Patents Assigned to Vision RT Limited
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Publication number: 20190255358Abstract: A multi-purpose object for calibrating, monitoring and/or tracking a patient in a treatment system and/or a treatment planning system is described, the multi-purpose object being made of transparent material and defining an internal space having one or more targets, wherein an upper surface is coated so as to define a pattern of transparent markings. The interior of the multi-purpose object can be back lit to present a high contrast surface image for a patient treatment, tracking or monitoring system.Type: ApplicationFiled: February 15, 2019Publication date: August 22, 2019Applicant: Vision RT LimitedInventors: Gideon M. HALE, James Benjamin WAGHORN
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Publication number: 20190247677Abstract: Some embodiments are directed to an image director of a patient monitoring system to obtain calibration images of a calibration sheet or other calibration object at various orientations and locations. The images are then stored and processed to calculate camera parameters defining the location and orientation of the image detector and identifying internal characteristics of the image detector, and the information are stored. The patient monitoring system can be re-calibrated by using the image detector to obtain an additional image of a calibration sheet or calibration object. The additional image and the stored camera parameters are then used to detect any apparent change in the internal characteristics of the image detector (10)(S6-4).Type: ApplicationFiled: April 26, 2019Publication date: August 15, 2019Applicant: VISION RT LIMITEDInventors: Edward William MEAD, Ivan Daniel MEIR
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Patent number: 10315054Abstract: Some embodiments are directed to an image director of a patient monitoring system to obtain calibration images of a calibration sheet or other calibration object at various orientations and locations. The images are then stored and processed to calculate camera parameters defining the location and orientation of the image detector and identifying internal characteristics of the image detector, and the information are stored. The patient monitoring system can be re-calibrated by using the image detector to obtain an additional image of a calibration sheet or calibration object. The additional image and the stored camera parameters are then used to detect any apparent change in the internal characteristics of the image detector (10) (S6-4).Type: GrantFiled: November 9, 2015Date of Patent: June 11, 2019Assignee: VISION RT LIMITEDInventors: Edward William Mead, Ivan Daniel Meir
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Publication number: 20190134426Abstract: Images obtained by a camera system (10) arranged to obtain images of a patient (20) undergoing radio-therapy are processed by a modeling unit (56,58) which generates a model of the surface of a patient (20) being monitored. Additionally the patient monitoring system processes image data not utilized to generate a model of the surface of a patient being monitored to determine further information concerning the treatment of the patient (20). Such additional data can comprise data identifying the relative location of the patient and a treatment apparatus (16). This can be facilitated by providing a number or retro-reflective markers (30-40) on a treatment apparatus (16) and a mechanical couch (18) used to position the patient (20) relative to the treatment apparatus (16) and monitoring the presence and location of the markers in the portions of the images obtained by the stereoscopic camera (10).Type: ApplicationFiled: December 21, 2018Publication date: May 9, 2019Applicant: VISION RT LIMITEDInventors: Ivan MEIR, Kathryn COOPER, Norman SMITH, Gideon HALE, Martin ALLEN
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Publication number: 20190083004Abstract: A patient monitor is disclosed for detecting patient movement or abnormal breathing. Images of a patient are obtained by a stereoscopic camera. These images are then processed by a 3D position determination module which determines measurements indicative of positions of at least part of a patient. The obtained measurements are then passed to a model generation module which generates a breathing model of the variation in position of the at least part of a patient during a breathing cycle. Subsequently abnormal breathing or patient movement can be detected by processing further images obtained by the stereoscopic camera to determine more measurements indicative of positions of at least part of a patient. These measurements are then compared with a stored breathing model by a comparison module.Type: ApplicationFiled: November 20, 2018Publication date: March 21, 2019Applicant: VISION RT LIMITEDInventors: Ivan Daniel MEIR, Norman Ronald SMITH, Anthony Christopher RUTO
