Application of double-layer detector spectral CT motion correction reconstruction in patients with high heart rate
Objective To explore the application value of double-layer detector spectral CT motion correction reconstruction algorithm(MCR)in patients with high heart rate.Methods 30 patients with heart rate≥80 b/min in Renji Hospital,Shanghai Jiao Tong University were retrospectively included,all patients with the inclusion criteria completed coronary artery CT angiography,compared the standard reconstruction(STD)optimal phase and MCR images,compared the CNR and SNR of the two groups,and evaluated the quality of coronary artery images using a 5-point method.Results There was a statistically significant difference between the two groups in CNR and SNR(P<0.05).the SD value of the aorta,CT value of the left anterior descending coronary artery,and CT value of the left circumflex coronary artery between STD and MCR were not statistically significant(P>0.05);but the CT value of the right coronary artery was 346.46±60.17 in STD and 363.54±54.40 in MCR(P<0.05).There was a statistically significant difference between STD and MCR in image noise and subjective scoring of coronary artery segments(P<0.05).Conclusion MCR algorithm can effectively reduce motion artifacts without additional scanning,improve image quality,and increase the success rate of coronary artery CT angiography.
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