Hadi Taleshi Ahangari

[ 1 ] - Evaluation of MCNPX and GATE with HotSpot for Internal Dosimetry (Simulation Study)

Objective: Different categories are available for estimating of radiation dose. Radioisotopes with the same energy and almost the same physical properties have similar effects. Monte Carlo technique is a computerized method based on mathematical simulation of physical processes. The main purpose of this study is to show that beta particles are not able to penetrate deep into the water. also dif...

[ 2 ] - ارزیابی فاکتورهای موثر در کیفیت آموزشی گروه فیزیک پزشکی

سابقه و هدف: بهبود کیفیت آموزشی بر اساس یک روش یا الگو در هر دانشگاهی انجام می شود. یکی از روشها و شاخص های ارزیابی کیفیت آموزشی، ارزیابی درونی است و هر دانشگاهی با استفاده از توانمندی های خود، امکان برنامه ریزی و توسعه برنامه ها را خواهد داشت. مواد و روشها: در این مطالعه توصیفی – مقطعی، کمیته ارزشیابی توسط اعضای هیات علمی گروه فیزیک پزشکی تشکیل گردید. تعداد اعضای هیات علمی دخیل در این تحقیق 4...

[ 3 ] - Evaluation of MCNPX and GATE with HotSpot for Internal Dosimetry (Simulation Study)

Objective: Different categories are available for estimating of radiation dose. Radioisotopes with the same energy and almost the same physical properties have similar effects. Monte Carlo technique is a computerized method based on mathematical simulation of physical processes. The main purpose of this study is to show that beta particles are not able to penetrate deep into the water. also dif...

[ 4 ] - Evaluation of cellular S-value of auger electrons emitting 111In radionuclide by Geant4 and its comparison with MCNP5 Monte Carlo codes and MIRD published data

Introduction: Now day Ionizing radiation has found increasing applications in cancer treatment. However, in the treatment different kinds and size of tumors especially metastatic and small size tumors, conventional methods of external radiation therapy are not common. In radionuclide therapy, the use of monoclonal antibodies has made it possible to achieve maximum dose to small size tumor and m...

[ 5 ] - Evaluation of methods of co-segmentation on PET/CT images of lung tumor: simulation study

Introduction: Lung cancer is one of the most common causes of cancer-related deaths worldwide. Nowadays PET/CT plays an essential role in radiotherapy planning specially for lung tumors as it provides anatomical and functional information simultaneously that is effective in accurate tumor delineation. The optimal segmentation method has not been introduced yet, however several ...

[ 6 ] - Bremsstrahlung imaging from the liver using the Monte Carlo simulation

Introduction: Most beta and gamma radiation radioisotopes used for treatment are not suitable for imaging. The bremsstrahlung images on a conventional gamma camera helped to localize the radionuclide within and outside of the lesion. Secondary scattering of gamma rays of higher energy and bremsstrahlung causes contamination in the energy window and reducing the contrast and resolution of the im...