Beam Energy Or Intensity Control Patents (Class 378/16)
  • Patent number: 11096642
    Abstract: Various methods and systems are provided for x-ray tube conditioning for a computed tomography imaging method. In one embodiment, a scout scan may be carried out prior to a diagnostic to warmup the x-ray tube to a desired temperature for the diagnostic scan. A scout scan parameter optimizing algorithm may be used to determine scout scan parameters based on a selected patient absorbed dose range and an amount of energy to be imparted to an x-ray tube during the scout scan preceding a diagnostic scan. By using a hardening filter in the path of the x-ray beam, radiation absorbed dose of the subject being scanned may be limited to the selected patient absorbed dose range.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: August 24, 2021
    Assignee: GE PRECISION HEALTHCARE LLC
    Inventors: Dominic Joseph Crotty, Jean-Baptiste Thibault
  • Patent number: 11017068
    Abstract: Devices and optical sensor modules are provided for provide on-screen optical sensing of fingerprints by using an under-screen optical sensor module that captures and detects returned light that is emitted by the display screen for displaying images and that is reflected back by the top surface of the screen assembly. Optical collimators are provided in the under-screen optical sensor module to enhance the optical imaging performance. Techniques for reducing the environmental light in the optical sensing are provided.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: May 25, 2021
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventors: Yi He, Bo Pi
  • Patent number: 10893839
    Abstract: A computed tomography (CT) imaging system and method, wherein the system includes an x-ray source that is operable to emit a beam of x-rays from a focal spot and move a spot position of the focal spot. The system also includes a detector assembly that is configured to detect the x-rays attenuated by the object. At least one processing unit is configured to execute programmed instructions stored in memory. The at least one processing unit is configured to direct the x-ray source to emit different beams of the x-rays at different energy levels and to receive data from the detector assembly that are representative of detection of the x-rays emitted at the different energy levels. The at least one processing unit is also configured to direct the x-ray source to move the focal spot such that the focal spot is at different spot positions while the different beams are emitted.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: January 19, 2021
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Yannan Jin, Ming Yan, Uwe Wiedmann
  • Patent number: 10806418
    Abstract: According to one embodiment, an X-ray CT apparatus includes processing circuitry. The processing circuitry acquires a plurality of discrete images at a corresponding plurality of discrete positions in a body axis direction of an object, and calculates imaging conditions corresponding to a scan range of a main scan based on the plurality of discrete images.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: October 20, 2020
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hiroshi Hirayama, Sanae Harada, Toyomasa Honda
  • Patent number: 10765890
    Abstract: A method may include obtaining first image data relating to a region of interest (ROI) of a first subject. The first image data corresponding to a first equivalent dose level may be acquired by a first device. The method may also include obtaining a model for denoising relating to the first image data and determining second image data corresponding to an equivalent dose level higher than the first equivalent dose level based on the first image data and the model for denoising. In some embodiments, the method may further include determining information relating to the ROI of the first subject based on the second image data and ecording the information relating to the ROI of the first subject.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: September 8, 2020
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Haining Sun, Guotao Quan, Yuan Bao, Wenjing Cao
  • Patent number: 10561388
    Abstract: A radiographing system includes a mobile terminal configured to store an examination time of a subject that is based on examination-related information about the subject, a radiographing apparatus configured to take a radiation image of the subject based on the examination-related information and to store an imaging time of the radiation image, and an association unit configured to associate the radiation image with the examination-related information based on the imaging time and the examination time.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: February 18, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ryo Tanaka
  • Patent number: 10485503
    Abstract: An imaging system includes radiation source (106) that emits radiation that traverses an examination region and a portion of a subject therein and a detector array (114) that detects radiation that traverses the examination region and the portion of the subject therein and generates a signal indicative thereof. A volume scan parameter recommender (120) recommends at least one spectral scan parameter value for a volume scan of the portion of the subject based on a spectral decomposition of first and second 2D projections acquired by the radiation source and detector array. The first and second 2D projections have different spectral characteristics. A console (122) employs the recommended at least one spectral scan parameter value to perform the volume scan of the portion of the subject.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: November 26, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Dirk Schaefer, Axel Thran, Thomas Koehler
  • Patent number: 10483009
