging apparatus includes a gantry which includes a radiation generation unit configured to generate radiation and a radiation detection unit configured to detect radiation generated by the radiation generation unit, the radiation generation unit and the radiation detection unit being capable of rotating facing each other, wherein the gantry is provided with a front cover configured to protect a subject from the radiation generation unit and the radiation detection unit which rotate during CT imaging, and the front cover has an opening in which the breast of the subject is inserted, and a breast holding portion configured to hold the breast of the subject inserted in the opening.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: March 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuo Shimada, Osamu Tsujii, Hiroshi Komatsu, Sakiko Yamaguchi, Nobuhiro Takeuchi, Takahiro Noguchi, Hitomi Ogasawara, Chifuyu Inagaki, Yoshinori Hirano
  • Patent number: 10217251
    Abstract: A method for image reconstruction is disclosed, based upon a first plurality of spectral raw data sets. The method includes forming a second plurality of virtual raw data sets; reconstructing an auxiliary image data set on the basis of a virtual raw data set. A first material is selected from a material group which comprises a plurality of materials. Material-specific maps are generated for a number of second materials of the material group. A determination of material line integrals take place, for the second materials with forward projection of the respective material-specific map. Subsequently, synthetic projection data sets are determined for each material. Finally, a reconstruction of at least one image data set takes place on the basis of the synthetic projection data sets for a number of materials of the material group. An image reconstruction device and a computed tomography system are also disclosed.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: February 26, 2019
    Assignee: SIEMENS HEALTHCARE GMBH
    Inventors: Bernhard Krauss, Rainer Raupach
  • Patent number: 10197451
    Abstract: In a system having a thermal backdrop (106) and a thermal illuminator (102), the thermal backdrop includes a body having a top face; a contrast phantom (114) positioned above the top face and aligned substantially parallel with the top face; and a reflective layer (112) located between the body and the contrast phantom and aligned substantially parallel with the top face. The thermal illuminator radiates thermal energy (104) in a first direction towards the contrast phantom; wherein the first direction is aligned with the top face such that when the thermal energy is radiated in the first direction a first portion of the thermal energy is absorbed by the contrast phantom and a second portion (116) is reflected by the reflective layer towards a millimeter-wave camera (118) in a second direction. Furthermore, the contrast phantom has a plurality of different portions (114A, 114B, 114C, 114D), each portion having a different respective thickness along the first direction.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: February 5, 2019
    Assignee: Battelle Memorial Institute
    Inventors: James C. Weatherall, Jeffrey B. Barber
  • Patent number: 10181391
    Abstract: The disclosure relates to systems and method for processing images. The method includes selecting a predetermined reference structure, the predetermined reference structure having a known feature size/shape. The method also includes obtaining a reference image of the predetermined reference structure, and capturing a calibration image of the predetermined reference structure using an observation device. The calibration image includes a plurality of features. Additionally, the method includes identifying at least one portion of the plurality of features of the calibration image that include a feature size/shape substantially similar to the known feature size and shape of the predetermined reference structure. Finally, the method includes combining the identified portion of the plurality of features of the calibration image to form a stacked feature image, and determining a point spread function (PSF) of the observation device by comparing the obtained reference image with the stacked feature image.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: January 15, 2019
    Assignee: Nanojehm Inc.
    Inventors: Matthew Daniel Zotta, Eric Lifshin
  • Patent number: 10145809
    Abstract: The invention provides a sensitivity correction coefficient calculating system for an X-ray detector with which the sensitivity correction coefficient can be calculated using a multipurpose X-ray source instead of a specific X-ray source. In the sensitivity correction coefficient calculating system for an X-ray detector having a detection surface where detection elements for detection the X-ray intensity are aligned one-dimensionally or two-dimensionally, fitting is carried out on the measured X-ray intensity detected by a detection element using an approximation function so as to calculate the sensitivity correction coefficient using the calculated X-ray intensity calculated from the approximation function and the measured X-ray intensity.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: December 4, 2018
    Assignee: SHIMADZU CORPORATION
    Inventor: Takao Marui
  • Patent number: 10119922
    Abstract: A test pattern geometrically calibrates an x-ray imaging device to generate three-dimensional images of an object by reconstruction based on two-dimensional projections of the object, the calibrating test pattern comprising a volume support with markers having a radiological absorbance providing contrast to the volume support, the markers distributed in a three-dimensional pattern, in subsets substantially in parallel respective straight lines wherein sequences of cross-ratios are constructed from the respective subsets of markers. Each sequence of cross-ratios comprises a single cross-ratio for each quadruplet of markers in which quadruplet the markers are ordered depending on rank number of respective markers along the straight line they are aligned in a predefined first direction, the order being common to all cross-ratios.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: November 6, 2018
    Assignee: THALES
    Inventors: Guillaume Bernard, Albert Murienne
  • Patent number: 10092265
