A. Sadremomtaz
*, , Dept. of Physics, Faculty of Sciences, University of Guilan, P.O.Box 1841, Rasht, Iran *Corresponding Author's E-mail: [email protected]
[ 1 ] - A Comparative Study of Field Gamma-ray Spectrometry by NaI(Tl) and HPGe Detectors in the South Caspian Region
Natural radionuclides present in soil as well as certain anthropogenic radionuclides released to the environment are the major contributors to terrestrial outdoor exposures. In the assessment of human exposures from environmental radioactivity, besides the conventional method of soil and vegetation sampling combined with laboratory based analyses of environmental media, the other choice would b...
[ 2 ] - Dosimetric analysis for the selection of radionuclides in bone pain palliation targeted therapy: A Monte Carlo simulation
Introduction:The use of beta emitters is one of the effective methods for palliation of bone metastasis. The risk of normal tissue toxicity should be evaluated in the bone pain palliation treatment. Methods: In this study, the Monte Carlo simulation code MCNPX was used for simulation a bone phantom model consisted of bone marrow, bone and soft tissue. Spe...
[ 3 ] - Evaluation of the performance of parallel-hole collimator for high resolution small animal SPECT: A Monte Carlo study
Introduction: Image quality and accuracy of in vivo activity quantification in SPECT are affected by collimator penetration and scatter components, especially in high energy imaging. These phenomena highly depend on the collimator characteristic and photon energy. The presence of penetrated and scattered photons from collimator in SPECT images degrades spatial resolution, contr...
[ 4 ] - Review of transmission scanning configurations in cardiac SPECT
The diagnostic accuracy of single photon emission computed tomography (SPECT) is profoundly influenced by attenuation phenomenon. Soft tissue attenuation degrades cardiac SPECT image quality, thereby decreasing the possibility of the detection of the lesions. A variety of correction techniques based on different assumptions have been used to reduce the impact of attenuation. Several types of sy...
[ 5 ] - بررسی شبیه سازی تصاویر پزشکی هسته ای بافت ریه با استفاده از نرم افزار SIMIND به کمک فانتوم های رایانه ای
روش برش نگاری رایانهای گسیل تک فوتون)SPECT( یکی از ابزار های مهم تشخیصی در پزشکی هستهای است که در تصویربرداری از بافتهای مختلف بدن کاربرد دارد. با توجه به اسکن تهویهای-خون رسانی ریه، استفاده از سیستم تصویربرداری SPECTبرای تشخیص بیماریهای ریوی در حال گسترش یافتن است.ابتدا از برنامه MATLAB جهت ایجاد ضایعهی ریوی در فانتوم نیم تنه ZUBAL یعنی man-vox استفاده شد.سپس فانتوم به برنامه SIMIND انتقال داد...
[ 6 ] - Comparison of I-131, I-123 Absorbed Dose and Tc-99m in Thyroid Scanning Using MCNP Code in ORNL-MIRD Phantom
Introduction: Thyroid cancer is at the ninth from ten of common malignant cancer. A man has higher risk to get Thyroid cancer that a woman has. This organ is lain near human neck. The use of radioactive I-131, I-123 and Tc-99m for diagnosis of thyroid cancer has a risk where other organs around Thyroid will accept dose of radiation. One of the risks is large dose which is accep...
[ 7 ] - Investigation of neutron flux by thermoluminescence dosimeters in the neutron-gamma mixed field
Introduction: Neutrons have many applications in various fields, such as medicine. The important application of neutron in medical science is in Boron Neutron Capture Therapy (BNCT). Because of this, determination of neutron dose and flux is critical for the health maintaining of workers and patients exposed to this beam. The neutron radioisotope sources produce gamma rays in ...
[ 8 ] - Determination of the flux of a neutron radioisotope source through gold activation method
Introduction: In recent years, the use of neutrons has increased in various fields such as medicine and industry. One of the important applications of neutrons is in medical research. Neutrons have greater linear energy transfer than gamma rays and are considered more dangerous radiation. Hence, the detection and determination of neutron dose is a very important and vital issu...
[ 9 ] - Wavelet Transformation
Wavelet transformation is one of the most practical mathematical transformations in the field of image processing, especially image and signal processing. Depending on the nature of the multiresolution analysis, Wavelet transformation become more accessible and powerful tools. In this paper, we refer to the mathematical foundations of this transformation. Introduction: The...
[ 10 ] - InRaDoS: An internal radiation dosimetry computer program
Introduction: Internal radiation dosimetry is important from a radiation protection point of view and can help to optimize the radiation dose delivered to the workers, public, and patients. It has a rather simple protocol but needs a large amount of data. Therefore, it is difficult to do on a routine basis. The use of computer programs makes internal radiation dosimetry simpler...
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