نتایج جستجو برای: treatment planning system
تعداد نتایج: 3598653 فیلتر نتایج به سال:
nowadays, planning is no longer considered merely a scientific and technical career nor agovernment responsibity. it rather functions as a bridge connecting the planners to institutional changes. in otherwords, the planning theory does not develop in a social, economic and political vacuum, but is formulated byindividuals in social situations with the aim of clarifying the enviroment recommendi...
Introduction: Considering the importance of information, providing the management with a reliable information system, can facilitate decision making regarding planning, organizing and controlling. This study aimed to analyze and evaluate information needs of managers at vice - chancellorship for treatment in Iranian medical science universities. Methods: This cross-sectional study was car...
abstract the purpose of this study is twofold: on the one hand, it is intended to see what kind of noticing-the –gap activity (teacher generated vs. learner generated) is more efficient in teaching l2 grammar in classroom language learning. on the other hand, it is an attempt to determine which approach of the noticing-the-gap- activity is more effective in the long- term retention of grammar...
Background: Use of contrast agents (CAs) during CT simulation for treatment planing system leads to changes in electron density. In this study we aimed to investigate the effect on calculated dose of various concentrations of CAs on treatment planing systems in different dose calculation algorithms. Materials and Methods: Contrast agent (0.769 mg/ml Iopromid) - water mixtures at con...
Quality assurance dosimetry often requires the comparison of measured doses with those calculated by a treatment-planning system for phantoms of density other than 1.000 g/cm3. The presence of an artifact in the Pinnacle3 treatment-planning system can lead to systematic errors in such cases. These errors are also present, although reduced in magnitude, in heterogeneous media.
Radiation therapy, an increasingly available and effective cancer treatment solution, involves sophisticated machinery as well as careful planning. Interactive 3D simulations combined with accurate 3D patient specific data can improve the planning process saving time and resources in generating the optimal treatment plan. We illustrate the potential of X3D in radiation therapy, specifically rad...
Background & Aim: Genitalia system cancers are the third most common cancers. In females, surgery and/or radiotherapy±chemotherapy are treatments of choice for cervical, endometrial or vaginal cancers. Brachytherapy is a complementary part of External Beam Radiotherapy(EBRT). MDR(Medium Dose Rate) brachytherapy in female genitalia cancers is founded on two bases: high and appropriate dose d...
background: in the current study the effect of shielded colpostat on rectum received dose was calculated in cervical brachytherapy using monte carlo (mc) method. materials and methods: two 60co sources of gzp6 brachytherapy unit used for intracavitary treatments were simulated using mcnpx monte carlo code. also the two types of colpostats including shielded and unshielded were simulated inside ...
The purpose of this paper is to demonstrate that an inexpensive 3D printer can be used to manufacture patient-specific bolus for external beam therapy, and to show we can accurately model this printed bolus in our treatment planning system for accurate treatment delivery. Percent depth-dose measurements and tissue maximum ratios were used to determine the characteristics of the printing materia...
addiction is a phenomenon that causes structural changes in different systems of society. studies show for planning of addiction prevention and treatment, it is necessary to create an information management system. substance dependence information systems refer to systems which collect, analyse and report data related to substance dependence information. the aim of this study was to identify ad...
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