Binary multileaf collimator delivery with per-leaf field width
Granted: June 29, 2021
Patent Number:
11049627
A radiation treatment delivery system, includes a linear accelerator (LINAC) and a multileaf collimator (MLC), coupled with the distal end of the LINAC, wherein the MLC has two banks of leaves, organized into a plurality of opposing leaf pairs. The system further includes a processing device, operatively coupled to the LINAC and the MLC, to control the plurality of leaf pairs of the MLC such that for each of a plurality of radiation beam delivery positional sections corresponds to a…
Coordinated motion of a rotating 2D x-ray imager and a linear accelerator
Granted: December 15, 2020
Patent Number:
10863955
A method includes determining a first set of positions for a volumetric imager and determining a second set of positions for a linear accelerator (LINAC), during radiation treatment delivery. The method further includes determining a set of radiation beam directionalities of the LINAC, wherein for each of the second set of positions for the LINAC a radiation beam corresponds to a radiation beam directionality. The method further includes generating instructions for the volumetric imager…
Beam profile measurement system
Granted: December 8, 2020
Patent Number:
10857387
A beam profile measurement (BPM) system is described including a BPM phantom including a tank to house liquid, a dosimeter disposed in the tank to detect ionization of a radiation beam emitted from a linear accelerator (LINAC), and a positioning device to move the dosimeter in a vertical direction. The BPM system also includes a BPM controller to operably couple to the BPM phantom and the LINAC. A method is described including positioning, using a BPM controller, a dosimeter of the BPM…
Manipulation of a respiratory model via adjustment of parameters associated with model images
Granted: December 1, 2020
Patent Number:
10853940
A method and apparatus for manipulation of a respiratory model via adjustment of parameters associated with model images is described. A subset of the images that are used with the 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…
Image-guided radiation treatment with imaging data using imaging radiation at different energy levels
Granted: November 24, 2020
Patent Number:
10843010
A method of image-guided radiation treatment is described. The method may include acquiring digitally reconstructed radiographs (DRRs) of a patient and generating a first set of image data of part or all of the patient using imaging radiation at a first energy level and a second set of image data of part or all of the patient using imaging radiation at a second energy level. The method may also include processing the first and second sets of image data to generate an enhanced image,…
Detecting motion by using a low dose x-ray image
Granted: October 20, 2020
Patent Number:
10813205
A reference image of a patient may be generated. A subsequent x-ray image of the patient may be generated after the generating of the reference image where the subsequent x-ray image is associated with a low dosage. A difference between the reference image and the subsequent x-ray image that is associated with the low dosage may be determined. A motion of the patient may be identified as having occurred based on the determined difference.
Online angle selection in rotational imaging and tracking systems
Granted: October 20, 2020
Patent Number:
10806948
A radiation therapy apparatus determines a set of angles that have a tracking quality metric value that satisfies a tracking quality metric criterion. During an alignment phase or a treatment phase for a treatment stage of a target by the radiation therapy apparatus, the radiation therapy apparatus performs selects at least a first angle and a second angle from the set of angles for a first rotation of the gantry. The radiation therapy apparatus generates, using an imaging device mounted…
Binary multileaf collimator delivery with per-leaf field width
Granted: September 8, 2020
Patent Number:
10770196
A radiation treatment delivery system, includes a linear accelerator (LINAC) and a multileaf collimator (MLC), coupled with the distal end of the LINAC, wherein the MLC has two banks of leaves, organized into a plurality of opposing leaf pairs. The system further includes a processing device, operatively coupled to the LINAC and the MLC, to control the plurality of leaf pairs of the MLC such that for each of a plurality of radiation beam delivery positional sections corresponds to a…
Verification of leaf positions for multi-leaf collimator using multiple verification systems
Granted: September 1, 2020
Patent Number:
10758748
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…
Fast sliding window delivery via a high-speed multileaf collimator
Granted: August 25, 2020
Patent Number:
10751550
A system for delivering radiation dose, includes a gantry to move about a target to be irradiated and a radiation source mounted to the gantry and directed inward toward the target, The system further includes a collimator mounted to the gantry and in front of the radiation source, the collimator to shape a radiation beam directed at the target, wherein the collimator is to modulate a sub-beam intensity of the radiation beam across a plurality of sub-beams that subdivide a fluence field…
Using a rotating 2D X-ray imager as an imaging device to perform target tracking during radiation treatment delivery
Granted: August 25, 2020
Patent Number:
10751014
A method includes receiving, from a volumetric imager, a first image including a target of a patient. The method further includes receiving a second image including the target of the patient. The method further includes tracking, by a processing device, a position of the target using the first image and the second image.
