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

Claim 7:
8. A non-transitory computer-readable medium carrying one or more sequences of instructions, wherein execution of the one or more sequences of instructions by one or more processors causes the one or more processors to perform the steps of:
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 at 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 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 range to a Bragg peak along the first beam based on the stopping power ratio and the first emitted energy;
modifying 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 output data that indicates the second track and second emitted energy of the modified beam.