Temperature Detection Patents (Class 600/412)
  • Patent number: 10267875
    Abstract: A magnetic resonance (MR) system 10 includes at least one cable (30, 32, 34) that has at least one optic fiber component (31C, 31E, 33B, 35B) and an optical monitoring unit (37) in communication with the at least one optic fiber component (31C, 31E, 33B, 35B). The optical monitoring unit (37) is configured to determine temperatures at each of a plurality of positions along the at least one optic fiber component (31C, 31E, 33B, 35B). The optical monitoring unit (37) is further configured to halt an operation of the MR system (10) in response to at least one determined temperature. In accordance with the invention, the temperature of one or more cable traps forming part of the cable can be monitored and a faulty cable trap can be detected.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: April 23, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Laurens Cornelis Van Leeuwen, Johan Mathieu Alfons Helsen, Paulus Cornelius Hendrikus Adrianus Haans
  • Patent number: 10228434
    Abstract: Described here are systems and methods for producing images with a magnetic resonance imaging (“MRI”) system using a high-resolution, motion-robust, artifact-free segmented echo planar imaging (“EPI”) technique. In particular, a fast low angle excitation echo planar imaging technique (“FLEET”) using variable flip angle (“VFA”) radio frequency (“RF”) excitation pulses that are specifically designed to have a flat magnitude and phase profile across a slice for a range of different flip angles.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: March 12, 2019
    Assignee: The General Hospital Corporation
    Inventors: Jonathan R Polimeni, Thomas Witzel
  • Patent number: 10010727
    Abstract: The invention provides for a medical apparatus (300) comprising: a magnetic resonance imaging system (302); an ultrasonic system (322) for connecting to a catheter (324, 504, 600) with an ultrasound array (400, 402, 404, 508, 602, 604). The ultrasonic system is operable for driving the ultrasound array. Machine executable instructions (354, 356, 358) cause a processor (334) for controlling the medical apparatus to: generate (100, 202) at least one acoustic radiation impulse with the ultrasonic system, wherein the generated ultrasound energy is below a predetermined level; acquire (102, 204) the magnetic resonance data using an acoustic radiation force imaging pulse sequence; reconstruct (104, 206) at least one acoustic radiation force pulse image using the magnetic resonance data; and determine (106, 208) an energy deposition zone for the catheter using at least partially the at least one acoustic radiation force pulse image.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: July 3, 2018
    Assignee: Profound Medical Inc.
    Inventor: Max Oskar Kohler
  • Patent number: 9784810
    Abstract: In a method and apparatus to quickly determine regions of modified temperature in a sample volume by magnetic resonance tomography using a multi-echo sequence, one or more one-dimensional or two-dimensional images of regions of modified temperature are respectively determined.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: October 10, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stefan Popescu
  • Patent number: 9310450
    Abstract: A system (10) for margin assessment of an ex-vivo tissue (18), including an imaging scanner (12) controlled by an imaging control unit (14), and an ex-vivo sample holder (16) for holding a sample of an excised tissue (18), the sample holder (16) being sized such that excised lump edges (24) of the excised tissue (18) are forced against a surface of the sample holder (16) such that the edges (24) change shape to have a predetermined geometry, and wherein the imaging scanner (12) is positioned relative to the sample holder (16) such that the imaging scanner (12) acquires images not of all the tissue (18) but rather of the edges (24) that have the predetermined geometry and which are in a sensitive region (40) extending into a peripheral margin of the tissue (18).
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: April 12, 2016
    Assignee: CLEAR-CUT MEDICAL LTD.
    Inventor: Erez Golan
  • Patent number: 9289154
    Abstract: Techniques for temperature measurement and correction in long-term MR thermometry utilize a known temperature distribution in an MR imaging area as a baseline for absolute temperature measurement. Phase shifts that arise from magnetic field drifts are detected in one or more portions of the MR imaging area, facilitating correction of temperature measurements in an area of interest.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: March 22, 2016
    Assignee: InSightec Ltd.
