PMID: 2112121May 1, 1990Paper

Shielding considerations for an operating room based intraoperative electron radiotherapy unit

International Journal of Radiation Oncology, Biology, Physics
M D MillsE B Dally

Abstract

The leakage radiation characteristics of a dedicated intraoperative radiotherapy linear accelerator have been measured on a machine designed to minimize the shielding required to allow it to be placed in an operating room suite. The scattering foil design was optimized to produce a flat beam for the field sizes employed while generating minimal bremsstrahlung contamination over the available energy range. More lead shielding was used in the treatment head than is used in conventional accelerators. A small amount of borated polyethylene shielding was also employed since neutron production was present at measurable levels. The room shielding installed in the operating room was demonstrated to be adequate to treat at least 20 patients each month to an average dose of 20 Gy. The worst case exposure was found to be 73% maximum permissible exposure. Administrative control was required for adjoining areas when calibrations and maintenance were performed.

References

Jul 1, 1984·Medical Physics·J R PaltaC Tannanonta

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Citations

Jul 1, 1993·Annals of Surgery·D B EvansT A Rich
Nov 18, 2009·Journal of Applied Clinical Medical Physics·Frank W Hensley
May 22, 2009·Journal of Applied Clinical Medical Physics·Mario CioccaUmberto Veronesi
Jul 1, 1991·International Journal of Radiation Oncology, Biology, Physics·C E NyerickK R Hogstrom
Jun 23, 2006·Physics in Medicine and Biology·Kenneth R Hogstrom, Peter R Almond
Oct 17, 2001·Journal of Applied Clinical Medical Physics·J L Daves, M D Mills
Nov 18, 2010·Journal of Applied Clinical Medical Physics·Alexandre S KrechetovMichael D Mills

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