Journal article
Clinical dosimetry for implementation of a multileaf collimator
Medical physics (Lancaster), Vol.19(5), pp.1255-1261
09/1992
DOI: 10.1118/1.596757
PMID: 1435606
Abstract
In order to initiate the use of a multileaf collimator (MLC) in the clinic, a set of technical procedures needs to be available sufficient to create MLC leaf settings and to deliver an accurate dose of radiation through the MLC‐shaped field. Dosimetry data for clinical use of the MLC were measured. Dosimetric characteristics included central axis percent depth dose, output factors, and penumbra. In this paper, it has been concluded that a dose control monitor unit calculation procedure that has been applied to the use of conventional secondary field‐shaping blocks can be applied to the multileaf collimator dosimetry. The multileaf collimator penumbra (20% to 80%) is only slightly wider (1–3 mm) than the penumbra of the conventional collimator jaws. Beam’s‐eye‐view comparisons made between the isodose curves in fields shaped by conventional Cerrobend blocks and isodose curves in fields shaped by the multileaf collimator demonstrated that the 50% isodose line at 10‐cm depth exhibited the discrete steps of the multileaf collimator leaves, but that the 90% and 10% isodose curves of the multileaf were close to those shaped by Cerrobend blocks.
Details
- Title: Subtitle
- Clinical dosimetry for implementation of a multileaf collimator
- Creators
- Arthur L Boyer - Department of Radiation Physics, The University of Texas M.D. Anderson Cancer, Center, Houston, Texas 77030Timothy G Ochran - Department of Radiation Physics, The University of Texas M.D. Anderson Cancer, Center, Houston, Texas 77030Carl E Nyerick - Department of Radiation Physics, The University of Texas M.D. Anderson Cancer, Center, Houston, Texas 77030Timothy J Waldron - Department of Radiation Physics, The University of Texas M.D. Anderson Cancer, Center, Houston, Texas 77030Calvin J Huntzinger - Varian Associates, Medical Equipment, Palo Alto, California 94303
- Resource Type
- Journal article
- Publication Details
- Medical physics (Lancaster), Vol.19(5), pp.1255-1261
- DOI
- 10.1118/1.596757
- PMID
- 1435606
- ISSN
- 0094-2405
- eISSN
- 2473-4209
- Number of pages
- 7
- Date published
- 09/1992
- Academic Unit
- Radiation Oncology
- Record Identifier
- 9984047792402771
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