IP Library › Granted Patent US 8,927,921
Granted Patent B1
US 8,927,921 · App. 14/044,811 · Granted Jan 6, 2015

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

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Quick Facts
Patent No.
US 8,927,921
App. No.
14/044,811
Granted
Jan 6, 2015
Kind
B1
Abstract

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.

Claims (10)

1. A method for performing composite dose quality assurance with a three-dimensional (3D) radiation detector array, the method comprising:

delivering, from a moving radiation source, 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.

Assignments (4)
SECURITY INTEREST Recorded Oct 22, 2021
From: MIRION TECHNOLOGIES (HOLDINGSUB2), LTD.; MIRION TECHNOLOGIES (USHOLDINGS), INC.; MIRION TECHNOLOGIES (US), INC.; MIRION TECHNOLOGIES (CANBERRA), INC.; MIRION TECHNOLOGIES (CONAX NUCLEAR), INC.; SUN NUCLEAR CORP.; GAMMEX, INC.; MIRION TECHNOLOGIES (IST) CORPORATION; BIODEX MEDICAL SYSTEMS, INC.; MIRION TECHNOLOGIES (CAPINTEC), INC.
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 057890/0509 →
RELEASE OF SECURITY INTEREST Recorded Oct 22, 2021
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: MIRION TECHNOLOGIES (RADOS) GMBH; MIRION TECHNOLOGIES (CANBERRA UK) LTD.; MIRION TECHNOLOGIES (CANBERRA) SAS; MIRION TECHNOLOGIES (CANBERRA), INC.; MIRION TECHNOLOGIES (CANBERRA), INC. (F/K/A CANBERRA INDUSTRIES, INC.); MIRION TECHNOLOGIES (CANBERRA) INC. (F/K/A MIRION TECHNOLOGIES (IMAGING), LLC); MIRION TECHNOLOGIES (IST) CORPORATION; MIRION TECHNOLOGIES, INC.; BIODEX MEDICAL SYSTEMS, INC.; GAMMEX, INC.; SUN NUCLEAR CORP.
Reel/Frame 057890/0970 →
SECURITY AGREEMENT Recorded Jan 6, 2021
From: SUN NUCLEAR CORP.; GAMMEX, INC.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 054912/0663 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 11, 2014
From: NELMS, BENJAMIN; KOZELKA, JAKUB; SIMON, WILLIAM E.
To: SUN NUCLEAR CORPORATION
Reel/Frame 033504/0543 →