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Patent number: 10183177Abstract: Images obtained by a camera system (10) arranged to obtain stereoscopic images of a patient (20) undergoing radio-therapy are processed by a modeling unit (56,58) which generates a model of the surface of a patient (20) being monitored. Additionally the patient monitoring system processes image data not utilized to generate a model of the surface of a patient being monitored to determine further information concerning the treatment of the patient (20). Such additional data can comprise data identifying the relative location of the patient and a treatment apparatus (16). This can be facilitated by providing a number or retro-reflective markers (30-40) on a treatment apparatus (16) and a mechanical couch (18) used to position the patient (20) relative to the treatment apparatus (16) and monitoring the presence and location of the markers in the portions of the images obtained by the stereoscopic camera (10).Type: GrantFiled: October 11, 2013Date of Patent: January 22, 2019Assignee: VISION RT LIMITEDInventors: Ivan Meir, Kathryn Cooper, Norman Smith, Gideon Hale, Martin Allen
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Patent number: 10154803Abstract: A patient monitor is disclosed for detecting patient movement or abnormal breathing. Images of a patient are obtained by a stereoscopic camera. These images are then processed by a 3D position determination module which determines measurements indicative of positions of at least part of a patient. The obtained measurements are then passed to a model generation module which generates a breathing model of the variation in position of the at least part of a patient during a breathing cycle. Subsequently abnormal breathing or patient movement can be detected by processing further images obtained by the stereoscopic camera to determine more measurements indicative of positions of at least part of a patient. These measurements are then compared with a stored breathing model by a comparison module.Type: GrantFiled: April 16, 2015Date of Patent: December 18, 2018Assignee: VISION RT LIMITEDInventors: Ivan Daniel Meir, Norman Ronald Smith, Anthony Christopher Ruto
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Path planning and collision avoidance for movement of instruments in a radiation therapy environment
Patent number: 10010720Abstract: Apparatus and methods for therapy delivery are disclosed. In one embodiment, a therapy delivery system includes a plurality of movable components including a radiation therapy nozzle and a patient pod for holding a patient, a patient registration module for determining a desired position of at least one of the plurality of movable components, and a motion control module for coordinating the movement of the least one of the plurality of movable components from a current position to the desired position. The motion control module includes a path planning module for simulating at least one projected trajectory of movement of the least one of the plurality of moveable components from the current position to the desired position.Type: GrantFiled: January 25, 2016Date of Patent: July 3, 2018Assignee: VISION RT LIMITEDInventors: Chieh C. Cheng, David A. Lesyna, Michael F. Moyers -
Patent number: 9962561Abstract: Some embodiments are directed to a calibration method including a calibration phantom positioned on an adjustable table on the surface of a mechanical couch, with the phantom's center at an estimated location for the iso-center of a radio therapy treatment apparatus. The calibration phantom is then irradiated using the apparatus, and the relative location of the center of the calibration phantom and the iso-center of the apparatus is determined by analyzing images of the irradiation. The calibration phantom is then repositioned by the mechanical couch applying an offset corresponding to the determined relative location of the center of the calibration phantom and the iso-center of the apparatus to the calibration phantom. Images of the relocated calibration phantom are obtained, and the images are processed to set the co-ordinate system of a 3D camera system relative to the iso-center of the apparatus.Type: GrantFiled: July 11, 2014Date of Patent: May 8, 2018Assignee: VISION RT LIMITEDInventors: Ivan Meir, Martin Allen, Gideon Hale, Norman Smith, Robert Howe
