2016 Fiscal Year Final Research Report
Development of respiratory phase segmentation algorithm based on the analysis of internal target motion for high accurate respiratory-gated radiation therapy
| Project/Area Number |
26460714
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Medical Physics and Radiological Technology
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 動体追跡放射線治療 / 4次元放射線治療 / 待ち伏せ照射 / 呼吸位相 |
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| Outline of Final Research Achievements |
Respiratory-gated irradiation is realized by monitoring three-dimensional location of internal fiducial marker in real-time tumor-tracking radiation therapy. Irradiation accuracy could be improved by monitoring respiratory phase in addition to the marker location. In this research, the novel algorithm of respiratory phase segmentation based on the analysis of three-dimensional trajectory data of the fiducial marker. Irradiation efficiency was evaluated from the log data retrospectively assuming that patient setup was conducted by proposed method. About 20 % of irradiation efficiency was obtained by proposed method even in the small gating windows size, +/- 1 mm. The evaluated efficiency was less than 10 % in conventional setup procedure. Hence, it is expected that the irradiation accuracy can be improved while keeping the acceptable irradiation efficiency.
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| Free Research Field |
医学物理学
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