Related Experiment Video
Updated: May 9, 2026
11:12
Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
Published on: September 18, 2012
A polygon-surface reference Korean male phantom (PSRK-Man) and its direct implementation in Geant4 Monte Carlo
Chan Hyeong Kim1, Jong Hwi Jeong, Wesley E Bolch
1Department of Nuclear Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea. chkim@hanyang.ac.kr
Physics in Medicine and Biology
|April 28, 2011
Summary
A new polygon-surface phantom (PSRK-Man) was developed from a voxel phantom (VKH-Man) for Monte Carlo dose calculations. Results show good agreement with voxel phantoms, despite slower computation speeds.
Area of Science:
- Medical Physics
- Computational Biology
- Radiological Sciences
Background:
- Voxel phantoms require voxelization for Monte Carlo simulations, limiting their use.
- Hybrid phantoms offer anatomical realism and deformability but still need voxelization.
- Existing methods face limitations due to the voxelization process.
Purpose of the Study:
- To develop and implement a polygon-surface phantom (PSRK-Man) for direct use in Monte Carlo dose calculations.
- To compare dose calculation accuracy and computational time with a corresponding voxel phantom (HDRK-Man).
- To evaluate the feasibility of using surface phantoms without voxelization in Geant4 simulations.
Main Methods:
- Converted the VKH-Man voxel phantom to a polygon-surface phantom (PSRK-Man).
- Adjusted PSRK-Man to Reference Korean data.
- Implemented PSRK-Man directly in Geant4 Monte Carlo code for dose calculations.
- Compared results with the HDRK-Man voxel phantom.
Main Results:
- Calculated dose values using PSRK-Man showed good agreement with HDRK-Man.
- PSRK-Man was 70-150 times slower than HDRK-Man.
- Direct implementation of PSRK-Man eliminated the need for voxelization.
Conclusions:
- Polygon-surface phantoms can be directly implemented in Monte Carlo codes for dose calculations with good accuracy.
- While slower, the direct use of surface phantoms offers advantages by bypassing voxelization.
- Future optimizations in Monte Carlo transport kernels and computing technologies can enhance speed for surface phantom applications.
Related Concept Videos
02:30Naturalistic Observations
If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...
01:30Cognitive Development During Adulthood
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...