PO-0789: MLC leaf position stability of a 160-leaf MLC measured using EPID
نویسندگان
چکیده
منابع مشابه
Evaluation of two methods of predicting MLC leaf positions using EPID measurements.
In intensity modulated radiation treatments (IMRT), the position of the field edges and the modulation within the beam are often achieved with a multileaf collimator (MLC). During the MLC calibration process, due to the finite accuracy of leaf position measurements, a systematic error may be introduced to leaf positions. Thereafter leaf positions of the MLC depend on the systematic error introd...
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The purpose of this study was to experimentally quantify the change in response of an amorphous silicon (a-Si) electronic portal imaging device (EPID) to dynamic multileaf collimator (dMLC) beams with varying MLC-transmitted dose components and incorporate the response into a commercial treatment planning system (TPS) EPID prediction model. A combination of uniform intensity dMLC beams and stat...
متن کاملQuality assurance of MLC leaf position accuracy and relative dose effect at the MLC abutment region using an electronic portal imaging device
We investigated an electronic portal image device (EPID)-based method to see whether it provides effective and accurate relative dose measurement at abutment leaves in terms of positional errors of the multi-leaf collimator (MLC) leaf position. A Siemens ONCOR machine was used. For the garden fence test, a rectangular field (0.2 20 cm) was sequentially irradiated 11 times at 2-cm intervals. Dev...
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Background: Respiratory motion causes thoracic movement and reduces targeting accuracy in radiotherapy. Objective: This study proposes an approach to generate a model to track lung tumor motion by controlling dynamic multi-leaf collimators. Material and Methods: All slices which contained tumor were contoured in the 4D-CT images for...
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MLC++, the Machine Learning library in C++ is a set of libraries and utilities that can aid developers in interfacing machine learning technology, aid users in selecting an appropriate algorithm for a given task, and aid researchers in developing new algorithms, especially hybrid algorithms and multi-strategy algorithms. D2.1.2.1 Motivation for MLC++ A learning algorithm cannot outperform any o...
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ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2013
ISSN: 0167-8140
DOI: 10.1016/s0167-8140(15)33095-4