Patent ID: 9645255
Date: 2017-05-09
CPC Classifications: A61N,G01T

Claim:
1. A method to calibrate a proton spot scanning beam delivery system, the method comprising: receiving, in a plurality of ionization chambers disposed in a solid-state phantom, a portion of a proton beam emanating from a radiation treatment head and traversing at least a portion of plurality of ionization chambers, the proton beam being directed at the plurality of ionization chambers according to a radiation plan; detecting, via at least one ionization chamber of the plurality of ionization chambers, a plurality of monitoring units generated in response to charged air particles produced from a passage of the proton beam through the at least one ionization chamber; measuring a radiation field generated from passage of the proton beam through the portion of the plurality of ionization chambers; calculating a radiation dose corresponding to the measured radiation field based on a dose absorbed by the plurality of ionization chambers and the number of monitoring units generated from the passage of the proton beam; comparing the measured radiation field to the set of pre-defined proton beam data, the set of pre-defined proton beam data comprising a target radiation dose; and calibrating the proton spot scanning beam delivery system to generate a proton beam based on the target radiation dose.