Monte Carlo simulation of Cerenkov imaging for total skin electron treatment with CT DICOM realistic patient geometry

Weili Zhong; Yihong Ong; Tianshun Miao; Brian W. Pogue; Timothy C. Zhu

doi:10.1117/12.2609027

4 March 2022 Monte Carlo simulation of Cerenkov imaging for total skin electron treatment with CT DICOM realistic patient geometry

Weili Zhong, Yihong Ong, Tianshun Miao, Brian W. Pogue, Timothy C. Zhu

Author Affiliations +

Proceedings Volume 11940, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic and Photobiomodulation Therapy XXX; 1194009 (2022) https://doi.org/10.1117/12.2609027
Event: SPIE BiOS, 2022, San Francisco, California, United States

Abstract

This Monte Carlo (MC) simulation study provides an evaluation of dose uniformity in a patient and the difference between dose and Cherenkov distributions, which is invaluable in developing conversion factors to relate observed Cherenkov images to actual dose distributions for TSET patients. This MC simulations with TOPAS is performed using realistic patient geometries obtained with a 3D scanner during total skin electron treatments (TSET) at UPenn. For each treatment posture in the Stanford technique, the differences between Cherenkov photon distributions and dose distributions produced in MC are consistent with the differences observed between a Cherenkov imaging camera and in-vivo dose measurement with OSLD on patient skin. According to MC studies of a flat rectangular PVC board, the difference between Cherenkov and dose is mostly due to the spoiler. This is confirmed by observing consistent dose and Cherenkov distributions in clinical measurements on a PVC board without the spoiler. The accumulated dose and Cherenkov distributions for each patient are obtained by projecting the MC output of the 6 postures of the TSET treatment together onto a finite element model of the patient.

Conference Presentation

Citation Download Citation

Weili Zhong, Yihong Ong, Tianshun Miao, Brian W. Pogue, and Timothy C. Zhu "Monte Carlo simulation of Cerenkov imaging for total skin electron treatment with CT DICOM realistic patient geometry", Proc. SPIE 11940, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic and Photobiomodulation Therapy XXX, 1194009 (4 March 2022); https://doi.org/10.1117/12.2609027

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