Reza Faghihi
School of Mechanical Engineering, Nuclear Engineering Department, Shiraz University, Shiraz, Iran Radiation Research Center, Shiraz University, Shiraz, Iran
[ 1 ] - A Comparison of the Dosimetric Parameters of Cs-137 Brachytherapy Source in Different Tissues with Water Using Monte Carlo Simulation
Introduction After the publication of Task Group number 43 dose calculation formalism by the American Association of Physicists in Medicine (AAPM), this method has been known as the most common dose calculation method in brachytherapy treatment planning. In this formalism, the water phantom is introduced as the reference dosimetry phantom, while the attenuation coefficient of the sources in the...
[ 2 ] - Calculating of Dose Distribution in Tongue Brachytherapy by Different Radioisotopes using Monte Carlo Simulation and Comparing by Experimental Data
Introduction: Among different kinds of oral cavity cancers, the frequency of tongue cancer occurrence is more significant. Brachytherapy is the most common method to cure tongue cancers. Long sources are used in different techniques of tongue brachytherapy. The objective of this study is to asses the dose distribution around long sources, comparing different radioisotopes as brachytherapy sourc...
[ 3 ] - روش جدید خورش چندمرحلهای کالیبراسیون آشکارساز ردپای هستهای 39CR- برای بینابسنجی ذرات آلفا
In this paper, application of the CR-39 passive nuclear track detector for spectrometry of alpha particles is investigated. To this end, a standard Am-241 source as the alpha radiation source, and brass collimators with different heights for energy determination of alpha particles were utilized. The detectors were irradiated by alpha particles in the energy range of 0.8 to 4.8 MeV and then were...
[ 4 ] - The Effect of Breast Phantom Material on the Dose Distribution in AccuBoost Brachytherapy
Introduction: Long-term teletherapy program is not suitable for old and working patients and those living in areas where little access to primary health care is available. Accelerated partial breast irradiation (APBI) using high dose rate (HDR) brachytherapy is an appropriate alternative for these patients due to its limited number of fractions. The AccuBoost is a system for delivering APBI. Th...
[ 5 ] - Application of characteristic X-rays to measure linear attenuation coefficient of nano-composites used in shielding
Using of X-rays in different industries and especially in medical application is increasing. In this regard, designing of light and efficient protective material based on polymeric nanocomposites and precise study of the effect of adding nanoparticles with different sizes on the X-ray attenuation is necessary. In this study the epoxy nanocomposites with different percentages of copper oxide nan...
[ 6 ] - Calculation of airkerma conversion factor to personal dose equivalent at various depths using the Monte Carlo Code GATE
Several studies have been done with the aim of improving the quality of the radiation protection measurement in radiology and nuclear medicine. Among different subjects which are capable to be considered in this area, the measurement of the operational quantities of protection against the radiation ,such as, personal dose equivalent ,HP(d), at different depths (d=0.07mm, 3mm, 10mm) is an impor...
[ 7 ] - Experimental comparison of thermal neutron absorption cross section in nano and micro particles
The neutron collision cross-section is important in neutron use for a specific job, such as neutron therapy or even in nuclear reactors. In calculating computational codes such as MCNP, only information from the neutron-to-mass collision information contained in the computational code library is used, in the case of nanoscale particles in contrast to the mass of materials and / or particulate m...
[ 8 ] - Design and calibration of a passive detector for separating neutron, proton and alpha particles in mixed radiation fields
In this study, calibration process was carried out for deigned new CR-39 nuclear track detector for protons, neutrons and alpha particles separately under the same etching condition. In order to aim this purpose, americium-beryllium standard source (241Am-Be) and Plexiglas phantom for neutron irradiation, brass collimators and americium standard source (241Am) for alpha irradiation and the acce...
[ 9 ] - Introducing a bony composite as tissue equivalent for radiotherapy phantoms
The use of a device that simulates the actual condition, as well as being equivalent to the human body in materials and tissues, and having the capability of acting like internal motions of human body is necessary to investigate and simulate the motion of a tumor in radiotherapy and to evaluate dosimetrical coverage of the dynamic target. This device which is called the dynamic phantom should s...
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