نتایج جستجو برای: patient dose inwestern and eastern azerbyjan
تعداد نتایج: 16983853 فیلتر نتایج به سال:
Background: Reliable estimation of radiation-absorbed dose is necessary to evaluate the benefits and the risks of radiopharmaceuticals used for diagnostic or therapeutic purposes in nuclear medicine. Materiel and Methods: This study included 47 patients treated with iodine-131 for Graves’ disease. A comparative study between Geant4 Monte Carlo simulation and MIRD formalism was carried out to ev...
Pelvis X-ray examinations inevitably involve exposure of the gonads to ionizing radiation. In line with the principle of keeping doses as low as reasonably practicable (ALARP), accurate patient dose measurement is vital if we are to ascertain that these exposures are fully optimized. The study aimed to provide patient dose estimates for pelvis examination being undertaken at 10 separate hospita...
background: in radiation treatment of moving targets located in thorax region of patient body, the delivered dose does not match with the planned treatment, resulting in some over and under dosage in the tumor volume, as a function of motion magnitude and frequency. several efforts have been done to investigate the target motion effects on dose distribution in the target and surrounding normal ...
Introduction: This study, evaluate pediatric digital radiography. Due to the high rates of this test and the high sensitivity of children to ionizing radiation in comparison with adults, it is attempted to achieve near optimal conditions by reducing the dose and maintaining the image quality. The object of the study is to change the irradiation parameters such as kV and mA and ...
Introduction: In recent years, the number of computed tomography (CT) scans, which is a high-dose technique, has increased significantly. Head and neck CT is performed frequently and thyroid, particularly in children, has always been considered a sensitive organ. In recent years, radiobiologists and health physicists have been more concerned about the safety of lenses of the eyes, as cataract i...
Introduction: Total body irradiation (TBI) is a form of external beam radiotherapy which is used in conjunction with chemotherapy with the purpose of immunosuppression. Since the target in TBI is the whole body so a uniform dose distribution throughout the entire body during TBI is necessary. As recommended by AAPM dose variation must be within ±10% of prescription dose. A revi...
Introduction: There are several techniques for reducing the delivered dose from CT scans such as the automatic exposure control (AEC). This technique regulates the tube current regarding the patient size and weight. The aim of this study was estimation the effective and equivalent dose for radiosensitive organs in women undergoing chest CT scans with or without AEC system using the patient&rsqu...
Cyclosporine (CsA) is a drug that has been used for prevention of kidney transplant rejection for many years. Diltiazem with the inhibition of cyclosporine metabolism and clearance will increase CsA concentration and CsA dose can be decreased. The aim of this study was the evaluation of diltiazem effect on CsA dose adjustment with respect to C2. Forty stable renal transplant p...
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