نتایج جستجو برای: pressure build up test
تعداد نتایج: 2070300 فیلتر نتایج به سال:
Introduction Wedge modifiers are commonly applied in external beam radiotherapy to change the dose distribution corresponding to the body contour and to obtain a uniform dose distribution within the target volume. Since the radiation dose delivered to the target must be within ±5% of the prescribed dose, accurate dose calculation by a treatment planning system (TPS) is important. The objective ...
Introduction: The Sc is an important parameter to monitor unit (MU) calculation in radiation therapy procedure. The aim of this study is to measurement and comparison of head scatter factor (Sc) for 9MV photon beam using the build-up cap and a columnar mini-phantom. Materials and Methods: The measurements performed using a calibrated ion chamber (Scanditron...
Introduction:Various methods are applied in order to restore maxillary premolar teeth which show much decay, though some inconsistencies have been reported in regard with the rate of fracture strength in different studies. Therefore, in this study, fracture resistance of buccal cusp was compared via 5 different types of restorations. Methods: In this experimental study, 75 intact extracted max...
The simplest way of adapting the 6-channel model (Fig 6) to model the data of Brewer et al. [1] is to introduce weak, saturable coupling between the channels, as shown in S6A Fig. The retarding of the 26.5 ng pulse seen in this model can be interpreted as follows: As the uptake increases, and hence the intracellular auxin concentrations rise, saturation makes the lateral permeability effectivel...
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