Title: Correlation between Image Quqlity and Heart Rate in Coronary Angiography:Automatic Best Phase Selection Technique with Dual Source CT
Abstract: Objective To assess image quality of coronary arteries reconstructed at the automatic selected best diastolic and systolic phase and to assess the effect of heart rate on image quality.Materials and Methods 107 patients underwent Dual-source CT coronary angiography.The raw data of coronary arteries were automatic reconstructed at the best systolic and diastolic phase..Image quality was evaluated using four-score system.Coronary arteries were segmented according to the guideline of American Heart Association.All patients were divided into six groups according to their heart rate.Image quality of coronary arteries was evaluated for different groups.Results 1297 segments of coronary arteries were analyzed in 107 patients.For best systolic and diastolic phase,1217(93.8%) and 1093(84.3%) segments had assessable image quality,80 segments(6.2%) had non assessable image quality.Image quality of coronary arteries at the best systolic phase had no correlation with heart rate;however,image quality of coronary arteries at the best diastolic phase had negative correlation with heart rate.Image quality of coronary arteries was degraded or even nonassessable for the patient with heart rate higher than 80 beat per minute(bpm).Conclusion Assessable images of coronary arteries were obtained using automatic best phase selection,which can satisfy clinical demands.Image quality of coronary arteries at the best diastolic phase had negative correlation with heart rate.Best systolic phase data should be used for the patient with heart rate higher than 80 bpm.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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