A new technique for noise reduction at coronary CT angiography with multi-phase data-averaging and non-rigid image registration
| Project/Area Number |
24591765
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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 |
Radiation science
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
AWAI KAZUO 広島大学, 医歯薬保健学研究院, 教授 (30294573)
HIGAKI TORU 広島大学, 医歯薬保健学研究院, 特任助教 (80611334)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 冠動脈CT / ノイズ低減 |
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| Outline of Final Research Achievements |
The purpose of this study was to investigate the feasibility of a newly developed noise reduction technique at coronary CT angiography (CTA) that uses multi-phase data-averaging and non-rigid image registration. Sixty five patients underwent coronary CTA with prospective ECG-triggering. The range of the phase window was set at 70-80% of the R-R interval. First, three sets of consecutive volume data at 70-, 75-, and 80% of the R-R interval were prepared. Second, we applied non-rigid registration to align the 70- and 80% images to the 75% image. Finally, we performed weighted averaging of the three images and generated a de-noised image. Our method facilitated an image noise reduction of approximately 20% with improved image quality. Theoretically, it may be possible to reduce the radiation exposure by 36% at coronary CTA with prospective ECG-triggering.
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Report
(5 results)
Research Products
(4 results)