    Inventors: Rita Schmidt, Hadas Ziso, Benny Assif, Osnat Dogadkin, David Freundlich, Yoav Levy, Shuki Vitek
  • Patent number: 9207299
    Abstract: A magnetic resonance imaging system measures the temperature of a morbid region to be heated in thermotherapy and controls a scan unit to execute an imaging operation in synchronism with heating by a heating device, and generates measurement temperature data on the basis of the phase change of magnetic resonance signals at different generation times obtained by the imaging operation.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: December 8, 2015
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Yasutoshi Ishihara
  • Patent number: 9119968
    Abstract: A band stop filter is provided for a lead wire of an active medical device (AMD). The band stop filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the band stop filter is resonant at a selected frequency. The Q of the inductor may be relatively maximized and the Q of the capacitor may be relatively minimized to reduce the overall Q of the band stop filter to attenuate current flow through the lead wire along a range of selected frequencies. In a preferred form, the band stop filter is integrated into a TIP and/or RING electrode for an active implantable medical device.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: September 1, 2015
    Assignee: Greatbatch Ltd.
    Inventors: Henry R. Halperin, Robert A. Stevenson
  • Patent number: 9061139
    Abstract: A TANK filter is provided for a lead wire of an active medical device (AMD). The TANK filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the TANK filter is resonant at a selected frequency. In a preferred form, the TANK filter reduces or even eliminates the use of ferro-magnetic materials, and instead uses non-ferromagnetic materials so as to reduce or eliminate MRI image artifacts or the force or torque otherwise associated during an MRI image scan.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 23, 2015
    Assignee: Greatbatch Ltd.
    Inventors: Robert A. Stevenson, Warren S. Dabney, Christine A. Frysz, Richard L. Brendel
  • Patent number: 9044593
    Abstract: A medical electrical lead having a conductor assembly covered by an insulating layer, and a shield covering positioned adjacent or proximate to at least a portion of the insulating layer in order to shield the conductor assembly from one or more electromagnetic fields. The shield covering is formed of a polymer-matrix composite. The polymer-matrix composite includes a polymeric resin having discontinuous conductive fillers provided therein. The discontinuous conductive fillers include one or more of nano-sized metal structures and nano-sized non-metallic conductive structures. The nano-sized non-metallic conductive structures can have a coating formed of one or more metals. The nano-sized non-metallic conductive structures can be formed of carbon. In turn, the nano-sized non-metallic conductive structures can include one or more of carbon nanofibers, carbon filaments, carbon nanotubes, and carbon nanoflakes.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: June 2, 2015
    Assignee: MEDTRONIC, INC.
    Inventors: Bernard Li, Chad Cai, Xingfu Chen
  • Patent number: 8989838
    Abstract: The present invention provides a method and apparatus for delivering and controlling thermal therapy to a volume of diseased tissue. Specifically, the invention includes using thermal imaging and other inputs to determine an acoustic (ultrasonic) treatment regime employing interstitial ultrasound applicators to deliver a required therapeutic temperature or thermal dose to the affected region in a body or organ. Various aspects of the treatment that can be controlled include individual transducer element operating power and frequency, as well as the rate of cooling and rotation of the entire applicator.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: March 24, 2015
    Assignee: Sunnybrook Health Sciences Centre
    Inventors: Rajiv Chopra, Michael Bronskill, Mathieu Burtnyk
  • Publication number: 20150051475
    Abstract: A medical apparatus (600, 700, 800, 900, 1000) comprising a magnetic resonance imaging system (602) comprising a magnet (604) with an imaging zone (608) for acquiring magnetic resonance data (642, 748) from a subject (618) from within the imaging zone. The medical apparatus further comprises a memory (632) for storing machine executable instructions (660, 662, 664, 760, 762, 764). The medical apparatus further comprises a processor (626) for controlling the medical apparatus. Execution of the instructions causes the processor to: acquire (100, 200, 300, 400, 506) B1 field map magnetic resonance data (642) using the magnetic resonance imaging system and determine (102, 206, 306, 408, 512) a temperature map (646) using the B1 field map magnetic resonance data.