    Abstract: The present invention presents a beam shaper for radiation imaging comprising a hollow beam shaper body filled with radiation attenuating gas. Radiation attenuation can be changed by adding or removing pressure to the gas or the housing containing the gas, making it suitable for use as a dynamic beam shaper in 3D radiation imaging.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: November 19, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Tobias Reusch
  • Patent number: 10402972
    Abstract: Example methods and systems are provided to perform radiation dose estimation for a target object. In one example, radiation dose estimation may include obtaining projection image data acquired using an imaging system, generating partially reconstructed volume image data based on the projection image data, and generating a partition of the projection image data. The partially reconstructed volume image data may be associated with a first region of a total radiation field. The partition may be associated with a second region of the total radiation field that is located before the first region from a direction of a radiation source. Radiation dose data may be estimated for the target object based on the partially reconstructed volume image data associated with the first region and the partition associated with the second region.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: September 3, 2019
    Assignee: VARIAN MEDICAL SYSTEMS INTERNATIONAL AG
    Inventors: Esa Kuusela, Lauri Halko
  • Patent number: 10383590
    Abstract: Methods and systems are provided for adaptive scan control. In one embodiment, a method comprises: while performing a scan of a scan subject, processing acquired projection data to measure a contrast level; responsive to the contrast level increasing above a first threshold, automatically switching the scan from a first scan protocol to a second scan protocol; responsive to the contrast level decreasing below a second threshold, automatically switching the scan from the second scan protocol to the first scan protocol; and responsive to the contrast level decreasing below a third threshold, automatically ending the scan. In this way, multiple scan protocols, such as angiography and perfusion scan protocols, can be interleaved within a single scan without the use of a separate timing bolus scan.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: August 20, 2019
    Assignee: General Electric Company
    Inventors: Michael Sarju Vaz, Elizabeth Janus Nett, David Joseph Pitterle, David Erik Chevalier, Christine Carol Hammond, Chelsey Lewis
  • Patent number: 10383583
    Abstract: An X-ray CT apparatus includes a processing circuit. The processing circuit adjusts an image taking area of a subject by receiving an operation performed on a light projector provided on a gantry and further sets the adjusted image taking area as an image taking condition included in first image taking conditions; adjusts an image taking area of the subject by receiving an operator's operation via terminal equipment and further sets the adjusted image taking area as an image taking condition included in second image taking conditions; and causes the gantry to perform the image taking process on the basis of selection information selecting from between the first and the second image taking conditions as image taking conditions used for performing the image taking process.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: August 20, 2019
    Assignee: Canon Medical Systems Corporation
    Inventors: Kenji Tomomura, Katsumi Gotanda, Takeo Nabatame
  • Patent number: 10307130
    Abstract: A dose calculation apparatus includes a specifying unit that specifies physical shape information of at least one of a body width and a body thickness of a subject using a ray-sum image generated from a plurality of medical images acquired by imaging the subject with an X-ray apparatus, an acquisition unit that acquires a correction coefficient corresponding to the physical shape information of at least one of the body width and the body thickness specified by the specifying unit from a storage unit configured to store a relationship between the physical shape information and the correction coefficient, and a calculation unit that calculates dose in accordance with a physical shape of the subject based on the correction coefficient acquired by the acquisition unit and a value representing X-ray intensity during taking of medical images.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: June 4, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tetsuya Horiuchi
  • Patent number: 10238357
    Abstract: In order to provide an X-ray CT apparatus and the like capable of obtaining an optimal X-ray dose for a dynamically changing X-ray irradiation region and reliably irradiating the X-ray irradiation region in a case where X-rays are applied with a spreading angle in a body axis direction, an X-ray CT apparatus 1 dynamically changes an X-ray irradiation region 201 for each view angle during scanning, and a system control device 124 changes a position of an analysis line 300 used to calculate an optimal tube current during scanning according to a position of the X-ray irradiation region 201 at each view angle, so as to obtain an optimal irradiation X-ray dose.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: March 26, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Kana Tanaka, Koichi Hirokawa, Yukio Kumagai
  • Patent number: 10238356
    Abstract: According to an embodiment, X-ray CT apparatus includes X-ray generator includes X-ray tube, high-voltage generator, detector, controller and circuitry. High-voltage generator generates tube voltage to be applied to X-ray tube. Detector detects X-rays irradiated from X-ray tube and transmitted through a subject. Controller controls high-voltage generator to scan the subject with first radiation dose and with second radiation dose lower than first radiation dose. Circuitry generates first image based on projection data acquired by scan at first radiation dose, generates second image based on projection data acquired by scan at second radiation dose, and displays first image and second image in common window.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: March 26, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Yojiro Suzuki, Katsuhiko Ishida, Takahiro Yoda, Katsuhito Morino
