Loading...

Development of the Electron and Photon Transport Code for Dose Calculations on GPU and Benchmarking with EGSnrc Simulation for Radiotherapy

Malekzadeh, Etesam | 2015

632 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46736 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Sohrabpour, Mostafa
  7. Abstract:
  8. Almost half of all cancer patients receive radiation therapy as main or part of the treatment process. Before performing radiation therapy, first it is necessary to determine the patient’s treatment plan and estimate the outcome of it based on the dose distribution. The quality of treatment is dependent on the accuracy of dosimetry calculations that lies in Monte Carlo algorithms. Unfortunately, most of the computation time is long and not suitable for clinical applications. On the other hand, a real treatment planning will be possible if all aspects of radiation therapy should be considered. The radiation source that is obtained from a medical linear accelerator head is one of these aspects.In this project, the GPUDPM code was developed to support the phase space source obtained from linac. For validation of the developed code, the results of dosimetry for depth dose curves and lateral dose profiles were used that they were obtained using the 6 and 18 MV photon phase space source and 9 MeV electron phase space source in DOSXYZnrc code. The phase space sources with 6 MV and 9 MeV energy were downloaded from IAEA site. To create a source of 18 MV the linac model of Varian clinac 2100C was simulated using PRIMO toolkit code. Source analysis was performed using beamdp/Beamnrc utility program. Spectrum and angular distribution of the particles were examined. All simulations were done in the water phantom and the abdomen part of the female RANDO phantom using the GTX 660 Ti graphical processing unit and computer with Intel cori7-3.4 GHz processor. Comparison of the dose calculated with codes show the mean difference of less than 2%. Also the calculations were compared with results reported from experimental measurements. The mean error of less than 5% of the dose was reported. Finally, in all simulations the calculation speed of GPUDPM was remarkable to DOSXYZnrc code and about 306 times is faster than it
  9. Keywords:
  10. Phase Diagram ; Dose Planning Method (DPM) ; Varian Accelerator ; Monte Carlo Method ; Graphic Processing ; Electron Gamma Shower 4 ; PRIMO Code

 Digital Object List

 Bookmark

No TOC