Experimental evaluation of the accuracy of skin dose calculation for a commercial treatment planning system

Laurence E. Court; Roy B. Tishler; Aaron M. Allen; Hong Xiang; Mike Makrigiorgos; Lee Chin

doi:10.1120/jacmp.v9i1.2792

Experimental evaluation of the accuracy of skin dose calculation for a commercial treatment planning system

Laurence E. Court^*, Roy B. Tishler, Aaron M. Allen, Hong Xiang, Mike Makrigiorgos, Lee Chin

^*Corresponding author for this work

Brigham and Women’s Hospital

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

The present work uses the Eclipse treatment planning system (TPS) to investigate the accuracy of skin dose calculations. Micro-MOSFETs (metal oxide semiconductor field effect transistors) were used to measure skin dose for a range of irradiation conditions (open fields, physical wedges, dynamic wedges, various source-to-surface distances) for 6-MV and 10-MV beams, and the results were compared with the calculated mean dose to a "skin" structure 2 mm thick for semi-cylindrical phantoms (representative of a neck or breast). Agreement between the calculated and measured skin dose values was better than ±20% for 95% of all measured points (6-MV and 10-MV X-ray spectra alike). For a fixed geometry, the TPS correctly calculated relative changes in dose, showing that minimization of skin dose in intensity-modulated radiation therapy will be effective in Eclipse.

Original language	English
Pages (from-to)	29-35
Number of pages	7
Journal	Journal of Applied Clinical Medical Physics
Volume	9
Issue number	1
DOIs	https://doi.org/10.1120/jacmp.v9i1.2792
State	Published - 2008
Externally published	Yes

Keywords

Dose calculations
MOSFET
Skin dose

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10.1120/jacmp.v9i1.2792

Cite this

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abstract = "The present work uses the Eclipse treatment planning system (TPS) to investigate the accuracy of skin dose calculations. Micro-MOSFETs (metal oxide semiconductor field effect transistors) were used to measure skin dose for a range of irradiation conditions (open fields, physical wedges, dynamic wedges, various source-to-surface distances) for 6-MV and 10-MV beams, and the results were compared with the calculated mean dose to a {"}skin{"} structure 2 mm thick for semi-cylindrical phantoms (representative of a neck or breast). Agreement between the calculated and measured skin dose values was better than ±20% for 95% of all measured points (6-MV and 10-MV X-ray spectra alike). For a fixed geometry, the TPS correctly calculated relative changes in dose, showing that minimization of skin dose in intensity-modulated radiation therapy will be effective in Eclipse.",

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AU - Makrigiorgos, Mike

AU - Chin, Lee

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Experimental evaluation of the accuracy of skin dose calculation for a commercial treatment planning system

Abstract

Keywords

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