  • Patent number: 10238355
    Abstract: A tomography apparatus includes a data obtainer and an image processor. The data obtainer performs a tomography scan on a moving object and obtains raw data of the object The image processor reconstructs a first tomography image of the object for a first slice section in a first phase from the raw data and reconstructs a second tomography image in a second phase, which is different from the first phase, for the first slice section of the object by using the raw data. The image processor also generates motion information indicating a three-dimensional (3D) motion of the object. The second phase is a phase beyond a phase range of the raw data.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: March 26, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-young Choi, Toshihiro Rifu, Kyoung-yong Lee, Duhgoon Lee
  • Patent number: 10219771
    Abstract: A radiographic imaging apparatus includes: a radiographic image obtainer configured to acquire a first radiographic image of an object; and a processor configured to obtain attenuation information of the object based on the first radiographic image, determine candidate tube voltages and tube currents based on a quality of a second radiographic image to be obtained, and determine expected exposure doses corresponding to the determined candidate tube voltages and tube currents.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: March 5, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji Young Jung, Yeong-seon Kim, Chang Lae Lee, Jong Hyon Yi
  • Patent number: 10209207
    Abstract: An X-ray Talbot interferometer includes a source grating having a plurality of X-ray transmitting portions to transmit some X-rays from an X-ray source, a beam splitter grating configured to diffract the X-rays from the X-ray transmitting portions with a periodic structure to form interference patterns, an analyzer grating configured to block parts of the interference patterns, and a detector configured to detect X-rays from the analyzer grating. The X-ray transmitting portions of the source grating are arranged to form a periodic pattern in which spatial frequency components contained in a sideband resulting from modulation caused by the presence of an object are enhanced by superimposing the interference patterns corresponding to the respective X-ray transmitting portions. In the absence of any object, the positional relation between the periodic pattern and the grating pattern of the analyzer grating is substantially the same over the entire imaging field.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Soichiro Handa
  • Patent number: 10198812
    Abstract: A method and apparatus is provided to determine a reconstructed image from computed tomography projection data using iterative reconstruction with an objective function that includes modified weights. The modified weights can include, among other weight values, redundancy weights and statistical weights, which are modified to compress low-frequency components. Additionally, high-frequency components of the statistical weights can be compressed, amplified, or maintained at their current magnitude. The high-frequency components can be subject to a threshold-and-invert step, substituting an inverted value for each high-frequency component above a predefined threshold. Using the modified weights, the reconstructed image can be determined using penalized weighted least squares to minimize the objective function.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: February 5, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Qiulin Tang, Jian Zhou, Zhou Yu
  • Patent number: 10130316
    Abstract: An X-ray CT apparatus includes a table-top, an X-ray tube, a detector and a processing circuitry. The processing circuitry reconstructs a CT image based on a detection signal. The processing circuitry sets a field of view based on positions of a puncture needle and a puncture target on the CT image. The processing circuitry controls an X-ray irradiation coverage based on the field of view, the X-ray irradiation coverage being an area irradiated with the X-rays. The processing circuitry displays a CT image reconstructed in the field of view on a display, after the X-rays based on the X-rays whose irradiation coverage is controlled emitted and the detection signal is outputted.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: November 20, 2018
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Shintaro Funabasama, Takeo Nabatame
  • Patent number: 10107766
    Abstract: Among other things, one or more techniques and/or systems are described for defining imaging modes and for operating a photon counting radiation imaging system. A set of imaging modes with different counting schemes may be defined such that counting schemes will count detection events of a set of radiation events in different manners. For example, a first counting scheme may count primary detection events in a primary counter and secondary detection events in a secondary counter. A second counting scheme may count primary and secondary detection events in the primary counter. A third counting scheme may merely count detection events occurring within a primary detector cell associated with the primary counter. A fourth counting scheme may combine energy of detection events into merged energy. A selected imaging mode may be applied to the photon counting radiation imaging system in order to achieve desired image scanning characteristics (e.g., spatial resolution, dose savings, spectral ability).
