| 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)
|
|---|
| 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.
|
