Proceedings of the Korean Society of Medical Physics Conference (한국의학물리학회:학술대회논문집)

Korean Society of Medical Physics (한국의학물리학회)
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A New Method for Measuring the Dose Distribution of the Radiotherapy Domain using the IP

  • Homma, Mitsuhiko (Dept. of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan) ;
  • Tabushi, Katsuyoshi (Dept. of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan) ;
  • Obata, Yasunori (Dept. of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan) ;
  • Tamiya, Tadashi (Dept. of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan) ;
  • Koyama, Shuji (Dept. of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan) ;
  • Kurooka, Masahiko (Dept. of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan) ;
  • Shimomura, Kouhei (Dept. of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Japan) ;
  • Ishigaki, Takeo (Dept. of Radiology, Nagoya University School of Medicine, Nagoya, Japan)
  • Published : 2002.09.01
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Abstract

Knowing the dose distribution in a tissue is as important as being able to measure exposure or absorbed dose in radiotherapy. Since the Dry Imager spread, the wet type automatic processor is no longer used. Furthermore, the waste fluid after film development process brings about a serious problem for prevention of pollution. Therefore, we have developed a measurement method for the dose distribution (CR dosimetry) in the phantom based on the imaging plate (IP) of the computed radiography (CR). The IP was applied for the dose measurement as a dosimeter instead of the film used for film dosimetry. The data from the irradiated IP were processed by a personal computer with 10 bits and were depicted as absorbed dose distributions in the phantom. The image of the dose distribution was obtained from the CR system using the DICOM form. The CR dosimetry is an application of CR system currently employed in medical examinations to dosimetry in radiotherapy. A dose distribution can be easily shown by the Dose Distribution Depiction System we developed this time. Moreover, the measurement method is simpler and a result is obtained more quickly compared with film dosimetry.

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