کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5499050 | 1533484 | 2017 | 8 صفحه PDF | دانلود رایگان |
- Stopping power and range values were determined for eight human tissues.
- Stopping power values are analyzed by considering an effective approximation.
- Range calculations use the continuous slowing down approximation (CSDA) method.
- It is found that the error level is less than 10% in proton therapy region.
The object of this work is to present the consequences for the stopping power and range values of some human tissues at energies ranging from 1Â MeV to 1Â GeV and 1-500Â MeV, respectively. The considered human tissues are lung, intestine, skin, larynx, breast, bladder, prostate and ovary. In this work, the stopping power is calculated by considering the number of velocity-dependent effective charge and effective mean excitation energies of the target material. We used the Hartree-Fock-Roothaan (HFR) atomic wave function to determine the charge density and the continuous slowing down approximation (CSDA) method for the calculation of the proton range. Electronic stopping power values of tissues results have been compared with the ICRU 44, 46 reports, SRIM, Janni and CasP data over the percent error rate. Range values relate to tissues have compared the range results with the SRIM, FLUKA and Geant4 data. For electronic stopping power results, ICRU, SRIM and Janni's data indicated the best fit with our values at 1-50, 50-250Â MeV and 250Â MeV-1Â GeV, respectively. For range results, the best accordance with the calculated values have been found the SRIM data and the error level is less than 10% in proton therapy. However, greater 30% errors were observed in the 250Â MeV and over energies.
Journal: Radiation Physics and Chemistry - Volume 140, November 2017, Pages 43-50