Patents Assigned to Accuray, Inc.
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Patent number: 11166690Abstract: An imaging apparatus and associated methods are provided to receive measured projection data in a primary region and correct for scatter by processing the imaging data as two separate components: non-scatter-corrected data and scatter-only data. Separate image processing (e.g., reconstruction) allows for the use of individualized data processing, including filters, suited to the source data, thereby focusing on specific aspects of the source data, including, for example, noise and artifact reduction, resolution, edge preservation, etc. Combining the separately processed data results in an optimized balance of these aspects with improved image quality.Type: GrantFiled: March 19, 2020Date of Patent: November 9, 2021Assignee: Accuray, Inc.Inventors: Chuanyong Bai, Zhicong Yu, Amit Jain, Daniel Gagnon
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Patent number: 11160526Abstract: An x-ray imaging apparatus and associated methods are provided to receive measured projection data in a primary region and measured scatter data in a shadow region and determine an estimated scatter in the primary region during a current rotation based on the measured scatter data in the shadow region from a neighboring rotation. Coverage of the shadow region during the neighboring rotation overlaps the primary region during the current rotation. A beamformer is configured to adjust a shape of the radiation beam to create the primary and shadow regions on the detector, including an embodiment to follow the Tam-Danielson window during a helical scan.Type: GrantFiled: November 25, 2019Date of Patent: November 2, 2021Assignee: Accuray, Inc.Inventors: Zhicong Yu, Chuanyong Bai, Amit Jain, Daniel Gagnon
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Patent number: 11154269Abstract: Multimodal imaging apparatus and methods include a rotatable gantry system with multiple sources of radiation comprising different energy levels (for example, kV and MV). Fast slip-ring technology and helical scans allow data from multiple sources of radiation to be combined or utilized to generate improved images and workflows, including for IGRT. Features include increasing the precision of spatial registrations between respective image sets to allow more precise radiation treatment delivery, reducing image artifacts (e.g., scatter, metal and beam hardening, image blur, motion, etc.), and utilization of dual energy imaging (e.g., for material separation and quantitative imaging, patient setup, online adaptive IGRT, etc.).Type: GrantFiled: November 25, 2019Date of Patent: October 26, 2021Assignee: Accuray Inc.Inventors: Jacob Shea, Brandon Frederick, Eric Schnarr, Daniel Gagnon
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Patent number: 9258876Abstract: Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the width of the beam pulse, i.e., pulse width.Type: GrantFiled: December 22, 2010Date of Patent: February 9, 2016Assignee: Accuray, Inc.Inventors: Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
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Traveling wave linear accelerator based x-ray source using current to modulate pulse-to-pulse dosage
Patent number: 9167681Abstract: Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the electron beam current applied to an electron gun.Type: GrantFiled: December 22, 2010Date of Patent: October 20, 2015Assignee: Accuray, Inc.Inventors: Stephen W. Cheung, Roger H. Miller, Juwen Wang -
Patent number: 8989349Abstract: Treatment targets such as tumors or lesions, located within an anatomical region that undergoes motion (which may be periodic with cycle P), are dynamically tracked. A 4D mathematical model is established for the non-rigid motion and deformation of the anatomical region, from a set of CT or other 3D images. The 4D mathematical model relates the 3D locations of part(s) of the anatomical region with the targets being tracked, as a function of the position in time within P. Using fiducial-less non-rigid image registration between pre-operative DRRs and intra-operative x-ray images, the absolute position of the target and/or other part(s) of the anatomical region is determined. The cycle P is determined using motion sensors such as surface markers. The radiation beams are delivered using: 1) the results of non-rigid image registration; 2) the 4D model; and 3) the position in time within P.Type: GrantFiled: September 30, 2004Date of Patent: March 24, 2015Assignee: Accuray, Inc.Inventors: Euan Thomson, John Robinson Dooley, Gopinath Kuduvalli, James Wang, Eric Earnst, Chris Raanes
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Patent number: 8874187Abstract: Treatment targets such as tumors or lesions, located within an anatomical region that undergoes motion (which may be periodic with cycle P), are dynamically tracked. A 4D mathematical model is established for the non-rigid motion and deformation of the anatomical region, from a set of CT or other 3D images. The 4D mathematical model relates the 3D locations of part(s) of the anatomical region with the targets being tracked, as a function of the position in time within P. Using fiducial-less non-rigid image registration between pre-operative DRRs and intra-operative x-ray images, the absolute position of the target and/or other part(s) of the anatomical region is determined. The cycle P is determined using motion sensors such as surface markers. The radiation beams are delivered using: 1) the results of non-rigid image registration; 2) the 4D model; and 3) the position in time within P.Type: GrantFiled: August 7, 2007Date of Patent: October 28, 2014Assignee: Accuray Inc.Inventors: Euan Thomson, John Robinson Dooley, Gopinath Kuduvalli, James Wang, Eric Earnst, Chris Raanes
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Publication number: 20130315379Abstract: The disclosure relates to systems and methods for interleaving operation of a linear accelerator that use a magnetron as the source of electromagnetic waves for use in accelerating electrons to at least two different ranges of energies. The accelerated electrons can be used to generate x-rays of at least two different energy ranges. In certain embodiments, the accelerated electrons can be used to generate x-rays of at least two different energy ranges. The systems and methods are applicable to traveling wave linear accelerators.Type: ApplicationFiled: November 12, 2012Publication date: November 28, 2013Applicant: Accuray, Inc.Inventor: Accuray, Inc.
