Small photon beam measurements using radiochromic film and Monte Carlo simulations in a water phantom

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• 作者：Olivia A. Garc&#xed ; a-Garduñ ; o ; José ; M. Lá ; rraga-Gutié ; rrez ; Mercedes Rodr&#xed ; guez-Villafuerte ; Arnulfo Mart&#xed ; nez-Dá ; valos ; Miguel A. Celis
• 关键词：Small photon beams ; Monte Carlo ; Film dosimetry ; Stereotactic radiosurgery
• 刊名：Radiotherapy and Oncology
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：96
• 期：2
• 页码：250-253
• 全文大小：188 K

文摘

This work reports the use of both GafChromic EBT film immersed in a water phantom and Monte Carlo (MC) simulations for small photon beam stereotactic radiosurgery dosimetry. Circularly collimated photon beams with diameters in the 4–20 mm range of a dedicated 6 MV linear accelerator (Novalis®, BrainLAB, Germany) were used to perform off-axis ratios, tissue maximum ratios and total scatter factors measurements, and MC simulations. GafChromic EBT film data show an excellent agreement with MC results (<2.7 % ) for all measured quantities.