| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
In order to perform accurate Monte Carlo simulation of X-ray CT, we developed an 8-channel X-ray energy analyzer and a single-channel spherical semiconductor dosimeter. The former is for measuring the X-ray energy and dose intensity for each fan angle of X-ray fan beams which are different for each model and scan condition of X-ray CT, and the latter is for accurately measuring the state of the X-ray tube current modulation during the CT scan. The basic data of various CT units obtained using these instruments were incorporated into the simulation code, and it was confirmed that the actual measurement and the calculation by the anthropomorphic phantom are consistent. Finally, Monte Carlo simulation by parallel calculation based on actual subject data was performed to estimate the organ dose.
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