نتایج جستجو برای: SSDeff
تعداد نتایج: 4 فیلتر نتایج به سال:
conclusions using the maximum dose depth from pdd curves and the inverse square law, the required ssdeff to calculate the dose distribution of the electron beam can be calculated. objectives the aim of this study was to determine the effective source-surface distance (ssdeff) of an electron linear accelerator (linac), and its dependence on energy and depth. materials and methods a varian linac ...
PURPOSE To calculate the output factor (OPF) of any irregularly shaped electron beam at extended SSD. METHODS Circular cutouts were prepared from 2.0 cm diameter to the maximum possible size for 15 × 15 applicator cone. In addition, two irregular cutouts were prepared. For each cutout, percentage depth dose (PDD) at the standard SSD and doses at different SSD values were measured using 6, 9, ...
Introduction: Treatment with megavoltage electron beams is ideal for irradiating superficial tumors because of their limited range in tissues. However, for electron treatment of extended areas, such as the chest wall, two or more adjacent fields can be used. Abutment of these fields may lead to significant dose in homogeneities in the junction region. The aim of this study is to offer a new met...
Purposes: The dose in water caused by clinical electron-beam irradiation is mainly composed of the doses due to direct electrons, indirect and contaminant X-rays. In this paper, an analytical method for 3-dimensional (3D) calculation electrons direct-plus-indirect proposed light electron Monte Carlo (eMC) datasets. Methods: was performed square fields, based on a revised Gaussian pencil beam mo...
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