    Abstract: The present invention relates to a method for reconstructing a 3D image from 2D X-ray images acquired with an X-ray imaging system, said method comprising the steps of: a) receiving a set of 2D X-ray images of a region of a patient with said X-ray imaging system, b) computing an initial 3D image within the coordinate system of the X-ray imaging system by using at least part of said 2D X-ray images with their respective projective geometry data; c) projecting said initial 3D image on at least part of said 2D X-ray images and adjusting the respective projective geometry data of said images, said adjustment comprising registration of said images with the projection of the initial 3D image using an image-to-image registration technique; d) computing an updated 3D image using the complete set of 2D X-ray images with their respective adjusted projective geometry data.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: October 9, 2018
    Assignee: SURGIVISIO
    Inventors: Stephane Lavallee, Markus Fleute, Laurence Van Beek
  • Patent number: 10085709
    Abstract: The present invention relates to a method for reconstructing a 3D image from 2D X-ray images acquired with an X-ray imaging system, said method comprising the steps of: a) receiving a set of 2D X-ray images of a region of a patient with said X-ray imaging system, b) computing an initial 3D image within the coordinate system of the X-ray imaging system by using at least part of said 2D X-ray images with their respective projective geometry data; c) projecting said initial 3D image on at least part of said 2D X-ray images and adjusting the respective projective geometry data of said images, said adjustment comprising registration of said images with the projection of the initial 3D image using an image-to-image registration technique; d) computing an updated 3D image using the complete set of 2D X-ray images with their respective adjusted projective geometry data.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: October 2, 2018
    Assignee: SURGIVISIO
    Inventors: Stephane Lavallee, Markus Fleute, Laurence Van Beek
  • Patent number: 9955874
    Abstract: This invention provides a phantom whose light propagation characteristics and acoustic propagation characteristics are similar to those of human tissues and which allows detection of an absorber also with an ultrasonic wave diagnostic apparatus and allows adjustment of the oxygen saturation. A phantom has light absorbers 12a to 12d in a phantom base material 11, in which the light absorbers 12a to 12d approximate the light absorption coefficient ratio at two or more wavelengths to that of biological tissues, and the acoustic propagation characteristics of the phantom base material 11 and the light absorbers 12a to 12d are different from each other.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: May 1, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahiro Suita, Ryo Ogawa
  • Patent number: 9936935
    Abstract: A phantom assembly for testing x-ray equipment comprising a phantom assembly for testing x-ray equipment comprising at least one image plate made of at least one image plate material, at least one base member made of at least one base material, at least one step surface formed in the base member, and at least one mesh insert. The at least one base material is selected, sized, and dimensioned such that base member yields a transmitted reference signal in addition to at least one transmitted energy test spectrum associated with the at least one step surface. The at least one mesh insert is selected, sized, and dimensioned such that the at least one mesh insert yields a transmitted energy resolution signal.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: April 10, 2018
    Assignee: Nosil DSC Innovations, Inc.
    Inventor: Josip Nosil
  • Patent number: 9924920
    Abstract: A phantom for use in quality control of tomographic images, the phantom including a cylindrical plate made of a uniform material having a density d1, with two cylinders being inserted in the plate, the cylinders being made out of uniform materials having different densities d2, d3, the density of one of the cylinders being greater than the density d1 of the plate, and the density of the other cylinder being less than the density d1 of the plate, and including a first series of pairs of holes of different diameters drilled in the plate, the axes of the holes of the first series being oriented axially relative to an axis of revolution of the plate, and the holes in a given pair being spaced apart from each other by a distance equal to their diameter.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: March 27, 2018
    Assignees: SAFRAN, SAFRAN LANDING SYSTEMS, SAFRAN AIRCRAFT ENGINES
    Inventors: Lionel Christian Jean-Loïc Gay, Philippe Arslan, Yves Rambourg, André Chandelle
  • Patent number: 9839793
    Abstract: An irradiation apparatus radiates a particle beam after forming the beam for plural layers. A dose monitor measures a dose in real time. A dose evaluation unit evaluates an irradiation dose for each layer on the basis of a value measured by the dose monitor and a dose calibration factor set for each layer. An irradiation control section performs radiation control for each layer on the basis of an evaluation result of the dose evaluation unit. An interpolation value generation unit uses actual-measurement dose-calibration factors obtained by radiating a particle beam to a simulated phantom provided with a calibration dosimeter, to generate an interpolation estimation value of the dose calibration factor. For each layer subject to the interpolation value, and based on an irradiation condition of that layer, the interpolation value generation unit performs weighting on each of the actual-measurement dose-calibration factors.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: December 12, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hisashi Harada, Masahiro Ikeda, Osamu Takahashi, Nobuhiko Ina, Yuehu Pu, Takaaki Iwata
  • Patent number: 9779908
    Abstract: The present disclosure provides an X-ray generator with adjustable collimation. The X-ray generator comprises: an assembly of X-ray source, which includes an X-ray tube having a cathode and an anode and a front collimator; a high voltage generator, which is disposed in an extended chamber of a housing for the X-ray tube and which is used for supplying a direct current high voltage between the cathode and the anode of the X-ray tube to excite X-ray beams; a collimation adjustment unit, which is rotatably disposed outside of the front collimator and which is used for adjusting fan-type X-ray beams into continuous pencil-type X-ray beams; and a cooling unit, which is independently mounted to the X-ray tube and which is used for cooling the anode of the X-ray tube; wherein, the assembly of X-ray source, the high voltage generator, the collimation adjustment unit and the cooling unit are integrated as a whole.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: October 3, 2017
