ACCURAY INCORPORATED Patent applications |
Patent application number | Title | Published |
20140107477 | FRAMELESS RADIOSURGERY TREATMENT SYSTEM AND METHOD - A method of compensating for breathing and other motions of a patient during treatment includes periodically generating internal positional data about an internal target region. The method further includes generating external positional data about external motion of the patient's body using an external sensor and generating a correlation between one or more positions of the internal target region and one or more positions of an external region using the external positional data of the external sensor and the internal positional data of the internal target region. The method further includes predicting the position of the internal target region at some later time based on the correlation model. | 04-17-2014 |
20120189102 | Ring Gantry Radiation Treatment Delivery System With Dynamically Controllable Inward Extension Of Treatment Head - 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 ring gantry having a central opening sufficiently large to accommodate a body of a patient positioned along a longitudinal axis and extending therethrough, and a gantry tilting mechanism configured to tilt the ring gantry to a plurality of different tilt angles relative to the longitudinal axis. A radiation treatment head is coupled to the ring gantry and is rotatable around said central opening in at least a 180 degree arc. The radiation treatment head is mechanically coupled to the ring gantry such that a distance by which the radiation treatment head extends inwardly toward the central opening relative to the ring gantry is dynamically controllable. | 07-26-2012 |
20120069968 | IMAGE ALIGNMENT - A method and apparatus for positioning a patient for radiation treatment are described. The method includes obtaining a plurality of projection images of a patient positioned on a treatment couch, displaying at least one of the plurality of projection images with a corresponding synthetic projection image on a display, adjusting the position of the at least one projection image on the display to approximately align with the corresponding synthetic projection image in response to a user dragging the at least one projection image on the display with a user interface device, and moving the treatment couch to position the patient based on position adjustments of the at least one projection image. | 03-22-2012 |
20110301449 | Radiation Treatment Delivery System With Translatable Ring Gantry - 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 ring gantry having a central opening and a radiation treatment head coupled to the ring gantry that is rotatable around the central opening in at least a 180 degree arc. For one preferred embodiment, the apparatus further comprises a gantry translation mechanism configured to translate the ring gantry in a direction of a longitudinal axis extending through the central opening. Noncoplanar radiation treatment delivery can thereby be achieved without requiring movement of the patient. For another preferred embodiment, an independently translatable 3D imaging device distinct from the ring gantry is provided for further achieving at least one of pre-treatment imaging and setup imaging of the target tissue volume without requiring movement of the patient. | 12-08-2011 |
20110211665 | Gantry Image Guided Radiotherapy System And Related Treatment Delivery Methods - Systems, methods, and related computer program products for image-guided radiation treatment (IGRT) are described. Provided according to one preferred embodiment is an IGRT apparatus including a barrel-style rotatable gantry structure that provides high mechanical stability, versatility in radiation delivery, and versatility in target tracking. Methods for treatment radiation delivery using the IGRT apparatus include conical non-coplanar rotational arc therapy and cono-helical non-coplanar rotational arc therapy. A radiation treatment head (MV source) and a treatment guidance imaging system including a kV imaging source are mounted to and rotatable with a common barrel-style rotatable gantry structure, or alternatively the MV and kV sources are mounted to separate barrel-style rotatable gantry structures independently rotatable around a common axis of rotation. Methods for intra-fraction target tracking in a gantry-style IGRT system based on comparisons between a pre-acquired planning image and intrafraction x-ray tomosynthesis images and/or intrafraction cone beam CT (CBCT) images are also described. | 09-01-2011 |
20110210261 | Gantry Image Guided Radiotherapy System And Related Treatment Delivery Methods - Systems, methods, and related computer program products for image-guided radiation treatment (IGRT) are described. Provided according to one preferred embodiment is an IGRT apparatus including a barrel-style rotatable gantry structure that provides high mechanical stability, versatility in radiation delivery, and versatility in target tracking. Methods for treatment radiation delivery using the IGRT apparatus include conical non-coplanar rotational arc therapy and cono-helical non-coplanar rotational arc therapy. A radiation treatment head (MV source) and a treatment guidance imaging system including a kV imaging source are mounted to and rotatable with a common barrel-style rotatable gantry structure, or alternatively the MV and kV sources are mounted to separate barrel-style rotatable gantry structures independently rotatable around a common axis of rotation. Methods for intra-fraction target tracking in a gantry-style IGRT system based on comparisons between a pre-acquired planning image and intrafraction x-ray tomosynthesis images and/or intrafraction cone beam CT (CBCT) images are also described. | 09-01-2011 |
