Patents by Inventor David Ruimi
David Ruimi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20160199019Abstract: A tracking system for tracking focal spot position of an x-ray source includes a detector array including a plurality of detecting elements sensitive to x-ray radiation and a grid overlaid on a detecting surface of the detector array. The grid is formed from an array of vanes and has a density greater than a density of the detector array.Type: ApplicationFiled: January 13, 2015Publication date: July 14, 2016Inventors: David RUIMI, Lana VOLOKH, Evgeniy KUKSIN
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Patent number: 8964942Abstract: Disclosed is a collimator assembly for a multi-radiation-source medical imaging system (e.g. CT) and a medical imaging system utilizing the collimator. According to some embodiments of the present invention, there is provided a collimator assembly including at least two apertures, which apertures are adjustable substantially synchronously by one or more actuators.Type: GrantFiled: March 12, 2009Date of Patent: February 24, 2015Assignee: Arineta Ltd.Inventors: Ehud Dafni, David Ruimi
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Patent number: 8873703Abstract: A CT scanner with scatter correction device and a method for scatter correction are provided. The method comprises positioning shields for shielding some of the CT detector elements from direct X ray radiation, while allowing scattered radiation to arrive at said shielded elements; measuring scatter signals from said shielded elements, indicative of scattered radiation intensity; and correcting for scatter by subtracting scatter intensity values estimated from said measured scatter signals from signals measured by unshielded detector elements.Type: GrantFiled: May 7, 2009Date of Patent: October 28, 2014Assignee: Arineta Ltd.Inventors: David Ruimi, Olga Shapiro, Ehud Dafni
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Patent number: 8831319Abstract: A method of correcting CT numbers in image data includes selecting at least one reference region in a CT image, wherein the selected region is a region associated with substantially same CT number when no artifacts are present in the CT image, estimating artifacts in at least one other region of the CT image based at least in part on detected CT numbers in the at least one reference region, and correcting CT numbers in the at least one other region of the CT image based on the estimated artifacts.Type: GrantFiled: November 16, 2010Date of Patent: September 9, 2014Assignee: Arineta Ltd.Inventors: Ehud Dafni, David Ruimi
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Publication number: 20140037045Abstract: A dual energy CT scanner includes an X ray source generating an X-ray beam, a stacked detector array for detecting radiation from the X-ray beam, the stacked detector array including a first layer of detectors and a second layer of detectors, wherein a packing density of detectors in at least a portion of the first layer is different than a packing density of detectors in a corresponding portion of the second layer, a data acquisition unit for sampling data from the detectors in the first and second layer; and an image reconstruction unit for reconstructing an image from data acquired from at least one layer of the stacked detector array.Type: ApplicationFiled: April 4, 2012Publication date: February 6, 2014Applicant: Arineta Ltd.Inventors: Ehud Dafni, David Ruimi, Olga Shapiro
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Patent number: 8571172Abstract: A CT scanner comprises at least one cone beam x-ray source assembly mounted on a gantry frame, the gantry frame rotatable about a rotation axis, the x-ray source assembly operable to emit a cone beam at an orientation with respect to the rotation axis, and a controller operable to adjust an orientation of the cone beam during a rotation cycle of the gantry, wherein the controller adjusts the orientation to radiate a substantially same volume of interest over the rotation cycle.Type: GrantFiled: April 6, 2009Date of Patent: October 29, 2013Assignee: Arineta Ltd.Inventors: Ehud Dafni, Rafi Brada, David Ruimi
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Publication number: 20120236987Abstract: A CT scanner for multiple energy CT scanning of a subject having an X-Ray source adapted to rotate about the subject; and a detector array, having a plurality of detector elements, adapted to acquire attenuation data for X-Rays that have been attenuated by a subject disposed between said X-Ray source and said detector array, said detector array comprising at least two types of detector element, which are differ by their spectral response. The scanner is adapted to generate images associated with the different X-Ray energy spectra.Type: ApplicationFiled: March 16, 2012Publication date: September 20, 2012Inventors: DAVID RUIMI, OLGA SHAPIRO, EHUD DAFNI
