نتایج جستجو برای: dose volume parameters
تعداد نتایج: 1140398 فیلتر نتایج به سال:
BACKGROUND To determine appropriate timing of an adaptive radiation therapy (ART) replan by evaluating anatomic and dosimetric changes of target volumes and organs at risk (OARs) during intensity-modulated radiation therapy (IMRT) for nasopharyngeal carcinoma (NPC). METHODS Nineteen NPC patients were recruited. Each patient had repeat computed tomography (CT) scans after each five fractions a...
introduction: the complex geometry of breast and also lung and heart inhomogeneities near the planning target volume (ptv) result in perturbations in dose distribution. this problem can result in overdosage or underdosage in the match region of the three treatment fields. the purpose of this study is to create a homogeneous dose distribution in the match region between the supraclavicular and t...
PURPOSE To develop a method of predicting the values of dose distribution parameters of different radiosurgery techniques for treatment of arteriovenous malformation (AVM) based on internal geometric parameters. METHODS AND MATERIALS For each of 18 previously treated AVM patients, four treatment plans were created: circular collimator arcs, dynamic conformal arcs, fixed conformal fields, and ...
in this study the effects of the most popular anaesthetics including: ms222, clove oil (eugenia caryophyllata) and 2-phenoxyethanol, on some haematological and serum enzymes of cyprinus carpio were investigated. firstly the effective dose of each anaesthetics (3 minutes for anesthesia and 5 minutes for recovery ) and lc50 of them were calculated in c. carpio. fish were anaesthetized with the ef...
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