نتایج جستجو برای: radiation center
تعداد نتایج: 513202 فیلتر نتایج به سال:
this study aimed to evaluate the radiation safety condition and the level of radiation-awareness amongst staff and patients in 18 hospitals of shahid beheshti university of medical sciences, tehran, iran. this descriptive, cross–sectional study was administered to patients and personnel, also making a review on the radiation-safety status in the hospitals. in evaluating the level of awareness, ...
conclusions the effective annual dose of interventionists who work in center 1 and 2 was 143.08 and 1226.78 msv respectively. the high radiation dose which delivers to the leg of physicians in center 2 can be an important cause of radiation dermatitis occurred on the leg of our interventionist. patient dose during most of the procedures was less than the threshold dose for occurring erythema bu...
*Department of Radiation Medicine, Long Island Jewish Medical Center, New Hyde Park, New York; yDepartment of Radiation Oncology, University of Colorado, Denver, Colorado; zDepartment of Radiation Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania; xSection of Radiation Oncology, Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire; {CyberKnife ...
We study the effective dynamics of a mechanical particle coupled to a wave field and subject to the slowly varying potential V (εq) with ε small. To lowest order in ε the motion of the particle is governed by an effective Hamiltonian. In the next order one obtains “dissipative” terms which describe the radiation reaction. We establish that this dissipative dynamics has a center manifold which i...
Introduction: In nuclear medicine, the demand for a variety of radionuclides is rising every day. Radionuclides radiation doses to patients and staff are of high importance and it should be monitored and controlled in medical imaging centers. This study aimed to evaluate the safety principles in the Hegmataneh Gamma scan nuclear medicine center in Hamadan. Methods and Materials: Dose rate me...
1Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, Texas; 2Department of Radiation Oncology, University of Michigan Health System, Ann Arbor, Michigan; 3Department of Radiation Oncology, University of Virginia Health System, Charlottesville, Virginia; 4Department of Radiation Oncology, University of Colorado, Denver, Aurora, Colorado; 5Department of Radi...
background: pet/ct imaging using [18f]-fdg is utilized in clinical oncology for tumor detecting, staging and responding to therapy procedures. essential consideration must be taken for radiation staff due to high gamma radiation in pet/ct and cyclotron center. the aim of this study was to assess the staff exposure regarding whole body and organ dose and to evaluate environment dose in pet/ct an...
introduction: active personal dosimeters (apds) are well accepted as useful and reliable instruments for individual dosimetry measurements. apds have many advantages compared with passive dosimeters for individual external radiation dose assessments. in routine monitoring, occupational exposure is carried out for verification and demonstration of compliance with the regulatory dose limits. so, ...
در این پایان نامه به بررسی ایدآل های اوّل و ابتدائی فازی و رادیکال های آنها می پردازیم. ابتدا به تعاریف اصلی و نتایج منطق فازی در فصل اوّل اشاره می کنیم و در فصل دوم به تعاریف و قضایای مربوط به مجموعه ها و ایدآل های فازی پرداخته، درنهایت در فصل سوم خصوصیات ایدآل های ابتدائی فازی ورادیکال آنها درحلقه های تعویض پذیرمورد بحث و بررسی قرارمی گیرد. ایدآل $a$ از $r$ ایدآل ابتدائی فازی است اگر برا...
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