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Patent number: 8199883Abstract: The invention is directed to an x-ray flux management device that adaptively attenuates an x-ray beam to limit the incident flux reaching a subject and radiographic detectors in potentially high-flux areas while not affecting the incident flux and detector measurements in low-flux regions. While the invention is particularly well-suited for CT, the invention is also applicable with other x-ray imaging systems. In addition to reducing the required detector system dynamic range, the present invention provides an added advantage of reducing radiation dose.Type: GrantFiled: April 7, 2010Date of Patent: June 12, 2012Assignee: General Electric CompanyInventors: Jerome Stephen Arenson, David Ruimi, Oded Meirav, Robert Harry Armstrong
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Patent number: 8121250Abstract: A method for calibration of a CT comprises sequentially positioning a phantom having a non-circular cross section and a length commensurate with the extent of a detector at a plurality of positions between an X ray source and the detector array or sequentially positioning a plurality of generally similar phantoms or sequentially positioning a same phantom at a plurality of positions between the X ray source and detector array of the CT scanner; acquiring calibration attenuation data for X rays that have been attenuated by traversing the phantom positioned at each of the plurality of positions; and calculating calibration corrections for CT scanner scan data from the calibration attenuation data.Type: GrantFiled: February 2, 2010Date of Patent: February 21, 2012Assignee: Arineta Ltd.Inventors: Ehud Dafni, Olga Shapiro, David Ruimi
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Patent number: 8102963Abstract: A CT scanner includes a first X-ray beam source, and a second X-ray beam source. With such an apparatus, first source is used to monitor buildup of an injected contrast agent in a selected region of interest relative to a patient and at least the second source is used to perform diagnostic scanning when the buildup of the contrast agent reaches a desired level.Type: GrantFiled: April 6, 2009Date of Patent: January 24, 2012Assignee: Arineta Ltd.Inventors: Olga Shapiro, David Ruimi, Rafi Brada, Ehud Dafni
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Patent number: 8077826Abstract: A CT scanner with scatter correction device and a method for scatter correction are provided. The method of correcting CT images from artifacts caused by scattered radiation comprises affixing to the non-rotating frame of the CT gantry a plurality of shields for shielding some of the CT detector elements from direct X ray radiation, while allowing scattered radiation to arrive at said shielded elements; measuring scatter signals from said shielded elements, indicative of scattered radiation intensity; and correcting for scatter by subtracting scatter intensity values estimated from said measured scatter signals from signals measured by unshielded detector elements.Type: GrantFiled: June 8, 2009Date of Patent: December 13, 2011Assignee: Arineta Ltd.Inventors: David Ruimi, Olga Shapiro, Ehud Dafni
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Publication number: 20110116697Abstract: A method of correcting CT numbers in image data includes selecting at least one reference region in a CT image, wherein the selected region is a region associated with substantially same CT number when no artifacts are present in the CT image, estimating artifacts in at least one other region of the CT image based at least in part on detected CT numbers in the at least one reference region, and correcting CT numbers in the at least one other region of the CT image based on the estimated artifacts.Type: ApplicationFiled: November 16, 2010Publication date: May 19, 2011Applicant: Arineta Ltd.Inventors: Ehud DAFNI, David Ruimi
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Publication number: 20110064190Abstract: A CT scanner with scatter correction device and a method for scatter correction are provided. The method comprises positioning shields for shielding some of the CT detector elements from direct X ray radiation, while allowing scattered radiation to arrive at said shielded elements; measuring scatter signals from said shielded elements, indicative of scattered radiation intensity; and correcting for scatter by subtracting scatter intensity values estimated from said measured scatter signals from signals measured by unshielded detector elements.Type: ApplicationFiled: May 7, 2009Publication date: March 17, 2011Inventors: David Ruimi, Olga Shapiro, Ehud Dafni
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Publication number: 20110033024Abstract: A CT scanner comprises at least one cone beam x-ray source assembly mounted on a gantry frame, the gantry frame rotatable about a rotation axis, the x-ray source assembly operable to emit a cone beam at an orientation with respect to the rotation axis, and a controller operable to adjust an orientation of the cone beam during a rotation cycle of the gantry, wherein the controller adjusts the orientation to radiate a substantially same volume of interest over the rotation cycle.Type: ApplicationFiled: April 6, 2009Publication date: February 10, 2011Applicant: Arineta Ltd.Inventors: Ehud Dafni, Rafi Brada, David Ruimi