    Type: Application
    Filed: January 30, 2013
    Publication date: February 19, 2015
    Inventors: Christoph Leussler, Ulrich Katscher
  • Publication number: 20150038828
    Abstract: The invention provides for a medical apparatus (400, 500, 600, 700, 800) comprising a magnetic resonance imaging system (402) for acquiring magnetic resonance thermometry data (442) from a subject (418). The magnetic resonance imaging system comprises a magnet (404) with an imaging zone (408). The medical apparatus further comprises a memory (432) for storing machine executable instructions (460, 462, 464, 466, 10, 660). The medical apparatus further comprises a processor (426) for controlling the medical apparatus, wherein execution of the machine executable instructions causes the processor to: acquire (100, 200, 300) the magnetic resonance thermometry data from multiple slices (421, 421?, 421?) within the imaging zone by controlling the magnetic resonance imaging system; and interpolate (102, 202, 204, 302, 304) a three dimensional thermal dose estimate (444) in accordance with the magnetic resonance thermometry data.
    Type: Application
    Filed: March 5, 2013
    Publication date: February 5, 2015
    Applicant: Koninklijke Philips N.V.
    Inventor: Max Oskar Köhler
  • Patent number: 8922365
    Abstract: Embodiments disclosed herein relate to systems and methods for monitoring and alerting a body temperature of a person under guardianship. A wireless signal emitting body temperature sensor is configured to transmit a wireless signal including a detected temperature value. The wireless signal is received by a wireless signal receiving chip of a wireless signal receiving and processing precaution device carried by a guardian, and processed by a central processing chip. If the detected value is over the maximum value or is under the minimum value, an alarming signal will timely notify the guardian about abnormality in the body temperature of the person under guardianship.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: December 30, 2014
    Inventor: Weidong Liu
  • Patent number: 8905036
    Abstract: The invention concerns an assembly for heat treatment of a region of a biological tissue (410) comprising energy-generating means (100) to supply energy to the region; means (200) for measuring and recording spatial temperature distribution in said region; a control unit (300) comprising means for point-to-point digital processing of the temperature distribution in the region. The invention is characterised in that the energy-generating means comprise means(110) for spatial and temporal distribution of the power available to them on said region, the control unit (300) comprising means (330, 350), based on the temperature distribution, for controlling the amount and distribution of energy supplied by the generating means (100).
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: December 9, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Chrétien Moonen, Bruno Quesson, Frédéric Vimeux
  • Patent number: 8867811
    Abstract: A therapeutic system, comprising: a MR imaging unit arranged to acquire MR signals from a patient in an examination volume, and a thermal treatment unit for depositing thermal energy within tissue of the patient. The system is arranged for: initiating a thermal treatment by heating the tissue at a focus within the examination volume selectively acquiring MR signals from a first image plane, including the focus, reconstructing a thermographic MR image from the MR signals acquired from the first image plane, computing a baseline thermographic MR image from a temperature distribution within at least one second image plane, moving the focus to a new position within the examination volume, changing the position and/or orientation of the first image plane corresponding to the new position of the focus, repeating the acquiring and reconstructing steps, wherein the baseline thermographic MR image is used for thermographic image reconstruction in a subsequent reconstructing step.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: October 21, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Balasundara Raju, Ajay Anand, Gosta Jakob Ehnholm
  • Publication number: 20140309519
    Abstract: A magnetic resonance scanner (12) is configured for themographic imagin. One or more processors (28) receive (56) thermal image data from the magnetic resonance scanner and reconstruct at least one thermal image in which each voxel includes a measure of temperature change. The one or more processors identify (58) thermally abnormal voxels. A display (44) displays at least one reconstructed image with the identified abnormal thermal locations.
