Can a commercially available EPID dosimetry system detect small daily patient setup errors for cranial IMRT/SRS?
نویسندگان
چکیده
منابع مشابه
Pixel response‐based EPID dosimetry for patient specific QA
Increasing use of high dose rate, flattening filter free (FFF), and/or small-sized field beams presents a significant challenge to the medical physics community. In this work, we develop a strategy of using a high spatial resolution and high frame rate amorphous silicon flat panel electronic portal imaging device (EPID) for dosimetric measurements of these challenging cases, as well as for conv...
متن کاملEvaluation of a fast method of EPID-based dosimetry for IMRT and Comparison with 3D EPID-based dosimetry system using conventional two- and three-dimensional detectors for VMAT
Introduction: Electronic portal imaging devices (EPIDs) could potentially be useful for intensity-modulated radiation therapy (IMRT) and VMAT QA. The data density, high resolution, large active area, and efficiency of the MV EPID make it an attractive option. However, EPIDs were designed as imaging devices, not dosimeters, and as a result they do not inherently measure dose in ...
متن کاملThe physical characteristics of a SLIC-EPID for transmitted dosimetry
ABSTRACT Background: for treatment verification in radiation therapy. Several physical characteristics of ScanningLiquid filled Ionization Chamber EPID (SLIC-EPID) including: extra build-up layer,reproducibility and uniformity, and noise level were investigated.Electronic Portal Imaging Devices (EPIDs) have found an outstanding positionMaterials and Methods: equilibrium, 1-30 mm white water mat...
متن کاملEPID in vivo Dosimetry
Introduction: The most modern radiotherapy devices are equipped with an Electronic Portal Imaging Device (EPID) system which is located on opposite side of the machine’s head. EPID system is often used to setting up the position verification during or between radiotherapy sessions. Material and Methods: Various types of dosimeters have been used to setting up ...
متن کاملEPID based in vivo dosimetry system: clinical experience and results
Mandatory in several countries, in vivo dosimetry has been recognized as one of the next milestones in radiation oncology. Our department has implemented clinically an EPID based in vivo dosimetry system, EPIgray, by DOSISOFT S.A., since 2006. An analysis of the measurements per linac and energy over a two-year period was performed, which included a more detailed examination per technique and t...
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ژورنال
عنوان ژورنال: Practical Radiation Oncology
سال: 2017
ISSN: 1879-8500
DOI: 10.1016/j.prro.2016.12.005