METHOD FOR DETERMINING ABSORBED DOSE OF PROTON RADIATION Russian patent published in 2020 - IPC A61N5/10 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to dosimetry of ionizing radiations. Method for determining absorbed dose of proton radiation involves performing by 3D printing vessels repeating volumes of irradiated anatomical organ and critical structure adjacent to volume of irradiated anatomical organ, filling them with liquid chemical dosimeter, installation in a cylindrical water phantom, carrying out irradiation according to a pre-calculated radiation plan and calculating the average volume of the absorbed dose of proton radiation, wherein the vessels repeating the shape and size of the irradiated anatomical organ and the critical structure are made rigidly connected, preliminarily filled with distilled water, providing vessels and their plugs with marks and installed in water phantom so that position of vessels relative to center of phantom and walls corresponds to position of irradiated anatomical organ and critical structure on tomographic image of patient, calculating the preliminary exposure plan from the obtained tomographic image, irradiating the rigidly connected vessels filled with the liquid chemical dosimeter and installed in the phantom, by means of marks, in the same position, and determining the absorbed dose of proton radiation in the volume of the irradiated anatomical organ by a calibration curve obtained for the given exposure conditions of the liquid chemical dosimeter.

EFFECT: using the invention enables faster verification of therapeutic radiation plans in proton therapy and dosimetry when using a scanning proton beam.

1 cl, 2 dwg