관상동맥 조영술 시 영상 저장 방법에 따른 선량의 감소 효과와 화질평가

초록

This study evaluated the effects of dose reduction and image quality based on storage methods in coronary angiography. Using five commonly used views—AP view (0°, 0°), LAO Cranial view (30°, 40°), LAO Caudal view (45°, 30°), RAO Caudal view (30°, 20°), and RAO Cranial view (30°, 30°)—we compared doses by measuring Air Kerma and Dose Area Product (DAP) values. Image quality was assessed by calculating the Contrast to Noise Ratio (CNR) and Signal to Noise Ratio (SNR) using MATLAB. Comparing the control group using cine imaging storage methods with the experimental group using simple fluoroscopy methods, we found that the average Air Kerma value was reduced by up to 87.3%, with an average reduction of 77.1% across the five views. The average DAP value decreased by up to 87.9%, with an average reduction of 78.1%, and we confirmed statistically significant reductions in average Air Kerma and DAP values across all five views. In terms of image quality, the control group showed significantly higher SNR and CNR values in the RAO cranial, LAO cranial, and True AP views, while the experimental group had higher SNR and CNR values in the RAO caudal view. In the LAO caudal view, the experimental group also did not show a statistically significant difference at 1point. However, the CNR value was higher, and the SNR values were significantly higher in the experimental group at both points. In conclusion, using simple fluoroscopy for image storage in coronary angiography is an effective method for reducing radiation dose compared to cine imaging methods.

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