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: October 23, 2018
    Assignee: Analogic Corporation
    Inventors: Doug Q. Abraham, Anton Deykoon, Basak Ulker Karbeyaz
  • Patent number: 10062466
    Abstract: An apparatus for reducing radiation scatter in an imaging system having an operational slot for receiving an anti-scatter grid. The apparatus includes an imaging system component having at least one storage slot formed therein for selectively storing an anti-scatter grid when the grid is not in the operational slot of the imaging system. The apparatus further includes an operational slot sensor configured to detect the presence of an anti-scatter grid and/or an imaging property of a grid in the operational slot. The system allows an operator to select an appropriate anti-scatter grid for use in the imaging system from one or more anti-scatter grids that are located within the operational and/or storage slots of the imaging system.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 28, 2018
    Assignee: General Electric Company
    Inventor: Francois Kotian
  • Patent number: 9955934
    Abstract: A method includes dynamically varying a data acquisition sample rate between at least two data acquisition sample rates during a contrast enhanced perfusion scan based on a level of contrast in image data generated during the scan. A system includes a computed tomography scanner and a console that controls the scanner based on a scan protocol, wherein the console dynamically varies a data acquisition sample rate of scanner during a contrast enhanced perfusion scan based on a level of contrast in the image data generated during the scan. A method for optimizing dose of a scan includes reducing a data acquisition sampling rate during at least a sub-portion of the scan in which a state of interest is not being scanned.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: May 1, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Mani Vembar, Thomas Bernard Ivanc, Sunny Virmani
  • Patent number: 9940719
    Abstract: A method and apparatus include and aligner configured to align an ordered stack of images by successively determining, for at least two already aligned images of the ordered stack, the respective misalignments with an unaligned image which is to be aligned next, and a selector configured to select from the at least two aligned images as a reference image that aligned image with which the unaligned image has the smallest amount of misalignment. The unaligned image is then aligned with the selected reference image.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: April 10, 2018
    Assignee: Koninklijke Philips N.V.
    Inventor: Rik E. J. Kneepkens
  • Patent number: 9839407
    Abstract: The present invention relates to calibration in X-ray phase contrast imaging. In order to remove the disturbance due to individual gain factors, a calibration filter grating (10) for a slit-scanning X-ray phase contrast imaging arrangement is provided that comprises a first plurality of filter segments (11) comprising a filter material (12) and a second plurality of opening segments (13). The filter segments and the opening segments are arranged alternating as a filter pattern (15). The filter material is made from a material with structural elements (14) comprising structural parameters in the micrometer region. The filter grating is movably arranged between an X-ray source grating (54) and an analyzer grating (60) of an interferometer unit in a slit-scanning system of a phase contrast imaging arrangement. The slit-scanning system is provided with a pre-collimator (55) comprising a plurality of bars (57) and slits (59). The filter pattern is aligned with the pre-collimator pattern (61).
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: December 12, 2017
    Assignee: Koninklijke Philips N.V.
    Inventors: Ewald Roessl, Gerhard Martens
  • Patent number: 9784696
    Abstract: The present invention pertains to a system and method for X-ray imaging wherein a targeted fluence at the detector for projection images can be achieved at a plurality of projection angles around the imaging subject by control of exposure times implemented during image acquisition. Exposure time for a second projection image may be determined by the fluence in a first projection image, and in a third projection image by the fluence in a second projection image, where projection images are acquired within two degrees of one another. An acquisition parameter calculation can be configured to calculate acquisition parameters, such as said exposure times, to achieve the targeted fluence in projection images and can be coupled to a rotation controller that implements the acquisition parameters by controlling a relative angle between the imaging subject and X-ray image acquisition device.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: October 10, 2017
    Assignee: Triple Ring Technologies, Inc.
