IMRT delivery performance with a varian multileaf collimator Journal Article
| Author: | LoSasso, T. |
| Article Title: | IMRT delivery performance with a varian multileaf collimator |
| Abstract: | 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. © 2008 Elsevier Inc. All rights reserved. |
| Keywords: | intensity modulated radiation therapy; radiation dose; accuracy; quality control; radiotherapy dosage; radiotherapy; calibration; radiotherapy, intensity-modulated; dosimetry; quality assurance; quantitative analysis; computer simulation; intensity modulation; collimator; radiotherapy planning, computer-assisted; equipment design; computer program; software; particle accelerators; monte carlo method; equipment failure analysis; scattering, radiation; latent period; software design; technology, radiologic; mechanics; millennium; multileaf collimation; varian; computer software; varian mark series; varian millennium 120; muscle fatigue |
| Journal Title: | International Journal of Radiation Oncology, Biology, Physics |
| Volume: | 71 |
| Issue: | 1 SUPPL. |
| ISSN: | 0360-3016 |
| Publisher: | Elsevier Inc. |
| Date Published: | 2008-05-01 |
| Start Page: | S85 |
| End Page: | S88 |
| Language: | English |
| DOI: | 10.1016/j.ijrobp.2007.06.082 |
| PUBMED: | 18406945 |
| PROVIDER: | scopus |
| DOI/URL: | |
| Notes: | --- - "Cited By (since 1996): 6" - "Export Date: 17 November 2011" - "CODEN: IOBPD" - "Source: Scopus" |
