Study on the GEANT4 code applications to the dose calculation using imaging data

TL;DR

This study demonstrates the application of GEANT4 Monte Carlo simulations combined with gMocren visualization to calculate and display patient dose distributions from DICOM imaging data, validated by dosimetry measurements.

Contribution

It introduces the use of gMocren for visualizing dose distributions on patient imaging data within GEANT4 simulations, addressing previous visualization limitations.

Findings

Dose distributions successfully visualized on patient images.

Simulation results validated by TLD and film dosimetry.

Enhanced visualization methods for patient-specific dose calculations.

Abstract

The use of GEANT4 code has increased in the medical field. There are various studies to calculate the patient dose distributions with the GEANT4 code using the imaging data. In present study, the Monte Carlo simulations based on the DICOM data were performed to calculate absorbed dose in the patient's body. Various visualization tools were equipped in the GEANT4 code to display the detector construction, however there are limitations to display the DICOM images. In addition, it is difficult to display the dose distributions on the imaging data of the patient. Recently, gMocren code, volume visualization tool for GEANT4 simulation, has been developed and used in volume visualization of image files. In this study, the imaging data based absorbed dose distributions in patient were performed by using the gMocren code. The dosimetric evaluations with TLD and film dosimetry methods were carried out to verify the calculation results.