    Inventor: Tobias Funk
  • Patent number: 9775575
    Abstract: A method for dark-field imaging includes acquiring dark-field image projections of an object with an imaging apparatus that includes an x-ray interferometer, applying a pressure wave having a predetermined frequency to the object for each acquired projection, wherein the predetermined frequency is different for each projection, and processing the acquired projections, thereby generating a 3D image of the object. In other words, the method corresponds to acoustically modulated X-ray dark field tomography. An imaging system (400) includes a scanner (401) configured for dark-field imaging, the scanner including: a source/detector pair (402/408) and a subject support (416), a pressure wave generator (420) configured to generate and transmit pressure waves having predetermined frequencies, and a console (424) that controls the scanner and the pressure wave generator to acquire at least two dark-field projection of an object with different pressure waves having different frequencies applied to the object.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: October 3, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Roland Proksa
  • Patent number: 9757081
    Abstract: An imaging system (200) is configured for grating-based DPCI. The imaging system includes a rotating gantry (204) that rotates around an examination region, a radiation source (208), supported by the rotating gantry, that emits radiation that traverses the examination region, a detector array (212), supported by the rotating gantry, that detects radiation that traverses the examination region, and an interferometer, supported by the rotating gantry, which includes a source grating (214), a phase grating (218), and an absorber grating (220). At least one of the phase grating or the absorber grating continuously translates with respect to the other during an integration period and the detector generates and outputs an electrical signal indicative of the detected radiation, wherein the electrical signal includes an absorption component, a coherence component and a phase component.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: September 12, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Roland Proksa
  • Patent number: 9743901
    Abstract: An X-ray imaging apparatus and method are provided. The X-ray imaging apparatus according to an aspect includes an X-ray source configured to radiate X-rays onto a subject region, an X-ray detector configured to detect the radiated X-rays and obtain a plurality of frame images of the subject region, and an ROI filter located between the X-ray source and the X-ray detector, configured to move toward the X-ray source and the X-ray detector, and configured to filter the X-rays radiated from the X-ray source.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: August 29, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae Mock Yi, Dong Goo Kang, Young Hun Sung, Jae Hak Lee, Seok Min Han
  • Patent number: 9730668
    Abstract: A method for operating a computed tomograph is provided, wherein an X-ray penetrates an object from different positions, a deposition of an individual dose is effected in at least one part of the object, and an image signal is generated in the detector by way of a transmitted intensity of the X-ray, wherein exposure-related parameters for the respective different positions are individually set such that with respect to a specific position, the share of the associated individual dose is raised if a raising of the individual dose in the specific position brings about a greater improvement in the image quality than in another position, or the share of the associated individual dose is lowered if a lowering of the individual dose in the specific position brings about a smaller deterioration in the image quality than in another position, in order to lower stochastic risks for mutations and uncontrolled cell growth.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: August 15, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventor: Philipp Bernhardt
  • Patent number: 9706971
    Abstract: A method for dual-energy spectra CT scanning and image reconstruction of two tomographic image datasets from a higher-energy and a lower-energy x-ray energy spectrum is disclosed. In at least one embodiment, readings are taken with the different x-ray energy spectra during the scanning; the different x-ray energy spectra are also created at least by different acceleration voltages of the x-ray source; and the spatial distribution of the scanning x-rays per x-ray energy spectrum is undertaken randomly or pseudo-randomly (in the absence of a regular pattern). With the attenuation datasets thus obtained, reconstructions of two tomographic image datasets in accordance with a least one iterative CS reconstruction method are carried out and subsequently the reconstructed tomographic image datasets are stored and/or output and/or further processed.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: July 18, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Stefan Popescu
  • Patent number: 9613439
    Abstract: A method of reconstructing an image of an object, the method including: determining, by a plurality of sensors, a waveform based on the object, wherein the plurality of sensors view the object from a plurality of directions; determining, by a pre-processing module, a plurality of measurements of the object using the waveform, wherein the plurality of measurements are arranged in a vector form; determining, by an option module, a sampling matrix, a dictionary, and a noise factor, wherein the sampling matrix represents a geometric arrangement of the plurality of sensors, and the dictionary is pre-selected by the option module; estimating, by an estimation module, a coefficient vector using the measurements, the sampling matrix, and the noise factor; and reconstructing, by a reconstruction module, the image, using the coefficient vector and the dictionary.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: April 4, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventor: Raghu G. Raj
  • Patent number: 9532753
    Abstract: The purpose of the present invention is to provide an X-ray imaging device capable of obtaining more diversified X-ray image information. To this end, the present invention comprises: an X-ray generation device for generating an X-ray; an X-ray detection device for detecting the X-ray which is generated in the X-ray generation device and penetrates the subject; and a collimator arranged between the X-ray generation device and the X-ray detection device, wherein the X-ray detection device and/or the collimator provides an X-ray imaging device configured to rotate relative to the X-ray generation device. Thus, since it is possible to adjust an X-ray detection area if necessary, the visual field of the imaging device can be adjusted such that diversified X-ray image information can be obtained.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: January 3, 2017
    Assignees: VATECH Co., Ltd., VATECH EWOO Holdings Co., Ltd.
