abbas haghparast
Department of Medical Physics, Faculty of Medicine, Kermanshah, Iran.
[ 1 ] - Field-In-Field Plan Versus Tangential Wedged Beam Plan in Chest Wall Radiotherapy of Post-Mastectomy Patients: Treatment Planning Study
Introduction: In this study, dose distribution of the chest wall in post-mastectomy breast cancer patients was evaluated and compared in the tangential wedged beam (TWB) and field-in-field (FIF) plans. Materials and Methods: Thirty-six patients with left-sided breast cancer were enrolled in this study. The FIF and TWB plans were generated for each patient to compare dosimetric parameters of th...
[ 2 ] - Numerical Study for Optimizing Parameters of High-Intensity Focused Ultrasound-Induced Thermal Field during Liver Tumor Ablation: HIFU Simulator
Introduction High intensity focused ultrasound (HIFU) is considered a noninvasive and effective technique for tumor ablation. Frequency and acoustic power are the most effective parameters for temperature distribution and the extent of tissue damage. The aim of this study was to optimize the operating transducer parameters such as frequency and input power in order to acquire suitable temperatu...
[ 3 ] - تأثیر کنتراستزاهای تجویزی بر منحنی های توزیع دوز در طراحی درمان رادیوتراپی بر پایه سیتیاسکن
Background: In three-dimensional conformal radiation therapy (3D-CRT), contrast-enhanced CT (CECT) image is commonly used to assist radiation oncologists in diagnosing regions of interest, so that normal and target tissues can be better delineated. CECT causes the temporary increase in the CT number and the corresponding electron density (ρe). Administrated contrast agents (CA) during CT simula...
[ 4 ] - EPID in vivo Dosimetry
Introduction: The most modern radiotherapy devices are equipped with an Electronic Portal Imaging Device (EPID) system which is located on opposite side of the machine’s head. EPID system is often used to setting up the position verification during or between radiotherapy sessions. Material and Methods: Various types of dosimeters have been used to setting up ...
[ 5 ] - Skin in vivo Dosimetry in Radiotherapy
Introduction: Due to the prevalence of skin problems in patients after radiotherapy, skin dose measuring is importance. Content: Skin in vivo dosimetry means measuring the patient's (or phantom) skin dose during radiotherapy. According to the ICRP 59, the dose at the depth of 0.07 mm is known as a skin dose. The most radiosensitive epidermis cells are located...
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