    Type: Application
    Filed: December 13, 2012
    Publication date: October 16, 2014
    Inventors: Feng Huang, Arne Reykowski, George Randall Duensing
  • Patent number: 8843191
    Abstract: Disclosed are a method for measuring temperature distribution, which measures temperature distribution not only in fat tissue but also in mixed tissue containing high-water content tissue and fat tissue, and a method for imaging temperature distribution. In the disclosed method, a water signal, which is dependent on the water components of the tissue to be measured, and a fat signal, which is dependent on the fat components of the tissue to be measured, are acquired by means of nuclear magnetic resonance spectroscopy. Fatty acid signals are acquired by separating out the fat signal into various fatty acid components. The temperature of high-water content tissue is measured on the basis of the correlation between the water signal and the water temperature, and the temperature of fat tissue is measured on the basis of the correlation between each of the various fatty acid signals and the fat temperature.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: September 23, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: Kagayaki Kuroda
  • Publication number: 20140275969
    Abstract: Disclosed embodiments for assessing brown adipose tissue use imaging of metabolic contrast agents. For example, activated brown adipose tissue may be assessed by evaluating a difference in production of the hyperpolarized 13C metabolic contrast agent from a pre-polarized 13C metabolic contrast agent precursor before and after exposure of the subject to an activating event or agent. In one embodiment, the subject is given a dose of norepinephrine, and the production of the hyperpolarized 13C metabolic contrast agent before and after the dose is assessed.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: General Electric Company
    Inventors: Angus Zoen Lau, Albert Po-Fu Chen, Charles H. Cunningham
  • Patent number: 8810246
    Abstract: Proton resonance frequency shift thermometry may be improved by combining multibaseline and referenceless thermometry.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: August 19, 2014
    Assignees: Insightec Ltd., The Board of Trustees of The Leland Stanford Junior University
    Inventors: William A. Grissom, Kim Butts Pauly, Michael Lustig, Yoav Medan, Yoav Levy, Viola Rieke
  • Patent number: 8801615
    Abstract: A system and method for treating tissue uses an ultrasound therapy system including an ultrasonic applicator having has at least one transducer element. Steering and focusing of ultrasound beams uses at least one variable focus lens, which may be a fluid focus lens, attached to each transducer element so that focus of the variable focus lens is controlled by a voltage signal. A treatment controller receives input from an imager and controls the voltage applied to the variable focus lens. The treatment controller controls the lens voltage signals, at least partially determined by the input from the imager, and directs an ultrasonic treatment beam emitted by the transducer element. Fine adjustment of the therapy beam is achieved to deliver therapy for various prostate sizes and shapes while avoiding damage to critical structures such as the rectal wall and nerve bundles.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: August 12, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Anna Theresa Fernandez, Balasundara Raju
  • Patent number: 8792961
    Abstract: In a method and magnetic resonance (MR) system to create an MR magnitude image data set and a phase image data set of an examination subject, first echo signals in a first raw MR data set are detected after a first echo time TE1 and at least second echo signals in at least one second raw MR data set are detected after a second echo time TE2 that is longer than TE1, a magnitude image data set is generated on the basis of the first raw MR data set and the at least one second raw MR data set with averaging of the first and the at least one second raw MR data set, and the phase image data set is generated based on the phase information contained in the at least two raw MR data sets, with averaging of the respective phase information contained in the at least two raw MR data sets.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: July 29, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Patric Gross, Joerg Roland
  • Patent number: 8706190
    Abstract: In a method or system for magnetic resonance imaging based temperature monitoring for real-time feedback to a physician for a cryoablation therapy of a lesion which creates an ice ball of the lesion to induce cell death, the magnetic resonance imaging system, using proton resonance frequency imaging, obtains a real-time temperature image of the ice ball of the lesion undergoing the cryoablation therapy and the adjacent surrounding tissue. By use of an algorithm, correcting temperature errors at a border of the ice ball are corrected in the real-time image, the temperature error correction correcting susceptibility contrast errors caused by a distortion of the local magnetic field at the border of the ice ball.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: April 22, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Patrick Gross, Antje Kickhefel, Joerg Roland, Rares Salomir
  • Patent number: 8583211
    Abstract: In a method for temperature control in MR-guided administration of ultrasound, ultrasound therapy is administered to a patient at an in vivo site by emitting focused ultrasound into the site at multiple foci with a multi-focus ultrasound therapy device. The temperature is monitored in a localized region of an examination subject in which the site is located during the therapy in real-time by MR thermometry. From the MR thermometry, characteristics of the temperature distribution in the monitored region of the examination subject are automatically identified. Temperature control is implemented by regulating the energy output of the ultrasound therapy device, according to a rapidly converging master equation.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: November 12, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rares Salomir, Magalie Viallon
