نتایج جستجو برای: dose index
تعداد نتایج: 692834 فیلتر نتایج به سال:
Introduction: Radiation therapy is one of the most important methods of cancer treatment. Radiation therapy uses symmetric and asymmetric fields in which the radiation dose distribution is different. To calculate the dose distribution, computer treatment planning systems are used which must have acceptable calculations accuracy. The aim of this study was to investigate the accuracy of the dose ...
Sublingual immunotherapy (SLIT) is an effective and well-tolerated method of treating allergic respiratory diseases associated with seasonal and perennial allergens. In contrast to the subcutaneous route, SLIT requires a much greater amount of antigen to achieve a clinical effect. Many studies have shown that SLIT involves a dose-response relationship, and therefore it is important to use a pro...
background: the study of rheological properties of blood has special interest since it is a circulating fluid exposed to shear rates during its life time. this work aims to investigate the influence of whole body gamma irradiation on the rheological properties of rat’s blood. the applied shear rate was from 12 to 375 s-1. low shear viscosity (up to 100 s-1) depends mainly on the erythrocytes ag...
Background – It is well known that for systemically administered drugs, such as corticosteroids, the therapeutic index cannot be improved by increasing their potency, since efficacy and safety are both attributable to circulating drug concentrations, and common receptor interactions. However, the validity of this assumption has not yet been investigated for inhaled corticosteroids, which are us...
1 From the Departments of Radiology of Mayo Clinic, 200 First St SW, Rochester, MN 55905 (C.H.M., S.L., L.Y.); University of Texas M.D. Anderson Cancer Center, Houston, Tex (D.D.C.); University of California–Davis, Sacramento, Calif (J.M.B.); and University of California, Los Angeles, Los Angeles, Calif (M.F.M.G.). Received September 8, 2010; revision requested October 25; revision received Dec...
Background: Three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) techniques are used for the treatment of patients with laryngeal cancer. Objective: This study aimed to investigate the effects of these 2 treatment techniques on the planning target volume (PTV) (laryngeal cancer), dose homogeneity, dose of organs at...
introduction: one of the sources of natural occurring radiation was soils. the purpose of article was to determine soil pollution by radiation absorbed dose rate, radium equivalent activity, external hazard index, annual gonad dose equivalent and annual effective dose equivalent. methods & materials: the soil samples was located in chahbahar city in blouchestan of iran, was chosen for studying ...
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