نتایج جستجو برای: dose index
تعداد نتایج: 692834 فیلتر نتایج به سال:
Emerging concerns regarding the hazard from medical radiation including CT examinations has been suggested. The purpose of this study was to observe the longitudinal changes of CT radiation doses of various CT protocols and to estimate the long-term efforts of supervising radiologists to reduce medical radiation. Radiation dose data from 11 representative CT protocols were collected from 12 hos...
OBJECTIVE To assess the reduction of estimated radiation dose in abdominal computed tomography following the implementation of new scan protocols on the basis of clinical suspicion and of adjusted images acquisition parameters. MATERIALS AND METHODS Retrospective and prospective review of reports on radiation dose from abdominal CT scans performed three months before (group A - 551 studies) a...
Background: This study was conducted to evaluate effects of intraperitoneal administration of Giberellic Acid (GBA), a hormone of plants, on testicular tissue of adult rats. Materials and Methods: Thirty six adult male Wistar rats were divided into four groups (n=9). Control group was untreated, control-sham group injected 0.5cc 1% methanol, low dose of GBA group was administered 2 mg/kg and hi...
خطرات پره اکلامپسی و متعاقب آن اکلامپسی به خوبی مشخص می باشد. آسپرین low-dose با کاهش انتخابی ترومبوکسان a2 سبب غلبه پروستاسیکلین شده و به این طریق از پره اکلامپسی و عوارض آن جلوگیری می نماید. در این مطالعه 150 خانم حامله در معرض پره اکلامپسی به طور رندوم به دو گروه دریافت کننده آسپرین (60 نفر) و دریافت کننده آسپرین (90 نفر) تقسیم شدند. پراکلامپسی فقط در 2 نفر از گروه آسپرینی دیده شد(3/3
OBJECTIVE To assess the effects of radiation dose reduction in the chest CT using a weight-based adjustment of the automatic exposure control (AEC) technique. MATERIALS AND METHODS With Institutional Review Board Approval, 60 patients (mean age, 59.1 years; M:F = 35:25) and 57 weight-matched patients (mean age, 52.3 years, M:F = 25:32) were scanned using a weight-adjusted AEC and non-weight-a...
Introduction: The functionality and quality of any treatment planning system (TPS) strongly depends on the type of Algorithm which is used by it. Obviously, the role of dose distribution algorithms in calculation of prescribed dose inside the tumor in modern radiotherapy techniques has more important than past to achieve the best clinical outcomes, especially in tumors which ar...
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