Execution of mantle field with multileaf collimator: A simple approach
نویسندگان
چکیده
منابع مشابه
A new algorithm for optimal multileaf collimator field segmentation
We present a new efficient leaf sequencing algorithm for the generation of intensity maps by a nonnegative combination of segments. Intensity maps describe the intensity modulation of beams in radiotherapy. We only study the static case (stop and shoot) an optimize the total number of monitor units and the number of segments. We will present a short exact proof for a formula giving the smallest...
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ID: 7461 Title: Multileaf Collimator (MLC) for Field Matching Photon field matching at the beam isocenter using independent jaws is the method of choice in many radiation treatments that require abutted fields. This study evaluated the suitability of using Multileaf Collimator (MLC) for such matching. The study employed a treatment planning system to model the field matching and the modeling wa...
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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 کاملUse of a multileaf collimator to increase the field width achievable with a dynamic wedge
A method is proposed for generating dynamic wedges spanning the entire field width, defined as the collimator opening in the wedged direction, without changes to existing hardware. The technique approximates the fluence pattern of a dynamic wedge by sequentially closing the leaves of a 120-leaf multileaf collimator (MLC). Closure times for the individual leaves were derived by extending the seg...
متن کاملA duality based algorithm for multileaf collimator field segmentation with interleaf collision constraint
Intensity maps are nonnegative matrices describing the intensity modulation of beams in radiotherapy.An important step in the planning process is to determine a segmentation, that is a representation of an intensity map as a positive combination of special matrices corresponding to fixed positions of the multileaf collimator, called segments. We consider the problem of constructing segmentation...
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ژورنال
عنوان ژورنال: Journal of Cancer Research and Therapeutics
سال: 2008
ISSN: 0973-1482
DOI: 10.4103/0973-1482.39600