رضاییان, پیمان
انرژی اتمی ایران
[ 1 ] - محاسبه نسبت دز جذبی بافت های مختلف به آب برای شتابدهنده های درمانی الکتا 25 مگاولتی و زیمنس 6 مگاولتی
In this paper, the ratio of adsorbed dose to the tissues of muscle, blood and bone to water for medical accelerators of Electa 25MV and Siemens 6MV is calculated using an analytical method based on cavity theory and Monte Carlo simulation. To confirm the validation of these methods, the ratio of absorbed dose to air to water was determined experimentally for radiation field of 60Co in Secondary...
[ 2 ] - An investigation of neutron direct damages at energies of 0.1-2 MeV on the DNA molecules with atomic structure deduced using Geant4 toolkit
This study proposes a method to estimate RBE of fast neutrons using Monte Carlo simulations. This approach is based on the combination of an atomic resolution DNA geometrical model and Monte Carlo simulations for tracking particles. Atomic positions were extracted from the Protein Data Bank. The GEANT4 code was used for tracking the secondary particles generated by fast neutrons during their in...
[ 3 ] - Measurement of dose equivalent of hand and eye of a nuclear medicine center technician during preparation of radiopharmaceutical containing 99mTc
Due to gamma irradiation by radioisotopes use for therapy and diagnostics proposes such as 99mTc, workers of nuclear medicine centers receives dose. Value of the dose equivalent of workers is determined using personnel dosimeters. Preparation, administration and injection of radiopharmaceutical are perfumed by technician so, the hand of technician received dose. In this paper the value of dose ...
[ 4 ] - Calculation 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...
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