Gantry image guided radiotherapy system and related treatment delivery methods
Granted: June 11, 2019
Patent Number:
10315050
A method of image guided radiation treatment (IGRT) is described. The method may include receiving a pre-acquired image data set of the body part acquired in a reference frame generally independent of a reference frame of an IGRT apparatus, processing a first population of x-ray cone beam projection images to compute therefrom a first tomosynthesis image volume; and operating a radiation treatment head of the IGRT apparatus to deliver treatment radiation to the body part based at least…
Systems and methods for selecting a radiation therapy treatment plan
Granted: June 4, 2019
Patent Number:
10307614
A method of selecting a radiation therapy treatment plan for a patient. The treatment plan is implemented through a radiation delivery system including a gantry capable of rotating around a couch, in which the couch is movable in a linear direction relative to the gantry. The movement of the couch and the gantry creates a helical delivery path having a pitch. A radiation module delivers a radiation beam, where the beam has a beam weight corresponding to a radiation fluence. The method…
Radiation treatment planning using four-dimensional imaging data
Granted: May 7, 2019
Patent Number:
10279196
A method and apparatus for treatment planning using four dimensional imaging data.
Two-dimensional x-ray imaging of a target volume
Granted: January 8, 2019
Patent Number:
10173078
Methods of two-dimensional x-ray imaging of a target volume and tracking a target structure contained within a target volume are described.
Presenting a sequence of images associated with a motion model
Granted: September 4, 2018
Patent Number:
10065049
Images that are associated with an identification of a tracking target of a patient to receive radiation treatment may be received. The images may be sorted into a sequence based on a motion of the patient. The sorted images may be provided via a graphical user interface. The sequence of the sorted images that are based on the motion of the patient may be provided.
Automatic correlation modeling of an internal target
Granted: August 14, 2018
Patent Number:
10046178
A method and apparatus to automatically control the timing of an image acquisition by an imaging system in developing a correlation model of movement of a target within a patient.
Treatment planning software and corresponding user interface
Granted: June 12, 2018
Patent Number:
9993662
A method and apparatus for treatment planning are described.
Manipulation of a respiratory model via adjustment of parameters associated with model images
Granted: June 5, 2018
Patent Number:
9990711
Imaging data including images associated with a patient may be received. A subset of the images that are used with a model that is associated with the position and motion of a targeted region of the patient to receive radiation treatment may be identified. The subset of images may be sorted. A graphical user interface (GUI) that identifies two or more of the images of the sorted subset may be provided. A selection associated with one of the images of the sorted subset may be received by…
Image-based aperture verification system for multi-leaf collimator
Granted: April 24, 2018
Patent Number:
9950193
A radiation delivery system includes a multi-leaf collimator (MLC) that includes a housing, a plurality of leaves disposed within the housing, and an image sensor disposed within the housing at a position that is offset from a beam axis. The plurality of leaves are movable to define an aperture for the MLC, and the image sensor is directed toward the plurality of leaves. The image sensor is to generate an oblique-view image of the aperture. The radiation delivery system additionally…
Tracking a target structure contained within a target volume using an X-ray tomosynthesis imaging detector
Granted: April 17, 2018
Patent Number:
9943707
Tracking a target structure contained within a target volume using an x-ray tomosynthesis imaging detector is described.
Verification of leaf positions for multi-leaf collimator using multiple verification systems
Granted: April 17, 2018
Patent Number:
9943705
A method includes determining a first estimate of leaf positions for a plurality of leaves of a multi-leaf collimator (MLC) in a reference coordinate space based on an image generated by an image-based aperture verification system, wherein the leaf positions for the plurality of leaves define an aperture for the MLC. The method further includes determining a second estimate of the leaf positions for the plurality of leaves in the reference coordinate space based on data from an…
Imaging methods for image-guided radiation treatment
Granted: February 20, 2018
Patent Number:
9895555
An IGRT system and methods are described embodiments of which perform selectively integration of x-ray source arrays, dual-energy imaging, stereoscopic imaging, static and source collimation, or inverse geometry tomosynthesis imaging to acquire or track a target during radiation treatment.
Fiducial localization
Granted: February 6, 2018
Patent Number:
9883818
Fiducial localization methods and apparatus are described.
Ambient light suppression using color space information to derive pixel-wise attenuation factors
Granted: September 26, 2017
Patent Number:
9774838
A method of ambient light suppression in an imaging system, including illuminating leaves of a multi-leaf collimator (MLC) with a first light of a lighting system inside a housing of the MCL, receiving ambient light inside the housing of the MLC through an aperture of the MLC, and capturing, using an imaging system having optics situated inside the housing of the MLC, an image of the leaves of the MLC illuminated with the first light and the ambient light. The method may further include,…
Rotatable gantry radiation treatment system
Granted: July 11, 2017
Patent Number:
9700740
A radiation treatment apparatus is described. The radiation treatment apparatus may include a gantry frame and a rotatable gantry structure rotatably coupled to the gantry frame, the rotatable gantry structure being rotatable around a rotation axis passing through an isocenter, with the rotatable gantry structure including a first beam member extending between first and second ends of the rotatable gantry structure. The radiation treatment apparatus may also include a radiation treatment…
Radiation treatment delivery system with translatable ring gantry
Granted: June 27, 2017
Patent Number:
9687200
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…
Frameless radiosurgery treatment system and method
Granted: February 21, 2017
Patent Number:
9572997
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…
Tracking of moving targets
Granted: October 25, 2016
Patent Number:
9474914
Treatment targets such as tumors or lesions, located within an anatomical region that undergoes motion (which may be periodic with cycle P) are tracked. A 4D mathematical model may be 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 non-rigid image…
Electromagnetically actuated multi-leaf collimator
Granted: September 13, 2016
Patent Number:
9443633
A multi-leaf collimator with electromagnetically actuated leaves. The multi-leaf collimator includes a plurality of leaves, a leaf guide configured to support the plurality of leaves, and a plurality of magnets. Each leaf includes a blocking portion that is radio opaque, a drive portion connected to the blocking portion, and a coil embedded in the drive portion. The coil is operatively connected to an electrical current source to generate a first magnetic field. The first magnetic field…
Non-invasive method for using 2D angiographic images for radiosurgical target definition
Granted: August 30, 2016
Patent Number:
9427201
A non-invasive method and system for using 2D angiographic images for radiosurgical target definition uses non-invasive calibration devices and methods to calibrate an angiographic imaging system and a six-parameter registration algorithm to register angiographic images with 3D scan data for radiation treatment planning.
