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Comparison of dose calculated by an intensity modulated radiotherapy treatment planning system and an independent monitor unit verification program.

Journal of applied clinical medical physics / American College of Medical Physics

Software Validation, Abdomen, Software, radiation effects, Rectum, methods, instrumentation, Radiotherapy, High-Energy, Radiotherapy Planning, Computer-Assisted, standards, Radiotherapy Dosage, Radiation Monitoring, Prostate, Pelvis, Neck, Male, Humans, Head, Female, Anal Canal

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      A comparison of isocenter dose calculated by a commercial intensity modulated radiation therapy treatment planning system and independent monitor unit verification calculation (MUVC) software was made. The percent disparity between the treatment plan and MUVC doses were calculated for 507 treatments (head and neck, prostate, abdomen, female pelvis, rectum and anus, and miscellaneous) from 303 patients. The MUVC calculated dose was, on average, 1.4% higher than the treatment planning dose, with a 1.2% standard deviation. The distribution of the disparities appeared to be Gaussian in shape with some variation by treatment site. Based on our analysis, disparities outside the range of +/-3% about the mean value should be checked and resolved prior to treatment delivery. (c) 2003 American College of Medical Physics.

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