PV-0187: Source dwell time and transit time measurement for a HDR afterloading unit
نویسندگان
چکیده
منابع مشابه
Independent assessment of source transit time for the BEBIG SagiNova® high dose rate brachytherapy afterloader
Introduction: The dwell time and transit time components contribute to the overall delivered dose to patients in high dose rate (HDR) brachytherapy treatments. The transit time results from source entry and exit as well as source movements between dwell positions. It depends on various parameters such as the source speed profile, source indexer distance to dwell position, and ...
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The influence of deviations in dwell times and source positions for (192)Ir HDR-RALS was investigated. The potential dose errors for various kinds of brachytherapy procedures were evaluated. The deviations of dwell time ΔT of a (192)Ir HDR source for the various dwell times were measured with a well-type ionization chamber. The deviations of source position ΔP were measured with two methods. On...
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The most accurate classical dose optimization algorithms in HDR brachytherapy strongly depend on an appropriate selection of source dwell positions which fulfill user-defined geometrical boundary conditions which are relative to patient anatomy. Most anatomical situations, such as for prostate and head and neck tumors, are complex and can require geometries with 5-15 catheters with 48 possible ...
متن کاملNew method for obtaining position and time structure of source in HDR remote afterloading brachytherapy unit utilizing light emission from scintillator
When using a HDR remote afterloading brachytherapy unit, results of treatment can be greatly influenced by both source position and treatment time. The purpose of this study is to obtain information on the source of the HDR remote afterloading unit, such as its position and time structure, with the use of a simple system consisting of a plastic scintillator block and a charge-coupled device (CC...
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Material and Methods: A total of six patients were included in this study. Each patient was scanned with one of two T2weighted sequences, inversion recovery fast spin echo (IR FSE) or fast recovery fast spin echo (FRFSE). To reduce the motion artefacts in the images, the scanning was only triggered when the diaphragm was at the end-exhale position. The imaging was performed on a 3.0 T MR (GE He...
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ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2017
ISSN: 0167-8140
DOI: 10.1016/s0167-8140(17)30630-8