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Sichuan Da Xue Xue Bao Yi Xue Ban. 2008 Mar;39（2）:305-8. [Influence of cardiac rhythm on image quality of 64-slice multidetector-row CT coronary angiography and clinic value of post-processing technology with image]. [Article in Chinese] Li ZL1, Guo YK, Hu G, Ma ES, Yuan Y. Author information 1Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China.
Abstract OBJECTIVE: To evaluate the influence of cardiac rhythm on 64-slice multi-detector row CT coronary angiography and clinic value of imaged post-processing technology. METHODS: 687 patients with suspected coronary heart disease who underwent 64-slice multi-detector row CT coronary angiography were retrospectively analyzed with their CT images. Four group images of patients were analyzed and compared according to the fluctuation of cardiac rhythm. Multi-phase reconstruction （n = 76） and the ECG-edit software （n = 21） were performed in those patients with arrhythmia. RESULTS: The statistical differences were found among the imaging quality of each group （chi2 = 225.040, P < 0.001）. As the fluctuation of cardiac rhythm increased, the quality of CT images dropped down concomitantly. After images processed with ECG-edit software, the quality of CT coronary angiography images got improved （Z = - 3.385, P = 0.001）. In 76 patients with multi-phase reconstruction, the image quality of right coronary artery got improved in 40% R-R interval when high quality images couldn't be obtained in 75% R-R interval （Z = - 4.209, P < 0.001）. CONCLUSION: Cardiac rhythm is an important factor to affect the CT coronary angiography, but post-processing technology may be useful for improving the imaging quality. PMID: 18630710
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