| Project/Area Number |
26670295
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Medical Physics and Radiological Technology
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 適応放射線治療 / 放射線治療 / 位置合わせ / 線量計算 |
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| Outline of Final Research Achievements |
In the treatment planning of radiation therapy, dose distribution is calculated using the CT images taken before treatment. In this process, beam parameters such as the irradiation direction and irradiation field shape are optimized. In order to realize the optimized dose distribution in a daily treatment, the patient set-up are performed based on the image registration between the X-ray image taken at the treatment time and the CT image used in the planning time. However, since a human body is not rigid object, there is no guarantee that the coincidence of the image is the same as the coincidence of the dose distribution. In this study, we investigated a method to improve the dose distribution by adjusting the dose parameters at each treatment time based on the dose calculation using CT images acquired at each treatment time, and clarified the degree of improvement which can be achieved by this method.
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