  • Patent number: 8519711
    Abstract: In an MRI apparatus, a detecting unit that includes a thermographic imaging equipment and a normal imaging camera detects a change in temperature of an imaging space from outside of the imaging space. A judging unit judges whether the imaging space has a point at a temperature greater than a threshold TH, and if the judging unit judges the imaging space has such a point with a temperature greater than the threshold, the apparatus stops the sequence that applies a gradient magnetic field to the subject.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 27, 2013
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Yoshitomo Sakakura
  • Patent number: 8478380
    Abstract: The in vivo measurement of tissue temperature is performed during a medical procedure using an MRI system. Fat and Water images are acquired at each temperature measurement time and corresponding phase images are produced. A temperature map is produced by subtracting the phase at each Fat image pixel from the corresponding pixel in the Water phase image to improve measurement accuracy in tissues with fat/water mixtures.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: July 2, 2013
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Brian J. Soher, Scott B. Reeder
  • Publication number: 20130158387
    Abstract: An apparatus (300, 400, 500) comprising a magnetic resonance imaging system (302), the magnetic resonance imaging system comprising: a magnet (306) adapted for generating a magnetic field for orientating the magnetic spins of nuclei of a subject (310) located within an imaging volume (308); a radio frequency transceiver (320) adapted for acquiring magnetic resonance data (346) using a radio frequency coil (318); a computer system (336) comprising a processor (338), wherein the computer system is adapted for controlling the apparatus; and a memory (342, 344) containing machine readable instructions (354, 356, 358, 360, 362), wherein execution of the instructions cause the processor to perform the steps of: acquiring (100, 204) magnetic resonance data using the magnetic resonance imaging system, wherein the magnetic resonance data comprises transverse relaxometry data, and calculating (102, 206) the temperature of the subject within a temperature measurement volume (332) in accordance with the transverse relaxo
    Type: Application
    Filed: August 26, 2011
    Publication date: June 20, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Jukka Ilmari Tanttu
  • Publication number: 20130150705
    Abstract: A method for producing an image of a blood vessel in a patient utilizing temperature sensitive MRI measurement. The method includes introducing a fluid in a blood vessel, obtaining magnetic resonance information from the blood vessel, and determining a magnetic resonance parameter using the magnetic resonance information. The method further includes using the magnetic resonance parameter to determine a temperature differential in the blood vessel and producing an image of the blood vessel based on the temperature differential. Systems for producing an image of a blood vessel in a patient using temperature sensitive MRI measurements are also provided.
    Type: Application
    Filed: October 5, 2012
    Publication date: June 13, 2013
    Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventor: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
  • Publication number: 20130102880
    Abstract: A method for photomagnetic imaging of tissue includes the steps of heating the tissue using light; measuring a change in temperature of the tissue with magnetic resonance thermometry; and creating an optical property map from the measured change in temperature. An apparatus for performing photomagnetic imaging of tissue which includes a light source to heat the tissue, a magnetic resonance imaging system to measure a change in temperature of the tissue, and a data processor to generate an optical property map from the measured change in temperature. An optical property map of tissue photomagnetic imaging of tissue produced by: heating the tissue using light; measuring a change in temperature of the tissue with magnetic resonance thermometry; and creating an optical property map from the measured change in temperature.
    Type: Application
    Filed: October 17, 2012
    Publication date: April 25, 2013
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventor: THE REGENTS OF THE UNIVERSITY OF CALIF
  • Patent number: 8428689
    Abstract: A therapeutic system includes a therapy module to direct a therapeutic action, e.g. focused ultrasound or RF energy to a target. An imaging module, such as a magnetic resonance examination system, generates image information of a therapy region that includes the target. By way of a motion analysis module, a motion vector field is derived from the image information of the therapy region. A control module controls the therapy module based on the motion vector field. For example, based on t the motion vector field, an accurate temperature distribution is derived from magnetic resonance signals and the motion vector field. Also magnetic resonance elastography data may be employed to improve the accuracy of the temperature distribution.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: April 23, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Michael Harald Kuhn, Julius Cohen
  • Publication number: 20130090548
    Abstract: Renal screening systems include a circuit configured to electronically analyze MRI image data of a subject to evaluate renal function and generate a renal-risk report for a plurality of different therapeutic agents based on renal responses to test doses of each of the agents.