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Publication number: 20110007878Abstract: Disclosed is a collimator assembly for a multi-radiation-source medical imaging system (e.g. CT) and a medical imaging system utilizing the collimator. According to some embodiments of the present invention, there is provided a collimator assembly including at least two apertures, which apertures are adjustable substantially synchronously by one or more actuators.Type: ApplicationFiled: March 12, 2009Publication date: January 13, 2011Inventors: Ehud Dafni, David Ruimi
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Publication number: 20100195802Abstract: The invention is directed to an x-ray flux management device that adaptively attenuates an x-ray beam to limit the incident flux reaching a subject and radiographic detectors in potentially high-flux areas while not affecting the incident flux and detector measurements in low-flux regions. While the invention is particularly well-suited for CT, the invention is also applicable with other x-ray imaging systems. In addition to reducing the required detector system dynamic range, the present invention provides an added advantage of reducing radiation dose.Type: ApplicationFiled: April 7, 2010Publication date: August 5, 2010Inventors: Jerome S. Arenson, David Ruimi, Oded Meirav, Robert H. Armstrong
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Publication number: 20100195804Abstract: A method for calibration of a CT scanner having an x-ray source and a detector having an axial extent in the scanner, the source being rotatable about an epicenter between the source and detector, the method comprising: sequentially positioning a phantom having a non-circular cross section and a length commensurate with the extent of the detector at a plurality of positions between the X ray source and detector array of said CT scanner or sequentially positioning a plurality of phantoms each having a non-circular cross section and a length commensurate with the extent of the detector at a plurality of positions between the X ray source and detector array of said CT scanner; or sequentially positioning a same phantom having a length commensurate with the extent of the detector at a plurality of positions between the X ray source and detector array of said CT scanner or sequentially positioning a plurality of essentially similar phantoms and a length commensurate with the extent of the detector at a pluralitType: ApplicationFiled: February 2, 2010Publication date: August 5, 2010Applicant: Arineta Ltd.Inventors: Ehud DAFNI, Olga Shapiro, David Ruimi
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Patent number: 7706508Abstract: The invention is directed to an x-ray flux management device that adaptively attenuates an x-ray beam to limit the incident flux reaching a subject and radiographic detectors in potentially high-flux areas while not affecting the incident flux and detector measurements in low-flux regions. While the invention is particularly well-suited for CT, the invention is also applicable with other x-ray imaging systems. In addition to reducing the required detector system dynamic range, the present invention provides an added advantage of reducing radiation dose.Type: GrantFiled: October 12, 2007Date of Patent: April 27, 2010Assignee: General Electric CompanyInventors: Jerome Stephen Arenson, David Ruimi, Oded Meirav, Robert Harry Armstrong
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Patent number: 7649974Abstract: Methods and systems for controlling an X-ray imaging system. The method for controlling an X-ray imaging system includes acquiring a plurality of subviews of patient attenuation data wherein a first set of subviews of patient attenuation data is acquired at a first radiation flux level and a second set of subviews of patient attenuation data is acquired at a second radiation flux level. The first radiation flux level is different than the second radiation flux level. The method further includes combining the first set of subviews of patient attenuation data and the second set of subviews of patient attenuation data to form corrected views for subsequent image generation.Type: GrantFiled: November 18, 2004Date of Patent: January 19, 2010Assignee: General Electric CompanyInventors: Jerome Stephen Arenson, David Ruimi, Oded Meirav, Robert Harry Armstrong
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Publication number: 20090304142Abstract: A CT scanner with scatter correction device and a method for scatter correction are provided. The method of correcting CT images from artifacts caused by scattered radiation comprises affixing to the non-rotating frame of the CT gantry a plurality of shields for shielding some of the CT detector elements from direct X ray radiation, while allowing scattered radiation to arrive at said shielded elements; measuring scatter signals from said shielded elements, indicative of scattered radiation intensity; and correcting for scatter by subtracting scatter intensity values estimated from said measured scatter signals from signals measured by unshielded detector elements.Type: ApplicationFiled: June 8, 2009Publication date: December 10, 2009Inventors: David RUIMI, Olga Shapiro, Ehud Dafni