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Patent number: 9736465Abstract: An exemplary embodiment of a 3D camera system for a patient positioning and monitoring system is described. In the system a pair of image detectors are provided where the image detectors are each associated with a heater thermally connected to conducting pads provided at the periphery of the image detectors. The heaters and conducting pads act to contain the image detectors in a substantially constant temperature micro climate thereby preventing external temperature variations from causing the relative positions of the image detectors to change so as to record portions of images as different pixels and hence reduce the consistency with which the identification of matching portions of images obtained by the image detectors can be utilized to determine the 3D positions of imaged objects.Type: GrantFiled: April 25, 2013Date of Patent: August 15, 2017Assignee: VISION RT LIMITEDInventors: Peter Hanson, Gideon Hale
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Patent number: 9731150Abstract: Some embodiments are directed to a radiation dosage monitoring system including a model generation module configured to generate a 3D surface model of a portion of a patient undergoing radiation treatment, an image detector configured to detect Cherenkov radiation and any subsequent secondary and scattered radiation originating due to the initial Cherenkov radiation emitted from the patient, a processing module configured to determine estimations of radiation applied to the patient utilizing the images from the image detector and the 3D model, and to utilize the determined estimations of radiation applied to the patient together with data indicative of the orientation of a radiation beam inducing emission of the Cherenkov radiation at a time when the radiation beam was applied to generate a 3D internal representation of the location of the portions of a irradiated patient resulting in the emission of the Cherenkov radiation.Type: GrantFiled: April 2, 2016Date of Patent: August 15, 2017Assignee: VISION RT LIMITEDInventors: Gideon Matthew Hale, Ivan Daniel Meir, Todd Pawlicki, Martin Allen
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Path planning and collision avoidance for movement of instruments in a radiation therapy environment
Patent number: 9623263Abstract: Apparatus and methods for therapy delivery are disclosed. In one embodiment, a therapy delivery system includes a plurality of movable components including a radiation therapy nozzle and a patient pod for holding a patient, a patient registration module for determining a desired position of at least one of the plurality of movable components, and a motion control module for coordinating the movement of the least one of the plurality of movable components from a current position to the desired position. The motion control module includes a path planning module for simulating at least one projected trajectory of movement of the least one of the plurality of moveable components from the current position to the desired position.Type: GrantFiled: June 6, 2014Date of Patent: April 18, 2017Assignee: VISION RT LIMITEDInventors: Chieh C. Cheng, David A. Lesyna, Michael F. Moyers -
Patent number: 9456947Abstract: A head positioning device for use in radio therapy is described for positioning a patient's head. The head positioning device comprises a head plate for supporting a patient's head; a base plate for connection to a mechanical couch; and a head plate adjustment assembly connecting the head plate to the base plate wherein the head plate adjustment assembly is arranged to vary the relative pitch, yaw and roll of the head plate relative to the base plate. The head positioning device is arranged to be attached to a mechanical couch with the head plate and the head plate adjustment assembly cantilevered off the end of the couch and the head plate adjustment assembly suspended beneath the head plate and the base plate.Type: GrantFiled: August 8, 2013Date of Patent: October 4, 2016Assignee: VISION RT LIMITEDInventors: Dana M Dawson, Umar M Baharom, Martin Allen, Norman R Smith
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Patent number: 9420254Abstract: A patient monitoring system can include stereoscopic cameras connected to a computer which includes a 3D position determination module operable to process stereoscopic images of a patient to identify 3D positions of a plurality of points on the surface of an imaged patient. A target model store can store a target model including data identifying 3D positions of a set of vertices of a triangulated 3D wire mesh model and connectivity indicative of connections between vertices. A matching module can identify the triangles in a target model surface stored in the target model store closest to points identified by the 3D position determination module and calculate a rigid transformation which minimizes point to plane distances between the identified points and the planes containing the triangles of the target model surface identified as being closest to those points.Type: GrantFiled: April 17, 2013Date of Patent: August 16, 2016Assignee: VISION RT LIMITEDInventor: Ivan Meir
