منابع مشابه
A survey on planar IMRT QA analysis
Quality assurance (QA) systems for intensity-modulated radiation therapy (IMRT) have become standard tools in modern clinical medical physics departments. However, because formalized industry standards or recommendations from professional societies have yet to be defined, methods of IMRT QA analysis vary from institution to institution. Understanding where matters stand today is an important st...
متن کاملA dose‐gradient analysis tool for IMRT QA
The use of intensity-modulated radiation therapy (IMRT) has led to an increase in the number of complex fields that require measurement and comparison to calculated dose distributions in 2D. Current dose-evaluation techniques, including isodose line comparisons, displays of the dose difference between calculated and measured distributions, and distance-to-agreement (DTA) comparisons, are useful...
متن کاملBreaking bad IMRT QA practice
Agreement between planned and delivered dose distributions for patient-specific quality assurance in routine clinical practice is predominantly assessed utilizing the gamma index method. Several reports, however, fundamentally question current IMRT QA practice due to poor sensitivity and specificity of the standard gamma index implementation. An alternative is to employ dose volume histogram (D...
متن کاملA comprehensive comparison study of three different planar IMRT QA techniques using MapCHECK 2
The purpose of this study is to determine comparability of three different planar IMRT QA techniques: patient gantry angle composite (PGAC), single gantry angle composite (SGAC), and field by field (FBF), using MapCHECK 2 device and the γ test as performance metrics; and to assess the dependency of these techniques on intensity modulation, couch attenuation, and detector position (angular depen...
متن کاملEfficient independent planar dose calculation for FFF IMRT QA with a bivariate Gaussian source model
The aim of this study is to perform a direct comparison of the source model for photon beams with and without flattening filter (FF) and to develop an efficient independent algorithm for planar dose calculation for FF-free (FFF) intensity-modulated radiotherapy (IMRT) quality assurance (QA). The source model consisted of a point source modeling the primary photons and extrafocal bivariate Gauss...
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ژورنال
عنوان ژورنال: Journal of Applied Clinical Medical Physics
سال: 2007
ISSN: 1526-9914
DOI: 10.1120/jacmp.v8i3.2448