    Type: Application
    Filed: October 10, 2012
    Publication date: April 11, 2013
    Applicant: Wake Forest University Health Sciences
    Inventor: Wake Forest University Health Sciences
  • Patent number: 8417316
    Abstract: A novel MRI contrast technique enables to observe tissue properties not observable by previously known MRI methods. A difference between two disclosed pulse sequences is used to measure magnetization exchange time between water molecules and macromolecules such as proteins, thereby producing a measure highly sensitive to tissue changes resulting from coagulation, yet relatively insensitive to temperature fluctuations. This result is applied to an imaging method and provides direct visualization of the effects of surgical thermal ablation procedures.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: April 9, 2013
    Assignee: Ramot at Tel-Aviv University Ltd.
    Inventors: Dina Carasso, Uzi Eliav, Gil Navon
  • Patent number: 8401614
    Abstract: A method for reducing errors in the measurement of temperature by magnetic resonance, for use in magnetic resonance imaging-guided HIFU equipment, includes acquiring an MR phase image, as a reference image, before heating an area to be heated with the HIFU equipment; acquiring another MR phase image, as a heated image, during or after the heating by the HIFU equipment; and calculating the temperature change in the heated area according to said heated image and said reference image; and making compensation to said temperature change according to the change in the magnetic field caused by the position change of an ultrasonic transducer in said HIFU equipment. The method can reduce significantly the temperature errors resulting from the position changes of the ultrasonic transducer.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: March 19, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Xiao Dong Zhou, Cheng Ni
  • Patent number: 8386016
    Abstract: In a method and device for determination of a position shift, first image data of a body region of a treatment-positioned patient that contain derivable temperature information are acquired. A focal area in the body region is determined, and the focus of a hyperthermia applicator can be aligned on the focal area. Second image data of the body region of the treatment-positioned patient that contain derivable temperature information are acquired, and a position shift of the focal area is determined by a comparison of the second image data with the first image data.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: February 26, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Florian Steinmeyer, Michael Zwanger
  • Patent number: 8326010
    Abstract: The invention provides a method for a multi-echo acquisition technique capable of obtaining separate water only and fat only images in anatomies having large time-varying phase disturbances. This multi-echo technique is also useful in anatomies where magnetic field inhomogeneity is significant. Also provided is a system, which is capable of producing a reconstructed complex water image whose phase component maintains the temperature dependent phase information. Similarly, the reconstructed fat image maintains the phase information pertaining to the time-varying phase disturbances.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: December 4, 2012
    Assignee: General Electric Company
    Inventors: Lorne Wyatt Hofstetter, Thomas Kwok-Fah Foo, Cynthia Elizabeth Landberg Davis, Desmond Teck Beng Yeo
  • Patent number: 8311609
    Abstract: A computing unit is arranged to access phase images computed from the image data and representative of the target medium and the reference medium and carry out computing steps to yield temperature difference map. The operation of the computing is controlled by a computer program carrying computing steps programmed as instructions to a processor. The apparatus (1) includes a storage unit (8) arranged to store suitable image data which are accessed by the computer program during the computations. The storage unit (8) stores system parameters of the magnetic resonance apparatus, like the strength of the main field (B0), gyromagnetic ratio (?), and suitable parameters of a target medium, like screen constant (?), in a file (3). The apparatus (1) further includes a working memory (6), typically based on RAM.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: November 13, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Paul Royston Harvey, Andriy Shmatukha
  • Publication number: 20120271152
    Abstract: Disclosed are a method for measuring temperature distribution, which measures temperature distribution not only in fat tissue but also in mixed tissue containing high-water content tissue and fat tissue, and a method for imaging temperature distribution. In the disclosed method, a water signal, which is dependent on the water components of the tissue to be measured, and a fat signal, which is dependent on the fat components of the tissue to be measured, are acquired by means of nuclear magnetic resonance spectroscopy. Fatty acid signals are acquired by separating out the fat signal into various fatty acid components. The temperature of high-water content tissue is measured on the basis of the correlation between the water signal and the water temperature, and the temperature of fat tissue is measured on the basis of the correlation between each of the various fatty acid signals and the fat temperature.
