Lateral Penumbra Modelling Based Leaf End Shape Optimization for Multileaf Collimator in Radiotherapy
نویسندگان
چکیده
منابع مشابه
Lateral Penumbra Modelling Based Leaf End Shape Optimization for Multileaf Collimator in Radiotherapy
Lateral penumbra of multileaf collimator plays an important role in radiotherapy treatment planning. Growing evidence has revealed that, for a single-focused multileaf collimator, lateral penumbra width is leaf position dependent and largely attributed to the leaf end shape. In our study, an analytical method for leaf end induced lateral penumbra modelling is formulated using Tangent Secant The...
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An important method in cancer treatment is the use of high energetic radiation. In order to kill tumor cells the patient is exposed to radiation that is delivered by a linear accelerator whose beam head can be rotated about the treatment couch. Inevitably the healthy tissue surrounding the tumor is also exposed to some radiation. So the problem arises to arrange the treatment in a way such that...
متن کاملRounded leaf end effect of multileaf collimator on penumbra width and radiation field offset: an analytical and numerical study
BACKGROUND Penumbra characteristics play a significant role in dose delivery accuracy for radiation therapy. For treatment planning, penumbra width and radiation field offset strongly influence target dose conformity and organ at risk sparing. METHODS In this study, we present an analytical and numerical approach for evaluation of the rounded leaf end effect on penumbra characteristics. Based...
متن کاملOptimal Multileaf Collimator Leaf Sequencing in IMRT Treatment Planning
We consider a problem dealing with the efficient delivery of Intensity Modulated Radiation Therapy (IMRT) to individual patients. IMRT treatment planning is usually performed in three phases. The first phase determines a set of beam angles through which radiation is delivered, followed by a second phase that determines an optimal radiation intensity profile (or fluence map). This intensity prof...
متن کاملDetermining the optimal dosimetric leaf gap setting for rounded leaf‐end multileaf collimator systems by simple test fields
Individual QA for IMRT/VMAT plans is required by protocols. Sometimes plans cannot pass the institute's QA criteria. For the Eclipse treatment planning system (TPS) with rounded leaf-end multileaf collimator (MLC), one practical way to improve the agreement of planned and delivered doses is to tune the value of dosimetric leaf gap (DLG) in the TPS from the measured DLG. We propose that this ste...
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ژورنال
عنوان ژورنال: Computational and Mathematical Methods in Medicine
سال: 2016
ISSN: 1748-670X,1748-6718
DOI: 10.1155/2016/9515794