Search results for "Portal imaging"

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QA of dynamic MLC based on EPID portal dosimetry.

2010

Abstract Purpose Dynamic delivery of intensity modulated beams (dIMRT) requires not only accurate verification of leaf positioning but also a control on the speed of motion. The latter is a parameter that has a major impact on the dose delivered to the patient. Time consumed in quality assurance (QA) procedures is an issue of relevance in any radiotherapy department. Electronic portal imaging dosimetry (EPID) can be very efficient for routine tests. The purpose of this work is to investigate the ability of our EPID for detecting small errors in leaf positioning, and to present our daily QA procedures for dIMRT based on EPID. Methods and materials A Varian 2100 CD Clinac equipped with an 80 …

Quality ControlReproducibilityComputer sciencebusiness.industryElectrical Equipment and SuppliesSmall deviationsEpid dosimetryBiophysicsGeneral Physics and AstronomyGeneral MedicineLinear particle acceleratorPortal imagingGap widthDosimetryRadiology Nuclear Medicine and imagingbusinessRadiometryQuality assuranceSimulationBiomedical engineeringPhysica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)

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