Proton therapy accelerators have become increasingly popular for cancer treatment in recent years. In Taiwan, the first proton treatment center equipped with a 235 MeV proton cyclotron in Linkou Chang Gung Memorial Hospital is ready for beam commissioning. Proton therapy accelerators in the energy range could potentially produce intense secondary neutrons, which must be carefully evaluated and ...

The general-purpose Monte Carlo radiation transport code MCNPX has been used to simulate photon transport and energy deposition in anthropomorphic phantoms due to the x-ray exposure from the Philips iCT 256 and Siemens Definition CT scanners, together with the previously studied General Electric 9800. The MCNPX code was compiled with the Intel FORTRAN compiler and run on a Linux PC cluster. A p...

This study used MCNPX code to investigate the brachytherapy (192)Ir dose distributions in water, bone, and lung tissue and performed radiophotoluminescent glass dosimeter measurements to verify the obtained MCNPX results. The results showed that the dose-rate constant, radial dose function, and anisotropy function in water were highly consistent with data in the literature. However, the lung do...

∗ This work was performed under the auspices of the U.S. Department of Energy. Abstract The collimation straight section of the SNS ring consists of three collimators with magnets (doublets and correctors) between them. It has been determined [1] that a large fraction of the particle halo loss occurs at the primary and secondary collimators. The dose to ring components in this location has been...

This study investigates the influence of several Monte Carlo radiation transport codes and nuclear models on simulation secondary neutron spectra its impact calculating measuring doses in proton therapy. Three different multi-purpose (FLUKA, MCNPX, Geant4) were used with available to calculate energy at various points inside a water tank phantom PMMA walls using 10 cm x rectangular, mono-energe...

Objective: Different categories are available for estimating of radiation dose. Radioisotopes with the same energy and almost the same physical properties have similar effects. Monte Carlo technique is a computerized method based on mathematical simulation of physical processes. The main purpose of this study is to show that beta particles are not able to penetrate deep into the water. also dif...