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Patent number: 9028422Abstract: A patient monitor is disclosed for detecting patient movement or abnormal breathing. Images of a patient are obtained by a stereoscopic camera. These images are then processed by a 3D position determination module which determines measurements indicative of positions of at least part of a patient. The obtained measurements are then passed to a model generation module which generates a breathing model of the variation in position of the at least part of a patient during a breathing cycle. Subsequently abnormal breathing or patient movement can be detected by processing further images obtained by the stereoscopic camera to determine more measurements indicative of positions of at least part of a patient. These measurements are then compared with a stored breathing model by a comparison module.Type: GrantFiled: February 12, 2009Date of Patent: May 12, 2015Assignee: Vision RT LimitedInventors: Ivan Daniel Meir, Norman Ronald Smith, Anthony Christopher Ruto
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Patent number: 8662083Abstract: A blank for a head restraint is disclosed. The blank includes a frame and a sheet extending across the frame wherein a main aperture and a pair of auxiliary apertures are provided in the sheet. The arrangement of the apertures is such that when the sheet is deformed upon placement on a patient's head, the main aperture is such to leave a patient's face substantially free of the sheet and the auxiliary apertures are such to cause a retaining strut to be formed by portions of the sheet between the main aperture and the auxiliary apertures.Type: GrantFiled: January 22, 2010Date of Patent: March 4, 2014Assignee: Vision RT LimitedInventors: Ivan D Meir, James O Turner
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Patent number: 8135201Abstract: Three camera rigs are connected by wiring to a computer. The computer is also connected to a treatment apparatus. A mechanical couch is provided as part of the treatment apparatus such that under the control of the computer the relative positions of the mechanical couch and the treatment apparatus may be varied. The camera rigs obtain video images of a patient lying on the mechanical couch the computer processes these images to generate a three-dimensional model of the surface of the patient which is utilized to position the patient relative to the treatment apparatus.Type: GrantFiled: January 10, 2011Date of Patent: March 13, 2012Assignee: Vision RT LimitedInventors: Norman Ronald Smith, Ivan Daniel Meir, Gideon Matthew Hale, Robert Edward Howe
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Publication number: 20120006336Abstract: A blank for a head restraint is disclosed. The blank includes a frame and a sheet extending across the frame wherein a main aperture and a pair of auxiliary apertures are provided in the sheet. The arrangement of the apertures is such that when the sheet is deformed upon placement on a patient's head, the main aperture is such to leave a patient's face substantially free of the sheet and the auxiliary apertures are such to cause a retaining strut to be formed by portions of the sheet between the main aperture and the auxiliary apertures.Type: ApplicationFiled: January 22, 2010Publication date: January 12, 2012Applicant: VISION RT LIMITEDInventors: Ivan D. Meir, James O. Turner
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Publication number: 20110178783Abstract: Three camera rigs are connected by wiring to a computer. The computer is also connected to a treatment apparatus. A mechanical couch is provided as part of the treatment apparatus such that under the control of the computer the relative positions of the mechanical couch and the treatment apparatus may be varied. The camera rigs obtain video images of a patient lying on the mechanical couch the computer processes these images to generate a three-dimensional model of the surface of the patient which is utilized to position the patient relative to the treatment apparatus.Type: ApplicationFiled: January 10, 2011Publication date: July 21, 2011Applicant: Vision RT LimitedInventors: Norman Ronald Smith, Ivan Daniel Meir, Gideon Matthew Hale, Robert Edward Howe
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Patent number: 7889906Abstract: Three camera rigs are connected by wiring to a computer. The computer is also connected to a treatment apparatus. A mechanical couch is provided as part of the treatment apparatus such that under the control of the computer the relative positions of the mechanical couch and the treatment apparatus may be varied. The camera rigs obtain video images of a patient lying on the mechanical couch. The computer processes these images to generate a three-dimensional model of the surface of the patient relative to the treatment apparatus.Type: GrantFiled: July 8, 2003Date of Patent: February 15, 2011Assignee: Vision RT LimitedInventors: Norman Ronald Smith, Ivan Daniel Meir, Gideon Matthew Hale, Robert Edward Howe