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Patent number: 8406851Abstract: An apparatus and method of tracking a patient using a virtual image.Type: GrantFiled: August 11, 2005Date of Patent: March 26, 2013Assignee: Accuray Inc.Inventors: Jay B. West, Dongshan Fu
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Publication number: 20130063052Abstract: The disclosure relates to systems and methods for interleaving operation of a standing wave linear accelerator (LINAC) for use in providing electrons of at least two different energy ranges, which can be contacted with x-ray targets to generate x-rays of at least two different energy ranges. The LINAC can be operated to output electrons at different energies by varying the power of the electromagnetic wave input to the LINAC, or by using a detunable side cavity which includes an activatable window.Type: ApplicationFiled: September 11, 2012Publication date: March 14, 2013Applicant: Accuray, Inc.Inventors: Ching-Hung Ho, Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
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Patent number: 8384314Abstract: An electromagnetic wave having a phase velocity and an amplitude is provided by an electromagnetic wave source to a traveling wave linear accelerator. The traveling wave linear accelerator generates a first output of electrons having a first energy by accelerating an electron beam using the electromagnetic wave. The first output of electrons can be contacted with a target to provide a first beam of x-rays. The electromagnetic wave can be modified by adjusting its amplitude and the phase velocity. The traveling wave linear accelerator then generates a second output of electrons having a second energy by accelerating an electron beam using the modified electromagnetic wave. The second output of electrons can be contacted with a target to provide a second beam of x-rays. A frequency controller can monitor the phase shift of the electromagnetic wave from the input to the output ends of the accelerator and can correct the phase shift of the electromagnetic wave based on the measured phase shift.Type: GrantFiled: July 17, 2012Date of Patent: February 26, 2013Assignee: Accuray, Inc.Inventors: Paul Dennis Treas, Roger Heering Miller, Juwen Wang
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Publication number: 20130016889Abstract: An image registration process for detecting a change in position of a surgical target, such as a tumor, within a patient is disclosed. A pre-operative model of the target and surrounding area is generated, then registered to live patient images to determine or confirm a location of the target during the course of surgery. Image registration is based on a non-iterative image processing logic that compares a similarity measure for a template of the target (generated from the pre-operative model) at one location within the live image to other locations within the live image.Type: ApplicationFiled: July 14, 2011Publication date: January 17, 2013Applicant: ACCURAY, INC.Inventors: Andriy Myronenko, Petr Jordan, Jay Bailey West
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Patent number: 8311187Abstract: The disclosure relates to systems and methods for interleaving operation of a linear accelerator that use a magnetron as the source of electromagnetic waves for use in accelerating electrons to at least two different ranges of energies. The accelerated electrons can be used to generate x-rays of at least two different energy ranges. In certain embodiments, the accelerated electrons can be used to generate x-rays of at least two different energy ranges. The systems and methods are applicable to traveling wave linear accelerators.Type: GrantFiled: January 29, 2010Date of Patent: November 13, 2012Assignee: Accuray, Inc.Inventors: Paul Dennis Treas, Roger Heering Miller
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Patent number: 8284898Abstract: The disclosure relates to systems and methods for interleaving operation of a standing wave linear accelerator (LINAC) for use in providing electrons of at least two different energy ranges, which can be contacted with x-ray targets to generate x-rays of at least two different energy ranges. The LINAC can be operated to output electrons at different energies by varying the power of the electromagnetic wave input to the LINAC, or by using a detunable side cavity which includes an activatable window.Type: GrantFiled: March 5, 2010Date of Patent: October 9, 2012Assignee: Accuray, Inc.Inventors: Ching-Hung Ho, Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