Robotic arm for patient positioning assembly
Granted: August 18, 2020
Patent Number:
10745253
A robotic patient positioning assembly including a patient treatment couch, and a robotic arm coupled to the patient treatment couch. The robotic arm is configured to move the patient treatment couch along five rotational degrees of freedom and one substantially vertical, linear degree of freedom.
Image registration of treatment planning image, intrafraction 3D image, and intrafraction 2D x-ray image
Granted: July 14, 2020
Patent Number:
10713801
A method of the present disclosure includes performing, by a processing device, a first image registration between a reference image of a patient and a motion image of the patient to perform alignment between the reference image and the motion image, wherein the reference image and the motion image include a target position of the patient. The method further includes performing, by the processing device, a second image registration between the reference image and a motion x-ray image of…
Tumor tracking during radiation treatment using ultrasound imaging
Granted: July 7, 2020
Patent Number:
10702712
Systems and methods for tracking a target volume, e.g., tumor, in real-time during radiation treatment are provided. Under one aspect, a system includes an ultrasound probe, an x-ray imager, a processor, and a computer-readable medium that stores a 3D image of the tumor in a first reference frame and instructions for causing the processor to: instruct the x-ray imager and ultrasound probe to substantially simultaneously obtain inherently registered x-ray and set-up ultrasound images of…
Bremsstrahlung target for radiation therapy system
Granted: April 28, 2020
Patent Number:
10636609
Described herein is a medical accelerator target including a target constructed of a material having an atomic number that is greater than or equal to 40 or having a thickness of less than 0.2 radiation lengths.
Radiation treatment delivery system with translatable ring gantry
Granted: April 7, 2020
Patent Number:
10610175
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…
Tracking during radiation treatment using ultrasound imaging
Granted: March 31, 2020
Patent Number:
10603512
Systems and methods for tracking a target volume, e.g., tumor, during radiation treatment are provided. Under one aspect, a system includes an ultrasound probe, an x-ray imager, a processor, and a computer-readable medium that stores a 3D image of the tumor in a first reference frame and instructions to cause the processor to: instruct the x-ray imager and ultrasound probe to substantially simultaneously obtain inherently registered x-ray and set-up ultrasound images of the tumor in a…
Radiation based treatment beam position calibration and verification
Granted: February 25, 2020
Patent Number:
10569105
A method is described, including acquiring, using a camera, an image of a radiation beam incident on a phantom, the radiation beam being emitted by a radiation source. The method further includes determining a beam pointing offset based on the image and calibrating a position of the radiation source based on the beam pointing offset. A calibration system is described including the phantom, the camera, and a processing device. A phantom having an X-ray luminescent material is also…
Offline angle selection in rotational imaging and tracking systems
Granted: January 14, 2020
Patent Number:
10532224
A processing device determines a plurality of angles from which tracking images can be generated by an imaging device. The processing device generates a plurality of projections of a treatment planning image of a patient, the treatment planning image comprising a delineated target, wherein each projection of the plurality of projections has an angle that corresponds to one of the plurality of angles from which the tracking images can be taken. The processing device determines, for each…
Gantry image guided radiotherapy system and related treatment delivery methods
Granted: December 10, 2019
Patent Number:
10500415
A radiation treatment apparatus, comprising a gantry structure comprising a beam member extending between first and second ends of the gantry structure. The radiation treatment apparatus also includes a radiation treatment head movably mounted to the beam member in a manner that allows (i) translation of the radiation treatment head along the beam member between the first and second ends, and (ii) gimballing of the radiation treatment head relative to the beam member, the gimballing…