    Inventors: Tae Woo Kim, Sung Il Choi
  • Patent number: 9526469
    Abstract: In an embodiment, an X-ray diagnostic apparatus includes an image capturing unit which captures an X-ray image of a subject on a tabletop, a movement mechanism which moves the tabletop and the image capturing unit relative to each other, an acquisition unit which acquires device position information on the tabletop and the image capturing unit in capturing the X-ray image, a display unit which displays the X-ray image captured by the image capturing unit, an input unit which inputs added information to be added to the X-ray image displayed on the display unit, and a management unit which manages the X-ray image captured by the image capturing unit, the device position information acquired by the acquisition unit, and the added information inputted by the input unit in association with one another.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: December 27, 2016
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Kazuo Imagawa, Masanori Matsumoto, Toshiya Waku, Keisuke Nakamura, Naotaka Sato
  • Patent number: 9486173
    Abstract: An imaging system includes a computed tomography (CT) acquisition unit and a processing unit. The CT acquisition unit includes an X-ray source and a CT detector configured to collect CT imaging data of an object to be imaged. The X-ray source and CT detector are configured to be rotated about the object to be imaged and to collect a series of views of the object as the X-ray source and CT detector rotate about the object to be imaged. The processing unit is operably coupled to the CT acquisition unit and configured to control the CT acquisition unit to vary a view duration for the views of the series. The view duration for a particular view defines an imaging information acquisition period for the particular view, wherein the series of views includes a first group of views having a first view duration and a second group of views having a second view duration that is different than the first view duration.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: November 8, 2016
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Jed Douglas Pack, Guangzhi Cao, David Joseph Pitterle, Grant Morey Stevens
  • Patent number: 9372163
    Abstract: A method of X-ray diffraction-based analysis for determining the structure of a crystal sample is provided. The method comprises conducting pre-experiment to collect a first set of diffraction images including reflections at corresponding intensities. The method also comprises conducting a main experiment to collect a second set of diffraction images, the diffraction images of the second set including the reflections with higher relative intensities than those produced during the first experiment, at least some of the diffraction images of the second set including topped reflections resulting from detector saturation. The method also includes a step of replacing intensities of the topped reflections from the second set of images with intensities obtained for the corresponding reflections from the first set of images.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: June 21, 2016
    Inventors: Michael Ruf, Joerg Kaercher, Bruce C Noll
  • Patent number: 9374880
    Abstract: A method and apparatus of current modulation in a computed tomography imaging system are provided. The method may include: selecting a plurality of sample points from an expected current modulation curve as approach points; establishing an actual current modulation curve, wherein an actual current value of the actual current modulation curve at an approach point approximates an expected current value of an expected current modulation curve, and a variation rate of the actual current is within an allowed range of the computed tomography imaging system; and modulating a current in an X-ray tube of the computed tomography imaging system according to the actual current modulation curve. According to the disclosure, an image valuable to the diagnosis can be obtained with the smallest radiation dose.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: June 21, 2016
    Assignee: SHENYANG NEUSOFT MEDICAL SYSTEMS CO., LTD.
