Sun Nuclear Corporation

Jakub Kozelka

William E Simon

Amir Ramezanzadeh Moghadam

Jeffrey M Kapatoes

Benjamin E Nelms

Jeffrey L Hildreth

Jie Shi

Mark Rose

Kai Wundke

Ronald J Watts

Seth Brechbill

William Austhof

Thomas Allan Simon

Myron Brookshire

Andreas A Schönfeld

Disclosed is a system for quality assurance of high dose rate radiation therapy. The system includes a radiation delivery system configured to deliver high dose rate radiation therapy, with the radiation delivery system including a radiation source and a collimating system. The system also includes a radiation detection system having a diode to measure high dose rate radiation from the radiation source, an operational amplifier to transform the output of the diode to a measurable voltage, and a voltage source configured to apply a reverse bias to a component of the radiation detection system.

High dose rate radiation therapy systems and dosimetry

A computer program product, method, system and device that acquires, by a radiation detector, exit radiation measurement information during delivery of patient treatment. Patient anatomy information is also received and a radiation detector response calibration is determined utilizing at least the exit radiation measurement information, the patient anatomy information, and at least a portion of a radiation treatment plan.

Radiation detector calibration

A system is disclosed that includes a radiation therapy device with a gantry. The radiation therapy device is configured to deliver a radiation beam at an angle determined by orientation of the gantry. Also, a pair of radiation detectors are located at a fixed position to receive radiation originating from the radiation beam. Each of the radiation detectors in the pair generate differing responses to the radiation beam at the angle. The system further includes computer hardware configured to perform operations that determine the angle of the gantry utilizing the differing responses from the pair of radiation detectors.

Beam angle direction determination

Data from a first radiation detector and a second radiation detector can be used to determine a radiation dose pattern delivered to a radiation target from a radiation source. The first radiation detector can be positioned to intercept ionizing radiation directed from the radiation source toward the radiation target before the ionizing radiation has impinged on the radiation target and the second radiation detector can be positioned to intercept the ionizing radiation after the ionizing radiation has passed through the radiation target. Methods, systems, articles of manufacture, and computer program products are described.

Dosimetry for radiotherapy treatment verification

A method for performing composite dose quality assurance with a three-dimensional (3D) radiation detector array includes delivering a radiation fraction to the 3D array according to a radiation treatment (RT) plan, measuring absolute dose per detector of the 3D array, per unit of time, determining a radiation source emission angle per unit of time, synchronizing the RT plan with the measured absolute doses and determined radiation source emission angles to determine an absolute time for a control point of each beam of the synchronized RT plan, converting the beams of the synchronized RT plan into a series of sub-beams, generating a 3D relative dose grid for each of the sub-beams, applying a calibration factor grid to each of the 3D relative dose grids to determine a 3D absolute dose grid for each of the sub-beams, summing the 3D absolute dose grids to generate a 3D absolute dose deposited in the 3D array, and determining a 3D dose correction grid for application to the RT plan based on the 3D absolute dose.

Systems and methods for composite dose quality assurance with three dimensional arrays

A three dimensional radiation measurement scanning system includes a circular drive operable with horizontal and vertical drives for moving a radiation detector through first, second and third orthogonal axes in a three dimensional scanning of the detector in a water tank. Motor are coupled to the drives and activated by a controller for providing the movement of the radiation detector which providing radiation field sensing signals for locations of the detector throughout the tank. A reference detector is fixed for comparing its radiation field measurements with those of the scanned radiation detector. An offset mount carries the radiation detector allowing it to be extended beyond the circular ring gear during horizontal movement of the radiation detector and thus position the radiation detector at wall surfaces of the water tank.

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Melbourne, FL, United States of America

Jakub Kozelka