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J Korean Soc Ther Radiol > Volume 11(2); 1993 > Article
Journal of the Korean Society for Therapeutic Radiology 1993;11(2): 455-461.
Dose Characteristics for IORT Applicator of ML-15MDX Electron Beam
Tae Jin Choi, Ho Joon Lee, Yeung Ae Kim, Jin Hee Kim, Ok Bae Kim
Department of Therapeutic Radiology, School of Medicine, Keimyung Universitf, Taegu, Korea.
ABSTRACT
Experimental measurements of dose characteristics with pentagonal applicator at nominal energy of 4, 6, 9, 12 and 15 MeV electron beam were performed for intraoperative radiotherapy (IORT) in ML-15MDX linear accelerator. This paper presents the percent depth dose, surface dose, beam flatness and output factors of using the IORT applicator in different electron beam energy. The output factor showed as a 24 percent higher in IORT applicator than that of reference 10x10 cm? applicator. The surface dose of using the IORT applicator showed 7.7 and 2.7 percent higher than that of reference field in 4 and 15 MeV electron beam, respectively. In our experiments, the variation of percent depth dose was very small but the output factor and flatness at 0.5 cm depth have showed a large value in IORT applicator.
Key Words: IORT cone, Electron Dosimetry
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