Effect of sharpening filter on vessel diameter measured by quantitative coronary arteriography |
| |
Authors: | Arai Hiroaki Hosonuma Naoya Gou Misako Ueno Takashi |
| |
Institution: | Department of Radiology, Cardiovascular Institute Hospital. |
| |
Abstract: | At cardiac catheterization, analog images obtained using cinefilm are translated into digital images, and images appearing on the CRT are filtered by a sharpen filter. We investigated the effect of the sharpening filter on vessel diameter as measured by quantitative coronary arteriography. We acquired images of a vessel phantom filled with contrast material using an X-ray image intensifier. Vessel diameters measured by quantitative coronary arteriography were 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, and 6 mm. Results showed that vessel diameters were decreased when the sharpening filter was used and that more intense filtering decreased the measured diameter further. When the diameter of the vessel phantom was less than 4 mm, the diameter was smaller and the ratio of decrease was larger. Vessel diameters of 2 mm, 3 mm, 4 mm, and 6 mm measured a maximum of 2.9 smaller, while those of 1 mm and 1.5 mm measured a maximum of 9.2 smaller. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|