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Fuhua Ding, Zhiqiang Chen, Ziran Zhao, Wanlong Wu, Le Tang, Yingkang Jin, Yanjie Wen
  • Patent number: 9741104
    Abstract: An apparatus for image reconstruction is provided, including processing circuitry to obtain, from a scan of a region of interest of a patient, raw projection data of the region of interest; reconstruct the raw projection data to produce image data; apply high dynamic range tone-mapping to the image data to produce tone-mapped image data by applying window width and window level parameters to the image data to produce adjusted image data, and calculating a contrast adjustment based on both the image data and the adjusted image data; and quantize the tone-mapped image data to produce quantized tone-mapped image data for display.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: August 22, 2017
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Kurt Walter Schultz, Steven Reynolds
  • Patent number: 9693749
    Abstract: A system includes determination of a first sub-matrix of a projection matrix which describes a geometrical relationship between points of a three-dimensional coordinate system of the imaging system and points of a two-dimensional coordinate system of an image detector, determination of a second sub-matrix of the projection matrix, where the first and second sub-matrixes comprise a decomposition of the projection matrix, conversion of a first point of the two-dimensional coordinate system to a first point of the three-dimensional coordinate system based on the first and second sub-matrixes, determination of an updated first sub-matrix of an updated projection matrix, where the updated projection matrix describes a second geometrical relationship between points of the three-dimensional coordinate system and points of the two-dimensional coordinate system, and conversion of a second point of the two-dimensional coordinate system to a second point of the three-dimensional coordinate system based on the updated fi
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: July 4, 2017
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Cheng Ni, Johannes Stahl, Supratik Bose, Jonathan Maltz
  • Patent number: 9693750
    Abstract: An evaluation aid is used as a phantom (imitation lesion) when a digital X-ray dynamic image thereof is taken and evaluated for image qualities for X-ray absorption parts having different X-ray absorption ratios. The evaluation aid contains a fixed plate (plate-like body) including a plurality of regions having different X-ray absorption ratios; a rotating disk (movable body) having a plurality of wires (wire rods), the rotating disk capable of rotating (moving) with respect to the fixed plate so that the plurality of wires traverse X-ray with which the fixed plate is irradiated; and a driving motor (driving portion) which rotates (moves) the rotating disk with respect to the fixed plate. It is preferred that thicknesses and/or constituent materials of the plurality of regions of the fixed plate are different from each other, so that these regions have the different X-ray absorption ratios.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: July 4, 2017
    Assignees: NATIONAL UNIVERSITY CORPORATION, TOHOKU UNIVERSITY, MITAYA MANFACTUING CO., LTD.
    Inventors: Koichi Chida, Yuji Kaga, Goro Yokouchi
  • Patent number: 9683948
    Abstract: Systems and methods for iterative multi-material correction are provided. A system includes an imager that acquires projection data of an object. A reconstructor reconstructs the acquired projection data into a reconstructed image, utilizes the reconstructed image to perform a multi-material correction on the acquired projection data to generate a multi-material corrected reconstructed image, and utilizes the multi-material corrected reconstructed image to perform one or more iterations of the multi-material correction on the projection data to generate an iteratively corrected multi-material corrected image.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: June 20, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Hewei Gao, Girijesh K. Yadava, Adam Israel Cohen, Brian Edward Nett
  • Patent number: 9681851
    Abstract: Evaluating dose performance of a radiographic imaging system with respect to image quality using a phantom, a channelized hotelling observer module as a model observer, and a printer, a plaque, or an electronic display includes scanning and producing images for a plurality of sections of the phantom using the radiographic imaging system, wherein the plurality of sections represent a range of patient sizes and doses and wherein the sections of the phantom contain objects of measurable detectability. Also included is analyzing the images to determine detectability results for one or more of the contained objects within the images of the plurality of sections of the phantom, wherein the analyzing includes using a channelized hotelling observer (CHO) module as a model observer; and displaying, via the printer, the plaque, or the electronic display, a continuous detectability performance measurement function using the determined detectability results.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: June 20, 2017
    Assignee: TIP Imaging, LLC
    Inventors: David P. Rohler, Thomas L. Toth, Steven H. Izen, Arjun K. Maniyedath
  • Patent number: 9675313
    Abstract: A method for densitometric analysis of a computed tomography image is provided. The method includes converting CT numbers of each pixel of a cross-sectional computed tomography image of the brain into Hounsfield unit (HU) values; eliminating an artifact from the computed tomography image of which the CT numbers of each pixel have been converted into the HU values, and extracting the brain tissues; and extracting a density distribution of the HU values from the computed tomography image, in which the artifact has been removed and the brain tissues have been extracted.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: June 13, 2017
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventor: Dong-Joo Kim