An analytic model of neutron ambient dose equivalent and equivalent dose for proton radiotherapy
نویسندگان
چکیده
منابع مشابه
Implementation of an Analytical Model for Leakage Neutron Equivalent Dose in a Proton Radiotherapy Planning System
Equivalent dose from neutrons produced during proton radiotherapy increases the predicted risk of radiogenic late effects. However, out-of-field neutron dose is not taken into account by commercial proton radiotherapy treatment planning systems. The purpose of this study was to demonstrate the feasibility of implementing an analytical model to calculate leakage neutron equivalent dose in a trea...
متن کاملAn Analytical Model of Leakage Neutron Equivalent Dose for Passively-Scattered Proton Radiotherapy and Validation with Measurements
Exposure to stray neutrons increases the risk of second cancer development after proton therapy. Previously reported analytical models of this exposure were difficult to configure and had not been investigated below 100 MeV proton energy. The purposes of this study were to test an analytical model of neutron equivalent dose per therapeutic absorbed dose at 75 MeV and to improve the model by re...
متن کاملDevelopment and Characterization of a Neutron Personal Dose Equivalent Monitor
The authors developed a new neutron-measuring instrument that was designed to measure a neutron personal dose equivalent, Hp(10). This instrument is composed of a conventional moderator-based neutron dose equivalent meter and a neutron shield made of borated polyethylene which covers a backward hemisphere to adjust the angular dependence. The whole design was determined on the basis of MCNP cal...
متن کاملAltitude Variation of cosmic-ray neutron energy spectrum and ambient dose equivalent at Mt
The experimental studies on the cosmic-ray neutron energy spectrum and the neutron dose rate were performed in the Mt.Fuji area (altitude: 40m – 2400m) by using a Multi-sphere neutron Spectrometer (Bonner Sphere: BS) with the 5.07-cm diam. spherical He-3 proportional counter to assess the natural background neutron dose rate in Japan with good accuracy. The spectra measured at each altitude wer...
متن کاملMonte Carlo study of neutron-ambient dose equivalent to patient in treatment room.
This paper presents an analytical method for the calculation of the neutron ambient dose equivalent H* (10) regarding patients, whereby the different concrete types that are used in the surrounding walls of the treatment room are considered. This work has been performed according to a detailed simulation of the Varian 2300C/D linear accelerator head that is operated at 18MV, and silver activati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics in Medicine and Biology
سال: 2010
ISSN: 0031-9155,1361-6560
DOI: 10.1088/0031-9155/55/23/s01