Korean J Med Phys.
2007 Dec;18(4):221-225.
Monte Carlo Calculation on the Dose Modulation Using Dynamic Magnetic Fields for 10 MV X-rays
- Affiliations
-
- 1Department of Radiation Oncology, Chungnam National University Hospital, Daejeon, Korea.
- 2Department of Radiation Oncology, Eulji University Hospital, Daejeon, Korea.
- 3Department of Radiation Oncology, Dankook University Hospital, Cheonan, Korea.
- 4Research Institute of Clinical Medicine, Chonbuk National University, Jeonju, Korea.
- 5Department of Radiation Oncology, School of Medicine, Wonkwang University, Iksan, Korea.
- 6Department of Radiation Oncology, Dong-A University Hospital, Busan, Korea.
- 7Cancer Research Institute, Chungnam National University, Daejeon, Korea. mjcho@cnu.ac.kr
- 8Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Korea.
Abstract
- Monte Carlo calculations were performed to demonstrate the dose modulation with dynamic magnetic fields in phantom. The goal of this study is to obtain the uniform dose distributions at a depth region as a target on the central axis of photon beam under moving transverse magnetic field. We have calculated the depth dose curves for two cases of moving magnetic field along a depth line, constant speed and optimal speed. We introduced step-by-step shift and time factor of the position of the electromagnet as an approximations of continuous moving. The optimal time factors as a function of magnetic field position were calculated by least square methods using depth dose data for static magnetic field. We have verified that the flat depth dose is produced by varying the speed of magnetic field as a function of position as a results of Monte Carlo calculations. For 3 T magnetic field, the dose enhancement was 10.1% in comparison to without magnetic field at the center of the target.
- Full Text Links
-
- Actions
-
Cited
- CITED
-
- Close
- Share
-
- Similar articles
-
- Measurement and Monte Carlo Simulation of 6 MV X-rays for Small Radiation Fields
- Monte Carlo Photon and Electron Dose Calculation Time Reduction Using Local Least Square Denoising Filters
- Absorbed Dose Determination for a Biological Sample Irradiated by Gamma Rays from a Cs-137 Source
- A Monte Carlo Simulation Study of a Therapeutic Proton Beam Delivery System Using the Geant4 Code
- Consideration of Surface Dose and Depth of Maximum Dose Using Various Detectors for High Energy X-rays
