| IMRT delivery performance with a varian multileaf collimator. | |
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MedLine Citation:
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PMID: 18406945 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The use of a multileaf collimator (MLC) for intensity-modulated radiotherapy poses unique dosimetric issues. The nature of intensity-modulated radiotherapy dosimetry, centered on leaf position accuracy, is common to all MLCs. However, the mechanical and software designs of MLCs from the different manufacturers distinguish them. This report focused on the Varian Millennium 120, although the concepts are applicable to the earlier Varian Mark series as well. The factors that affect dose delivery in clinical fields (i.e., mechanical tolerances, motor fatigue, and latency effects) have been quantified. Moreover, inadequate modeling of the MLC in the planning system can be perceived as erratic performance. Individually, some problems have been shown to be insignificant; others are correctable using software. If these problems are rectified or at least understood by the physicist, quality assurance can be simplified. |
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Authors:
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Thomas Losasso |
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Publication Detail:
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Type: Evaluation Studies; Journal Article |
Journal Detail:
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Title: International journal of radiation oncology, biology, physics Volume: 71 ISSN: 0360-3016 ISO Abbreviation: Int. J. Radiat. Oncol. Biol. Phys. Publication Date: 2008 |
Date Detail:
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Created Date: 2008-04-14 Completed Date: 2008-06-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7603616 Medline TA: Int J Radiat Oncol Biol Phys Country: United States |
Other Details:
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Languages: eng Pagination: S85-8 Citation Subset: IM |
Affiliation:
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Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. losassot@mskcc.org |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Calibration
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standards Equipment Design Equipment Failure Analysis Mechanics Particle Accelerators / instrumentation, standards* Quality Control Radiotherapy Dosage Radiotherapy Planning, Computer-Assisted / standards* Radiotherapy, Intensity-Modulated / instrumentation*, standards Scattering, Radiation Software / standards* Technology, Radiologic / instrumentation, standards |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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