Abstract
We examined the effects of a reduced exposure dose on the quality of images from an angiography device augmented with a noise reduction algorithm. Before its clinical application, we compared the diameter of the discrimination limit of the hole with that in the conventional method by a visual evaluation with a contrast-detail (C-D) phantom imaged using the target dose. Based on the results, a reducible dose was determined and applied clinically. The sample population consisted of patients being followed up after percutaneous coronary intervention (PCI) for coronary artery disease; we evaluated the effects of the exposure reduction on image quality. A significant dose reduction was observed by the noise-reduction method compared to the conventional method; the radiation dose to the flat panel detector (FPD) could be reduced to 70 nGy per frame. Clinically, a dose reduction of approx. 40% was obtained while maintaining image quality almost equal to that of the conventional method.
Original language | English |
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Pages (from-to) | 153-164 |
Number of pages | 12 |
Journal | Acta medica Okayama |
Volume | 72 |
Issue number | 2 |
Publication status | Published - 2018 |
Keywords
- Contrast-detail phantom
- Image quality
- Noise reduction
- Percutaneous coronary intervention
- Radiation dose
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)