Patent ID: 9192786
Filing Date: 2015-11-24
Classification: A61N

Abstract:
1. A system for radiotherapy comprising: an imaging system that generates volumetric image data of an area of interest of an object, wherein said imaging system comprises a cone-beam computed tomography system comprising: an x-ray source that emits x-rays towards said object; a first detector for receiving x-rays penetrating through said area of interest of said object and generating signals to generate said volumetric image data of said area of interest of said object, wherein said first detector receives fan-shaped x-rays after they pass through said area of interest of said object, said first detector generating a first imaging signal for each of said received fan-shaped x-rays; and a computer connected to said detector so as to receive said first imaging signals for each of said received fan-shaped x-rays, wherein said x-ray source and said first detector rotate about said object so that multiple imaging signals are reconstructed by said computer to generate a three-dimensional cone-beam computed tomography image therefrom; a radiation source that emits a therapeutic radiation beam towards said area of interest of said object in accordance with a reference plan; a second detector that receives radiation from said therapeutic radiation beam that passes through said area of interest, said second detector generating second imaging signals from said radiation; and a processing system (a) that receives and evaluates said volumetric image data, said second imaging signals and at least one parameter of said therapeutic radiation beam to provide 1) a real-time evaluation of said reference plan and 2) a real-time modification of said reference plan, wherein real-time is defined to be a time period when said therapeutic radiation beam is emitted towards said area of interest of said object, (b) that constructs a treatment dose received in said area of interest, and c) that estimates a final treatment dose in said area of interest by performing parameter estimation for random processes of patient anatomical variation.