    Inventor: Hongbo Wang
  • Patent number: 9326746
    Abstract: An X-ray CT apparatus includes a specifying unit, a setting unit, a controller, and a reconstruction unit. The specifying unit refers to exposure dose information to specify a high exposure area in an imaging area in a subject. The setting unit sets a scan condition under which a cross section of the imaging area can be imaged and under which X-rays are not directly applied to the high exposure area or another scan condition under which a cross section of the imaging area can be imaged and under which an X-ray radiation dose directly applied to the high exposure area is reduced relative to an area other than the high exposure area. The controller collects data of X-rays applied from an X-ray tube and detected by an X-ray detector under the set scan condition. The reconstruction unit reconstructs a tomographic image using the collected data of X-rays.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 3, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Tadaharu Kobayashi, Kenji Mizutani, Masanori Matsumoto
  • Patent number: 9326738
    Abstract: Approaches for acquiring CT image data corresponding to a full scan, but at a reduced dose are disclosed. In one implementation, X-ray tube current modulation is employed to reduce the effective dose. In other implementations, acquisition of sparse views, z-collimation, and two-rotation acquisition protocols may be employed to achieve a reduced dose relative to a full-scan acquisition protocol.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: May 3, 2016
    Assignee: General Electric Company
    Inventors: Zhye Yin, Roy Arnulf Helge Nilsen, Jiahua Fan, Thomas Matthew Benson, Bruno Kristiaan Bernard De Man, Jed Douglas Pack, Kai Zeng
  • Patent number: 9329140
    Abstract: An apparatus and method for reducing the X-ray flux in a computed-tomography (CT) scanner that includes a rotating X-ray source and a plurality of stationary photon-counting detectors configured to capture incident X-ray photons emitted from the X-ray source. A bowtie filter equipped with an edge filter that can be positioned in a reconfigurable manner such that the high X-ray flux at the leading edge of an X-ray fan beam incident on the detector is reduced. The CT apparatus includes a processor that is configured to compute the displacement of the edge filter in either a static or dynamic manner such that that the intensity of X-ray flux at the detectors in within acceptable operating limits.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: May 3, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Yu Zou, Yuexing Zhang, Xiaolan Wang
  • Patent number: 9265471
    Abstract: A method is disclosed for determining a multi-energy image via an x-ray device, including an x-ray source and an x-ray detector. The method includes a temporal sequence of individual steps. A first contrast agent-assisted image of an object area is first recorded with a first energy. Then a second contrast agent-assisted image of an object area is recorded with a second energy. A third recording of a third contrast agent-assisted image of the object area is now made with the first energy. By taking the temporal change in the contrast agent signal into account between the first and the third image, a multi-energy image is finally determined by means of the three recordings.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: February 23, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Thomas Flohr, Bernhard Schmidt
  • Patent number: 9259191
    Abstract: A collimator for a computed tomography imaging device can include first and second leaves positioned on and bounding opposing sides of a radiation delivery window. The first and second leaves can be movable to adjust at least one of a size or a location of the primary radiation delivery window relative a the radiation source in a direction non-parallel to an axis of rotation of the radiation source.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: February 16, 2016
    Assignee: University of Utah Research Foundation
    Inventors: Frederic Noo, Dominic Heuscher
  • Patent number: 9261467
    Abstract: A system and method include acquisition of projection data from a scanned object, the set of projection data comprising a plurality of projection measurements. The system and method also include calculation of a set of modified statistical weights from the projection data, wherein a respective modified statistical weight of the set of modified statistical weights comprises a deviation from an inverse variance of a corresponding projection measurement of the projection data. The system and method further include reconstruction of an image of the scanned object using the set of modified statistical weights as coefficients in an iterative reconstruction algorithm.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: February 16, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Jean-Baptiste Thibault, Xue Rui, Somesh Srivastava, Ken David Sauer, Lin Fu, Charles Addison Bouman, Jr.
