Varian HDR surface applicators — commissioning and clinical implementation
نویسندگان
چکیده
منابع مشابه
Varian HDR surface applicators — commissioning and clinical implementation
The purpose of this study was to validate the dosimetric performance of Varian surface applicators with the source vertically positioned and develop procedures for clinical implementation. The Varian surface applicators with the source vertically positioned provide a wide range of apertures making them clinically advantageous, though the steep dose gradient in the region of 3-4 mm prescription ...
متن کاملCommissioning of Varian ring & tandem HDR applicators: reproducibility and interobserver variability of dwell position offsets
Studies have shown that source dwells within Varian's HDR CT/MR compatible ring applicators can deviate from intended positions by several millimeters. Quantifying this offset is an important part of commissioning. The aims of this study were to: 1) determine the reproducibility of the offset, 2) study the interobserver variation in the offset's measurement, and 3) quantify the dosimetric impac...
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PURPOSE To quantify the dwell position inaccuracy in Titanium ring applicators and develop a test to be performed quarterly, after source exchange. METHODS All three rings from our Titanium kit (30, 45, 60 deg.) were used for this study. EDR2 film was placed on the Simulator table and a ring was taped to the film, with a solid water slab as buildup. A 1-cm spacing dummy wire was inserted into...
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Varian has issued two Product Notification Letters warning of known inaccuracies in dwell positions for their GammaMed HDR ring applicator. This inaccuracy was measured for two sets of applicators. Autoexposed radiographs were taken of the HDR source at different dwell positions and analyzed per Varian recommendations using tools within the BrachyVision treatment planning program. Comparison be...
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ژورنال
عنوان ژورنال: Journal of Applied Clinical Medical Physics
سال: 2016
ISSN: 1526-9914,1526-9914
DOI: 10.1120/jacmp.v17i2.6033