20110160589 | DYNAMIC TRACKING OF SOFT TISSUE TARGETS WITH ULTRASOUND IMAGES - Apparatus and methods of dynamically tracking a soft tissue target with ultrasound images are described. An apparatus includes an ultrasound imager coupled to a robotic arm. A method includes acquiring a first ultrasound (US) image of a patient with an ultrasound imager, determining a quality metric of the first US image, and adjusting one or more imaging parameters of the ultrasound imager if the quality metric of the acquired first US image is less than a quality threshold. | 06-30-2011 |
20110116703 | TARGET TRACKING USING DIRECT TARGET REGISTRATION - Systems, methods and apparatus to detect a treatment target having motion in up to three translational directions using direct registration of the target and track the target to synchronize a treatment beam with the motion of the target. | 05-19-2011 |
20110050692 | INTERPOLATING AND RENDERING SUB-PHASES OF A 4D DATASET - A technique for rendering a deformable volume includes acquiring 3D images of a deformable volume including an object during phases of a deformation motion. The 3D images include voxels, a portion of which move from original coordinate locations during a primary phase to deformed coordinate locations during each subsequent phase of the deformation motion. Deformation matrixes each based upon one of the 3D images during a different one of the phases are generated. The deformation matrixes each include transformation vectors describing how to return the voxels from their deformed coordination locations to their original coordinate locations of the primary phase. A sub-phase 3D image of the deformable volume between consecutive phases is generated by interpolating between the transformation vectors of the consecutive phases associated with a given coordinate location within the deformable volume and retrieving voxel data from a primary 3D image at voxel locations referenced by interpolated transformation vectors. | 03-03-2011 |
20110019896 | PRECISION REGISTRATION OF X-RAY IMAGES TO CONE-BEAM CT SCAN FOR IMAGE-GUIDED RADIATION TREATMENT - A method for precision registration of X-ray images to cone-beam CT scan for image-guided radiosurgery includes acquiring 2-D pre-treatment X-ray images of a region of interest, acquiring a 2-D X-ray image of the region of interest at approximately a time of treatment, registering the 2-D X-ray image with a corresponding 2-D pre-treatment X-ray image to obtain a 2-D registration result at approximately the time of treatment, and converting the 2-D registration result into a 3-D tracking result to track the region of interest. | 01-27-2011 |
20100239153 | IMAGE GUIDED RADIOSURGERY METHOD AND APPARATUS USING REGISTRATION OF 2D RADIOGRAPHIC IMAGES WITH DIGITALLY RECONSTRUCTED RADIOGRAPHS OF 3D SCAN DATA - A set of 2D reconstructed images is generated from a pretreatment 3D scan showing an initial position of a target, wherein the set of 2D reconstructed images corresponds to perturbations from said initial position along fewer than six degrees of freedom. Said set of 2D reconstructed images are registered with one or more 2D x-ray images of said target showing a current position of the target, wherein the registering includes computing a set of 3D transformation parameters that represent a change in position of said target between said initial position of said pretreatment 3D scan and said current position of said 2D x-ray images along six degrees of freedom. A positioning system is instructed to adjust a relative position of a radiosurgical beam generator to said target by an amount prescribed by said 3D transformation parameters, wherein said target is allowed six degrees of freedom of position | 09-23-2010 |
20100183196 | DYNAMIC TRACKING OF SOFT TISSUE TARGETS WITH ULTRASOUND IMAGES, WITHOUT USING FIDUCIAL MARKERS - An apparatus and method of dynamically tracking a soft tissue target with ultrasound images, without the use of fiducial markers. In one embodiment, the apparatus includes an ultrasound imager to generate a reference ultrasound and a first ultrasound image having a soft tissue target, and a processing device coupled to the ultrasound imager to receive the reference ultrasound image and the first ultrasound image, to register the first ultrasound image with the reference ultrasound image, and to determine a displacement of the soft tissue target based on registration of the first ultrasound image with the reference ultrasound image. | 07-22-2010 |
20090257557 | Radiation Treatment Planning and Delivery for Moving Targets in the Heart - Method and systems are disclosed for radiating a moving target inside a heart. The method includes acquiring sequential volumetric representations of an area of the heart and defining a target tissue region and/or a radiation sensitive structure region in 3D for a first of the representations. The target tissue region and/or radiation sensitive structure region are identified for another of the representations by an analysis of the area of the heart from the first representation and the other representation. Radiation beams to the target tissue region are fired in response to the identified target tissue region and/or radiation sensitive structure region from the other representation. | 10-15-2009 |
20090252301 | METHOD AND APPARATUS FOR PATIENT LOADING AND UNLOADING - A method and apparatus of a positioning system are described to position an upper-half of a body relative to a head-end of a couch. The positioning system may be a patient positioning system and may include a treatment couch, a leg rest coupled to the treatment couch, and a drive mechanism coupled to the leg rest. The patient positioning system may also include a treatment couch, having a base portion of a treatment couch and plurality of detachable portions of the treatment couch. The plurality of detachable portions to adjust a height of the treatment couch to accommodate differing heights of patients. | 10-08-2009 |
20090092228 | IMAGING GEOMETRY FOR IMAGE-GUIDED RADIOSURGERY - A system and method for stereoscopically imaging a patient at multiple locations with a radiation treatment system using a common imaging center. | 04-09-2009 |