A Comparison of Four Commercial Radiation Treatment Planning Systems for Prostate Intensity Modulated Radiation Therapy

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  • Sasaki Motoharu
    Department of Radiology, Tokushima University Hospital
  • Ikushima Hitoshi
    Graduated School of Health Science, University of Tokushima
  • Nakaguchi Yuji
    Department of Radiological Technology, Kumamoto University Hospital
  • Kishi Tarou
    Department of Radiology, Tokushima University Hospital
  • Kimura Masashi
    Department of Radiology, Tokushima University Hospital Current address: Department of Radiation Oncology, University of Tsukuba
  • Bandou Ryouta
    Department of Radiology, Tokushima University Hospital
  • Oita Masataka
    Graduated School of Health Science, University of Okayama

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Other Title
  • 複数の治療計画装置を用いた前立腺IMRT計画の比較検討
  • フクスウ ノ チリョウ ケイカク ソウチ オ モチイタ ゼンリツセン IMRT ケイカク ノ ヒカク ケントウ

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Abstract

At present, every manufacturer of intensity modulated radiation therapy (IMRT) equipment uses multi-leaf collimators (MLCs); however, each company’s intensity modulation methods and dose calculation algorithms differ. This study used four typical radiation treatment planning systems (RTPSs) employed domestically for prostate IMRT plans to carry out 15 case studies by one planner based on the dose limits at this clinic. The results were used to compare the differences, if any, in RTPS treatment plans. With prostate IMRT plans, an overlap area exists between the PTV and the rectum. For this reason, while observing dose limits of 60–75 Gy (within the dose tolerated by the rectum), securing uniformity and concentration of dose is essential to create the most appropriate treatment plan for the PTV and other targets. Although each RTPS uses different planning methods, it was generally possible to observe this clinic’s dose limits by adjusting the parameter values. When identical beam data is used, it is possible to create similar treatment plans.

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