Accuray Patent Applications

FRAMELESS RADIOSURGERY TREATMENT SYSTEM AND METHOD

Granted: April 17, 2014
Application Number: 20140107477
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…

MAGNETRON POWERED LINEAR ACCELERATOR FOR INTERLEAVED MULTI-ENERGY OPERATION

Granted: November 28, 2013
Application Number: 20130315379
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…

INTERLEAVING MULTI-ENERGY X-RAY ENERGY OPERATION OF A STANDING WAVE LINEAR ACCELERATOR

Granted: March 14, 2013
Application Number: 20130063052
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…

Image Registration for Image-Guided Surgery

Granted: January 17, 2013
Application Number: 20130016889
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…

Ring Gantry Radiation Treatment Delivery System With Dynamically Controllable Inward Extension Of Treatment Head

Granted: July 26, 2012
Application Number: 20120189102
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…

TRAVELING WAVE LINEAR ACCELERATOR BASED X-RAY SOURCE USING PULSE WIDTH TO MODULATE PULSE-TO-PULSE DOSAGE

Granted: April 5, 2012
Application Number: 20120081041
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.

TRAVELING WAVE LINEAR ACCELERATOR BASED X-RAY SOURCE USING CURRENT TO MODULATE PULSE-TO-PULSE DOSAGE

Granted: April 5, 2012
Application Number: 20120081042
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.

IMAGE ALIGNMENT

Granted: March 22, 2012
Application Number: 20120069968
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…

RADIATION TREATMENT DELIVERY SYSTEM WITH OUTWARDLY MOVABLE RADIATION TREATMENT HEAD EXTENDING FROM RING GANTRY

Granted: February 9, 2012
Application Number: 20120035470
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…

Target Tracking for Image-Guided Radiation Treatment

Granted: January 12, 2012
Application Number: 20120008734
Systems, methods, and related computer program products for medical imaging and image-guided radiation treatment (IGRT) are described. In one preferred embodiment, an IGRT system provides intrafraction target tracking based on a comparison of intrafraction x-ray tomosynthesis image data with initial x-ray tomosynthesis image data acquired with the patient in an initial treatment position, the initial x-ray tomosynthesis image data having an inherent registration with co-acquired image…

Imaging Methods for Image-Guided Radiation Treatment

Granted: January 12, 2012
Application Number: 20120008735
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.

Radiation Treatment Delivery System With Translatable Ring Gantry

Granted: December 8, 2011
Application Number: 20110301449
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…

Gantry Image Guided Radiotherapy System And Related Treatment Delivery Methods

Granted: September 1, 2011
Application Number: 20110210261
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…

Gantry Image Guided Radiotherapy System And Related Treatment Delivery Methods

Granted: September 1, 2011
Application Number: 20110211665
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…

DYNAMIC TRACKING OF SOFT TISSUE TARGETS WITH ULTRASOUND IMAGES

Granted: June 30, 2011
Application Number: 20110160589
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.

TARGET TRACKING USING DIRECT TARGET REGISTRATION

Granted: May 19, 2011
Application Number: 20110116703
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.

DYNAMIC TRACKING OF MOVING TARGETS

Granted: April 21, 2011
Application Number: 20110092793
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…

INTERPOLATING AND RENDERING SUB-PHASES OF A 4D DATASET

Granted: March 3, 2011
Application Number: 20110050692
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…

PRECISION REGISTRATION OF X-RAY IMAGES TO CONE-BEAM CT SCAN FOR IMAGE-GUIDED RADIATION TREATMENT

Granted: January 27, 2011
Application Number: 20110019896
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…

PATIENT POSITIONING ASSEMBLY

Granted: November 4, 2010
Application Number: 20100275927
A patient positioning assembly is described. The patient positioning assembly including a plate member rotatably mounted on a base member, and an arm extending between a first end and a second end, wherein the first end is rotatably attached to the plate member. The patient positioning assembly further including a support device rotatably attached to the second end of the arm to support a patient thereon, with the support device is configured to move the patient in at least five degrees…