Absorbed doses in tissue-equivalent spheres above radioactive sources in soil
نویسندگان
چکیده
منابع مشابه
Absorbed doses in tissue-equivalent spheres above radioactive sources in soil.
Doses due to external exposure of terrestrial biota are assessed using differential air kerma from radioactive sources in soil and energy-dependent 'absorbed dose-per-air kerma' conversion factors computed for spherical tissue-equivalent bodies. The presented approach allows computing average whole body absorbed dose for terrestrial organisms with body masses from 1 mg to 1,000 kg located at he...
متن کاملMeasurement of Absorbed Doses in Anatomical Phantoms
Purpose: Many theoretical models have been designed to predict exposure levels and absorbed doses under various exposure conditions. The aim of this report, however, is to obtain, through a practical method, a quantitative measure of the absorbed doses in patients undergoing routine X-ray examinations to various anatomical sites. Materials and Methods: Anatomical phantoms simulating patients’ e...
متن کاملStandardization of Radioactive Sources
INTRODUCTION Primary standards of radioactivity are in some ways, analogous to fixed points in the temperature scale in that each can be used for comparison with "unknowns" not too far removed from the standard. Over a thousand radioactive species are known to exist, but only a comparatively few satisfy such basic requirements for primary standards as: known decay scheme; appropriate half life ...
متن کاملPreparation of solid water-equivalent radioactive standards.
The use of a superabsorbent polymer to prepare water-equivalent volume standards by solidification without the need of irradiation to effect the polymerization process, is described. Less than 40 g of the polymer is needed to solidify 1 litre of solution. Monte Carlo simulations of the gamma-ray escape probability indicate that the mixture is water-equivalent to better than 1.0%. During prepara...
متن کاملCalculation of absorbed dose in lung tissue equivalent and compared it with prediction of a treatment planning system using Collapsed Cone Convolution algorithm
External radiotherapy is used for treatment of various types of cancers. Due to the impossibility of measuring the absorbed dose delivered to different organs during irradiation, treatment planning systems (TPSs) have been utilized for calculation of absorbed dose before a radiotherapy procedure. Thus, the accuracy and precession of the TPS is essential.The aim of this study is investigation of...
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: Radiation and Environmental Biophysics
سال: 2014
ISSN: 0301-634X,1432-2099
DOI: 10.1007/s00411-014-0561-6