A study of MU and compensators in total body irradiation using RTPS

DOI IR HANDLE Web Site Open Access
  • Terashima Shingo
    Department of Radiation Science, Hirosaki University Graduate School of Health Sciences
  • Komai Fumio
    Department of Radiology, Hirosaki University Hospital
  • Sugawara Hiromu
    Department of Medical Radiology, Tokyo Metropolitan Bokutoh Hospital
  • Takahashi Yuka
    Department of Radiation Technology, Iwate Prefectural Isawa Hospital
  • Kimura Naoki
    Department of Radiology, Hirosaki University Hospital
  • Yokoyama Koki
    Department of Radiology, Hirosaki University Hospital
  • Iwasaki Akira
    Department of Radiation Science, Hirosaki University Graduate School of Health Sciences
  • Hosokawa Yoichiro
    Department of Radiation Science, Hirosaki University Graduate School of Health Sciences
  • Suzaki Katsumasa
    Department of Radiology, Hirosaki University Hospital

Bibliographic Information

Other Title
  • RTPSを用いた全身照射におけるMU値及び補償物質の検討
  • RTPS オ モチイタ ゼンシン ショウシャ ニ オケル MUチ オヨビ ホショウ ブッシツ ノ ケントウ

Search this article

Abstract

Commercial radiation treatment planning system (RTPS) cannot be used in total body irradiation (TBI) using long source-axis distance (SAD) in many cases, mainly due to the treatment distance outside RTPS specification. We have considered whether it is possible to determine the prescribed MU and the thickness of the compensators at SAD 350 cm, 400 cm, using data calculated at SAD 300 cm which is the limit of RTPS of our own facility. The dose characteristics at long SAD were acquired and corrections were made so that the calculation result of RTPS at SAD 300 cm would be the value measured under the condition of long SAD. The maximum difference between the MU of this method and the MU irradiated to the patient was 3.6%. We got a good result of thickness of the compensators calculated for the femur and lower leg showed, however the differences were greater in other parts. Although some improvement is necessary, it was suggested that the prescribed MU and the thickness of the compensators presumed using RTPS can be used for TBI setup.

Journal

  • Hirosaki Medical Journal

    Hirosaki Medical Journal 70 (1), 47-55, 2019

    Hirosaki University Graduate School of Medicine,Hirosaki Medical Society

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top