    Type: Application
    Filed: September 29, 2010
    Publication date: October 25, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Kagayaki Kuroda
  • Patent number: 8260397
    Abstract: In a method to determine a kidney function parameter of kidneys of an examination person with the aid of magnetic resonance tomography, at least one magnetic resonance measurement is implemented for an examination region of the examination person that comprises a urinary bladder of the examination person, to acquire magnetic resonance data from the examination region that include at least image data. The concentration of a urophanic substance in the urinary bladder of the examination person is automatically determined based on the acquired magnetic resonance data. A volume of the urinary bladder is automatically determined based on the acquired image data. A kidney function parameter of the kidneys of the examination person is automatically determined on the basis of the determined concentration of the urophanic substance in the urinary bladder and of the specific volume of the urinary bladder.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: September 4, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jan Ruff, Stefan Roell, Sebastian Schmidt
  • Patent number: 8229544
    Abstract: In one aspect, in general, a method is provided for detecting temperature and protein denaturation of a tissue during thermal therapy. The method includes generating a plurality of MR pulse sequences that include a first group of pulse sequences and a second group of pulse sequences, and receiving a plurality of response signals that include a first and second group of response signals in response to the first and second groups of pulse sequences, respectively. A first information associated with a degree of protein denaturation of the tissue is determined based on the first and second groups of response signals. A second information associated with a temperature of the tissue is determined based on at least some of the plurality of response signals.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: July 24, 2012
    Assignee: National Health Research Institutes
    Inventors: Wen-Yih Isaac Tseng, Hsu-Hsia Peng, Teng-Yi Huang, Hsiao-Wen Chung
  • Patent number: 8224421
    Abstract: A cardiac stimulator has an implantable cardiac lead that carries a temperature sensitive element with a surface thereof in contact with biological matter. The temperature sensitive element emits a temperature signal corresponding to the temperature of biological matter, such as blood, in contact with the surface of the temperature sensitive element. Processing circuitry receives the temperature signal and determines a variability thereof within a selected time interval. A status signal is emitted dependent on this variability.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: July 17, 2012
    Assignee: St. Jude Medical AB
    Inventors: Per Lagercrantz, Anna-Karin Johansson, Karin Järeverud
  • Patent number: 8219207
    Abstract: An implantable medical device includes an electrode having a thermal switch. The thermal switch is configured to electrically decouple components of the implantable medical device when in contact with tissue at temperatures above normal body temperature.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: July 10, 2012
    Assignee: Medtronic, Inc.
    Inventor: James M. Olsen
  • Patent number: 8165682
    Abstract: A system and method for predicting and avoiding a seizure in a patient. The system and method includes use of an implanted surface acoustic wave probe and coupled RF antenna to monitor temperature of the patient's brain, critical changes in the temperature characteristic of a precursor to the seizure. The system can activate an implanted cooling unit which can avoid or minimize a seizure in the patient.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: April 24, 2012
    Assignee: Uchicago Argonne, LLC
    Inventors: Nachappa Gopalsami, Stanislav Kulikov, Ivan Osorio, Apostolos C. Raptis
  • Publication number: 20120071746
    Abstract: During the thermal treatment of an anatomical zone of interest, tissue temperature within the zone may be determined with a computational model whose parameters are adjusted using spectroscopy-based temperature measurements at interfaces of fat and non-fat tissues.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 22, 2012
    Inventors: Kobi Vortman, David Freundlich, Shuki Vitek
  • Patent number: 8116843
    Abstract: In a method for automatically selecting a region of interest covering a heated area, in the context of high intensity focused ultrasonic technology during acquisition of magnetic resonance data, phase data of a scanned area are acquired, and a heated area is identified in the scanned area according to the phase data acquired. An image is reconstructed and displayed, and in the displayed image a region of interest covering the heated area is automatically demarcated according to a predetermined size of said region of interest that covers and is larger than the heated area. The method causes the heated area to be automatically and completely included in the region of interest; and eliminates the instability of a manual selection of the region of interest.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: February 14, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Yong Ming Dai, Xiao Dong Zhou
  • Publication number: 20110263969
    Abstract: The present embodiments relate to methods and devices for measuring a spatial temperature and/or SAR distribution in an examination subject in a magnetic resonance tomography device. Microwave thermosensors are provided for measuring the temperature with the aid of microwaves.
