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- W2353582497 abstract "Objective To compare radiation dose,image quality and diagnosis in patients undergoing 320-detector computed tomography (CT) coronary angiography with prospective and retrospective electrocardiographic (ECG) gating. Methods Coronary computed tomography angiography (CCTA) with prospective (group P,n=250) and retrospective (group R,n=250 ) ECG gating were performed in 500 consecutive patients with suspected coronary artery disease and heart rate less than 65 bpm,and the effective radiation dose,image quality and diagnosis were evaluated. Results In each 3750 segments (250 patients ×15 segments per patient) in group P and group R,131 (3.49%) and 142 (3.78%) were found too small (1.5 mm) to be characterized,while 96.51%(3619/3750) and 96.12% (3608/3750) segments could be evaluated,and no statistical difference in images score was detected in group P and group R (P0.05). Mean radiation dose was significantly different in group P ([3.36±1.00] mSv) and group R ([13.46±2.30] mSv) (P0.01). Compared with CAG,the sensitivity,specificity,false positive and false negative value in group P (93.22%,99.21%,91.64%,99.05%) and R (94.55%,98.80%,95.86%,98.54%) were not significantly different. Conclusion 320-detector CT coronary angiography performed with prospective ECG gating has lower radiation dose compared with retrospective ECG gating,while image quality and diagnosis has no significant difference." @default.
- W2353582497 created "2016-06-24" @default.
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- W2353582497 date "2010-01-01" @default.
- W2353582497 modified "2023-09-25" @default.
- W2353582497 title "Prospective and retrospective ECG gating for 320-detector CT of the coronary arteries:Comparison of radiation dose,image quality and diagnosis" @default.
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