Patent ID: 11931600
Assignee: UNIVERSITY OF MARYLAND, BALTIMORE
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A method for charged particle therapy comprising:
obtaining medical image data for a plurality of voxels inside a subject in a reference frame of a radiation source that emits a beam of charged particles in each of a plurality of tracks with a controlled emitted energy at each track;
for a first beam having a first track and first emitted energy, determining hydrogen density at each voxel along the first beam selected from the plurality of voxels based on the medical image data;
calculating automatically on a processor stopping power ratio along the first beam based on the hydrogen density at each voxel along the first beam selected from the plurality of voxels;
calculating automatically on the processor range to a Bragg peak along the first beam based on the stopping power ratio and the first emitted energy;
modifying automatically on the processor the first beam track or the first emitted energy of the first beam, or both, based at least in part on the range to the Bragg peak to determine a second track and second emitted energy of a modified beam; and
causing the radiation source to be operated to deliver the modified beam by sending automatically from the processor output data that indicates the second track and second emitted energy of the modified beam.