    Type: Application
    Filed: April 22, 2011
    Publication date: October 27, 2011
    Inventor: Jörg Ulrich Fontius
  • Patent number: 8041801
    Abstract: State information of a user is detected via a biometric information sensor and is stored, in a nonvolatile memory, in association with a content identifier of content that is being reproduced for the user when the state information is detected. An information request, including the state information of another user at another terminal apparatus, is generated and transmitted. Provided information transmitted in response to the information request is received and provided to the user. When an information request is received by the user, information is extracted from the nonvolatile memory based on the state information of another user. Provided information that is based on the extracted information is transmitted to another user.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: October 18, 2011
    Assignee: Sony Corporation
    Inventors: Takatoshi Nakamura, Toru Sasaki, Yuichi Sakai, Yoichiro Sako, Toshiro Terauchi, Hirofumi Tamori, Makoto Inoue, Katsuya Shirai, Motoyuki Takai, Kenichi Makino, Akihiro Komori, Akane Sano, Susumu Takatsuka
  • Patent number: 8032335
    Abstract: Provided are methods, systems and computer program products evaluating magnetic resonance (MR) signals from a sample. The methods and systems can be used to evaluate MR signals from various constituents (e.g., metabolites, macromolecules) of the sample.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: October 4, 2011
    Assignee: Emory University
    Inventors: Diego R. Martin, Xiaoping Hu, Nashiely Pineda-Alonso, Puneet Sharma
  • Patent number: 8024025
    Abstract: An apparatus and method for correcting magnetic resonance temperature measurements is disclosed. In one aspect, the method identifies monitoring regions of interest outside a therapeutic region of interest. Next, a pulse sequence sensitive to changes in T1 and proton density is used to measure the temperature changes in these regions. Next, the PRFS is measured in these same regions. The PRFS in these regions will be caused both by the desired shift from temperature change, and the undesired shift from background magnetic field changes. Using the measured temperature changes from the T1-method, the component of the PRFS due to actual temperature changes is subtracted from the PRFS method, leaving only the component caused by the unwanted magnetic field changes. This analysis is performed separately for each region. At the end of this step, one has measured the change in background magnetic field within each region.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: September 20, 2011
    Assignee: General Electric Company
    Inventors: Richard Philip Mallozzi, Charles Lucian Dumoulin
  • Publication number: 20110224536
    Abstract: A method and apparatus for determining a temperature differential at a portion of a patient's body utilizing temperature sensitive MRI measurements. A diagnostic fluid bolus is administered into a blood vessel of the patient, wherein the diagnostic fluid bolus has a diagnostic fluid bolus temperature waveform. MRI measurements are used to determine the thermodiluted temperature waveform of the diagnostic fluid bolus at a target site in the body spaced away from the administration site. The temperature differential may be used to determine a cardiovascular parameter.
    Type: Application
    Filed: August 1, 2008
    Publication date: September 15, 2011
    Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventors: John Pile-Spellman, Erwin Lin
  • Publication number: 20110092801
    Abstract: In a method and magnetic resonance (MR) system to create an MR magnitude image data set and a phase image data set of an examination subject, first echo signals in a first raw MR data set are detected after a first echo time TE1 and at least second echo signals in at least one second raw MR data set are detected after a second echo time TE2 that is longer than TE1, a magnitude image data set is generated on the basis of the first raw MR data set and the at least one second raw MR data set with averaging of the first and the at least one second raw MR data set, and the phase image data set is generated based on the phase information contained in the at least two raw MR data sets, with averaging of the respective phase information contained in the at least two raw MR data sets.
    Type: Application
    Filed: October 11, 2010
    Publication date: April 21, 2011
    Inventors: Patrick Gross, Joerg Roland