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Patent number: 8232748Abstract: An electromagnetic wave having a phase velocity and an amplitude is provided by an electromagnetic wave source to a traveling wave linear accelerator. The traveling wave linear accelerator generates a first output of electrons having a first energy by accelerating an electron beam using the electromagnetic wave. The first output of electrons can be contacted with a target to provide a first beam of x-rays. The electromagnetic wave can be modified by adjusting its amplitude and the phase velocity. The traveling wave linear accelerator then generates a second output of electrons having a second energy by accelerating an electron beam using the modified electromagnetic wave. The second output of electrons can be contacted with a target to provide a second beam of x-rays. A frequency controller can monitor the phase shift of the electromagnetic wave from the input to the output ends of the accelerator and can correct the phase shift of the electromagnetic wave based on the measured phase shift.Type: GrantFiled: October 16, 2009Date of Patent: July 31, 2012Assignee: Accuray, Inc.Inventors: Paul Dennis Treas, Roger Heering Miller, Juwen Wang
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Patent number: 8203289Abstract: The disclosure relates to systems and methods for fast-switching operating of a standing wave linear accelerator (LINAC) for use in generating x-rays of at least two different energy ranges with advantageously low heating of electronic switches. In certain embodiments, the heating of electronic switches during a fast-switching operation of the LINAC can be kept advantageously low through the controlled, timed activation of multiple electronic switches located in respective side cavities of the standing wave LINAC, or through the use of a modified a side cavity that includes an electronic switch.Type: GrantFiled: July 8, 2009Date of Patent: June 19, 2012Assignee: Accuray, Inc.Inventors: Ching-Hung Ho, Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
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Publication number: 20120081041Abstract: Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the width of the beam pulse, i.e., pulse width.Type: ApplicationFiled: December 22, 2010Publication date: April 5, 2012Applicant: ACCURAY, INC.Inventors: Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
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TRAVELING WAVE LINEAR ACCELERATOR BASED X-RAY SOURCE USING CURRENT TO MODULATE PULSE-TO-PULSE DOSAGE
Publication number: 20120081042Abstract: Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the electron beam current applied to an electron gun.Type: ApplicationFiled: December 22, 2010Publication date: April 5, 2012Applicant: ACCURAY, INC.Inventors: Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang -
Publication number: 20120035470Abstract: Systems, methods, and related computer program products for image-guided radiation treatment (IGRT) are described. For one preferred embodiment, an IGRT apparatus is provided comprising a gantry frame including a ring member, the ring member being rotatable around a substantially horizontal, longitudinally extending central axis, the ring member having first and second horizontally opposing ends. The IGRT apparatus further comprises a radiation treatment head coupled to the ring member by an arm member, the arm member being connected to the ring member at an arm member base. Preferably, the IGRT apparatus is further characterized in that the arm member extends outwardly from the first end of the ring member in a direction away from the second end and is supported only by the arm member base, and the radiation treatment head is dynamically movable in at least a longitudinal direction toward and away from the first end of the ring member.Type: ApplicationFiled: August 8, 2011Publication date: February 9, 2012Applicant: ACCURAY, INC.Inventors: Gopinath Kuduvalli, Paul D. Treas, Adam J. Weber
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Publication number: 20120008735Abstract: Systems, methods, and related computer program products for medical imaging and image-guided radiation treatment (IGRT) are described. In one embodiment, an IGRT system selectively integrates x-ray source arrays, dual-energy imaging, stereoscopic imaging, static and dynamic source collimation, and/or inverse geometry tomosynthesis imaging to acquire and/or track a target during radiation treatment. Advantages include reduced patient x-ray dose and/or reduced treatment delivery margins.Type: ApplicationFiled: June 8, 2011Publication date: January 12, 2012Applicant: ACCURAY, INC.Inventors: Calvin R. Maurer, Mu Young Lee, Gopinath Kuduvalli, Petr Jordan, Prashant Chopra