Evaluation of Maximum Dose Position Shifting in Phantom in X-ray CT

DOI Web Site 参考文献6件
  • HABA Tomonobu
    Department of Radiological Technology, Graduate School of Medicine, Nagoya University
  • KOYAMA Shuji
    Department of Radiological Technology, Graduate School of Medicine, Nagoya University

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In this study, the maximum dose position shifting in cone beam CT (CBCT) was analyzed in detail using Monte Carlo simulation method. The simulation was carried out on the assumption of 320 detector row CBCT. Our results show that maximum dose position is 18 mm depth from the phantom surface, and peak deposit energy is 11 % higher than the phantom surface dose. In the CBCT, peripheral position dose is underestimated using conventional weighted CTDI estimation method.

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