Patent application number | Description | Published |
20080253635 | Image-Wide Artifacts Reduction Caused by High Attenuating Objects in Ct Deploying Voxel Tissue Class - A reconstruction processor ( | 10-16-2008 |
20090080603 | ONLINE IGRT USING DIGITAL TOMOSYNTHESIS - A system includes movement of a treatment delivering x-ray source to a treatment position, creation of projection images of a target using an imaging x-ray source while the treatment delivering x-ray source is disposed at the treatment position, and performance of digital tomosynthesis on the projection images while the treatment delivering x-ray source is disposed at the treatment position to generate a cross-sectional image of the target. A characteristic of an x-ray beam to be delivered by the treatment delivering x-ray source may be automatically modified based on the cross-sectional image. In some aspects, the imaging x-ray source translates in a plane normal to a beam axis of the treatment delivering x-ray source at the treatment position, and pivots about an axis passing through the imaging x-ray source during creation of projection images. Creation of the projection images may alternatively include emission of a respective x-ray beam from each of a plurality of sources of the imaging x-ray source, wherein the imaging x-ray source is stationary with respect to the treatment delivering x-ray source during creation of the projection images. | 03-26-2009 |
20090262894 | Medical Imaging Processing and Care Planning System - A system automatically compares radiotherapy 3D X-Ray images and subsequent images for update and re-planning of treatment and for verification of correct patient and image association. A medical radiation therapy system and workflow includes a task processor for providing task management data for initiating image comparison tasks prior to performing a session of radiotherapy. An image comparator, coupled to the task processor, in response to the task management data, compares a first image of an anatomical portion of a particular patient used for planning radiotherapy for the particular patient, with a second image of the anatomical portion of the particular patient obtained on a subsequent date, by image alignment and comparison of image element representative data of aligned first and second images to determine an image difference representative remainder value and determines whether the image difference representative remainder value exceeds a first predetermined threshold. An output processor, coupled to the image comparator, initiates generation of an alert message indicating a need to review planned radiotherapy treatment for communication to a user in response to a determination the image difference representative remainder value exceeds a predetermined threshold. | 10-22-2009 |
20100054409 | PATIENT SETUP ERROR EVALUATION AND ERROR MINIMIZING SETUP CORRECTION IN ASSOCIATION WITH RADIOTHERAPY TREATMENT - In some embodiments, a method includes receiving, in a processor, information indicative of (i) a treatment plan defining planned treatment beams, (ii) a patient volume relative to a reference, (iii) ideal intersections of the planned treatment beams with the patient volume at the time the patient is to be treated, (iv) any constraints that prevent achievement of the recommended repositioning using only the patient support, (v) an allowable change to a gantry position from a planned value and an allowable change to a collimator position from a planned value; defining, in the processor, a plurality of alternatives based at least in part on the information indicative of any constraints of the patient support and the information indicative of allowable movement of the gantry and collimator, each alternative defining a modified patient support position and modified beams, each modified beam being based at least in part on a respective one of the planned treatment beams, the change to the position of the gantry for the respective planned treatment beam and the change to the position of the collimator for the respective planned treatment beam; determining, in the processor, for each modified beam of each alternative, an intersection of the patient volume and the modified beam, with the patient volume positioned on the patient support and the patient support having the modified patient support position defined by the alternative; and defining, in the processor, for each alternative, a measure of difference between the ideal intersections and the intersections for the modified beams of the alternative. | 03-04-2010 |
20100061515 | MOTION DETECTION BY DIRECT IMAGING DURING RADIOTHERAPY - An apparatus, method, system, and means to detect motion of a subject by direct imaging on a treatment plane during a radiotherapy treatment, the method includes delivering a radiotherapy treatment beam to a volume of interest of the subject during a treatment time, acquiring image data during the treatment time associated with the delivery of the radiotherapy treatment beam by a direct imaging of a projection of the treatment volume of interest, providing a real-time display of the acquired image data, determining the occurrence of a motion in the volume of interest during the treatment time, determining the motion exceeds a pre-determined threshold, and outputting an indication the determined motion exceeds the pre-determined threshold during the treatment time. | 03-11-2010 |
20110293067 | System and Method for Dynamic Strobe Arc Therapy - Aspects may include movement of at least one device along a path to change an orientation of a target volume with respect to a radiation beam emitter, determination that the at least one device has reached a start position of a first path section associated with a first radiation treatment beam, emission, while the at least one device moves along the first path section, of the first radiation treatment beam from the radiation beam emitter toward a target volume, determination that the at least one device has reached a stop position of the first path section, ceasing emission of the first radiation treatment from the radiation beam emitter in response to the determination that the at least one device has reached a stop position of the first path section, determination that the at least one device has reached a start position of a second path section associated with a second radiation treatment beam, the start position of the second path section being different from the stop position of the first path section, and emission, while the at least one device moves along the second path section, of the second radiation treatment beam from the radiation beam emitter toward the target volume. | 12-01-2011 |
20110305380 | Characterization of Source Trajectory for Radiotherapy - Some embodiments include obtaining a projection image of a plurality of fiducials associated with a coordinate system irradiated by a radiotherapy radiation source at a plurality of discrete locations on a trajectory path model, determination of a projection matrix from projection images of the fiducials irradiated by the radiotherapy radiation source at each of the discrete locations, determination of the actual coordinate of the radiotherapy radiation source in the coordinate system associated with the fiducials at the plurality of discrete locations based on the determined projection matrices, and correlating the trajectory path model of the radiotherapy radiation source to the determined actual position of the radiotherapy radiation source at the discrete locations. | 12-15-2011 |
20120197058 | Grid Radiotherapy for Static and Dynamic Treatment Delivery - Some aspects include a system, method, and computer-readeable medium to divide a representation of a target volume into an array of sub-volumes; define a high dose volume to which a high dose of radiation is to be delivered; define a plurality of sampling volumes; direct an estimated dose of radiation to each sub-volume; determine whether the dose of radiation delivered to each high dose volume is at least a minimum threshold dose, and that the radiation delivered to the plurality of sampling volumes for each of the sub-volumes is at least a minimum difference less than the radiation delivered to the high dose volume; adjust the estimated dose of radiation directed to each sub-volume; and develop a radiation treatment plan, including the adjusted dose, to invoke a biological effect of spatially separated radiation. | 08-02-2012 |
20130343511 | Quantitative Two-Dimensional Fluoroscopy via Computed Tomography - A system includes obtaining of a reference projection image of a target volume at an isocenter of a computed tomography scanner; obtaining of a plurality of two-dimensional fluoroscopic images by the computed tomography scanner of at least a portion of the target volume at the isocenter of the computed tomography scanner; displaying the reference projection image and the plurality of two-dimensional fluoroscopic images in a combined view; measuring a two-dimensional contour of a projection of a movement of the target volume in the combined view; and determining a true contour of the movement in a plane containing a point-of-interest within the target volume based on the two-dimensional contour of the projection of the movement. | 12-26-2013 |