  • Patent number: 9226719
    Abstract: An X-ray image diagnosis apparatus according to embodiments includes: a table on which an examinee lies down; a table driving unit configured to move the table upward and downward; an imaging device configured to take a side image of the examinee by irradiating a side of the examinee on the table with X-rays and detecting X-rays transmitted through the examinee; and a controller configured to control the table driving unit so that the table driving unit moves the table upward or downward to make a center position of the examinee on the table in a thickness direction of the examinee coincide with a center position of the side image in an upward-downward moving direction of the table.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: January 5, 2016
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Takahiro Goto
  • Patent number: 9198626
    Abstract: A method of contrast-enhanced computed tomography (CT) imaging can include repeatedly scanning a target region an applied power during a session. The applied power can be a first power for a first scan. After the first scan, the applied power for each of a plurality of scans can be selected based on an algorithm. The algorithm can be based on, for example, the attenuation indicated from a preceding scan in the session.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: December 1, 2015
    Assignee: University of Utah Research Foundation
    Inventors: Dominic Heuscher, Frederic Noo
  • Patent number: 9107591
    Abstract: An imaging system includes a radiation source that emits radiation that traverses an examination region. A controller activates the radiation source to emit radiation and deactivates the radiation source to stop radiation emission. The controller selectively activates the radiation source to emit radiation at one or more pre-determined angles. In another embodiment, the imaging system includes a data processing component that generates a virtual three dimensional image of an object of interest of the scanned subject based on the image data. In another embodiment, the imaging system is in a communication with a data manipulation and packaging component that generates at least a two dimensional or a three dimensional data set based on the volumetric image data and packages the data set in an object provided to a remote system that manipulates and navigates through the data set.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: August 18, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Shlomo Gotman, Udo Van Stevendaal, Peter Forthmann, Holger Schmitt
  • Patent number: 9113541
    Abstract: Among other things, one or more techniques and/or systems are described for reducing a voltage ripple in an electric signal. In this way, in radiographic imaging modalities, for example, undesired fluctuations in an output of a radiation source (e.g., undesirable fluctuations in an energy level of emitted photons) may be reduced. To reduce the voltage ripple, a (ripple reducing) electric signal is generated that comprises properties substantially similar to the voltage ripple, but opposite in phase. The (ripple reducing) electric signal is then combined with the original electric signal to generate a combined electric signal with a voltage ripple that is reduced relative to the voltage ripple of the electric signal as initially generated.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: August 18, 2015
    Assignee: Analogic Corporation
    Inventor: Hans J. Weedon
  • Patent number: 9089265
    Abstract: Systems and methods are provided for configuring parameters associated with a tomographic scanner. A tomographic scanner is configured to capture a scout image of a patient. A configuration component is configured to determine an average attenuation value representing at least a portion of the scout image and determine each of the tube voltage and tube current for the tomographic scanner from the average attenuation value.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: July 28, 2015
    Assignee: The Cleveland Clinic Foundation
    Inventor: Sandra S. Halliburton
  • Patent number: 9066649
    Abstract: An X-ray image acquisition apparatus employing phase-contrast imaging with enlarged field of view includes an X-ray source, an X-ray detector element having a detector size, a beam splitter grating and an analyzer grating. An object is arrangeable between the X-ray source and detector. The beam splitter grating and the analyzer grating are arrangeable between the X-ray source and detector. The X-ray source, the beam splitter grating, the analyzer grating and the X-ray detector are operatively coupled such that a phase-contrast image of the object is obtainable. The apparatus is configure to acquire a phase-contrast image having a field of view larger than the detector size. The X-ray detector element is displaceable where, by the displacement of the X-ray detector, a phase-contrast image of the enlarged field of view is obtainable.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: June 30, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Ewald Roessl, Klaus Juergen Engel, Gereon Vogtmeier, Dieter Geller, Gerhard Martens, Sebastian Siegmund Schusser, Thomas Koehler
  • Patent number: 9052266
    Abstract: An X-ray CT apparatus includes: a detector that detects X-rays that have passed through a subject; a data acquiring unit that, for each of predetermined energy bands, counts photons having an energy level included in the predetermined energy band, from among photons derived from the X-rays detected by the detector; an acquisition controlling unit that controls the data acquiring unit in such a manner that energy bands including energy levels which the photons representing substances that are not of interest have are each larger than an energy band including an energy level which the photons representing a substance of interest have, in accordance with an image taking condition under which an image taking process is performed on the subject; and an image reconstructing unit that reconstructs an X-ray CT image by using a counting result obtained by the data acquiring unit controlled by the acquisition controlling unit.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: June 9, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Hiroaki Miyazaki
  • Patent number: 9042514
    Abstract: Among other things, one or more systems and/or techniques are described for dynamically adjusting, in a fan-angle direction, attenuation of radiation during an examination of an object such that portions of the object that are not represented in resulting (tilted/targeted) images of the object are exposed to less radiation than portions of the object that are represented in resulting (tilted/targeted) images of the object. As a rotating gantry is rotated, blades of a pre-object collimator are dynamically repositioned to selectively attenuate emitted radiation. A collimator adjustment component may be configured to determine how to reposition the blades based at least in part upon at least one of a desired tilt of the resulting (tilted) image(s), a translational position of the object, and a gantry rotation angle, for example.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: May 26, 2015
    Assignee: Analogic Corporation
    Inventors: Doug Abraham, Lane Howitt, Mitchell Surowiec, Carl DeVincent, David Rozas