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Comparison of low-dose sequences of dual-source ct and echocardiography for preoperative evaluation of aortic valve disease

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Chinese Medical Journal 2013年第23期126卷 4423-4429页

作者： FENG Juan WANG Xi-ming JI Xiao-peng LI Hai-ou LI Qiao GUO Wen-bin WANG Zheng-jun Department of Ultrasound Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 China Department of Cardiovascular Surgery Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 China Shandong Provincial Key Laboratory of Diagnosis and Treatment of Cardio-cerebral Vascular Diseases Shandong Medical Imaging Research Institute Jinan Shandong 250021 China

Background Accurate evaluation of coronary artery,aortic valve annulus diameter （AVAD）,and cardiac function in patients with aortic valve disease is of great significance for surgical *** this study,we explored the preoperative evaluation of low-dose sequence （MinDose sequence） scan of dual-source ct （DSct） for those *** Forty patients suspected for aortic valve disease （the experimental group） underwent MinDose sequence of DSct to observe coronary artery,AVAD,and left ventricular ejection fraction （LVEF）.Another 33 subjects suspected for coronary artery disease （the control group） underwent conventional retrospective electrocardiographically-gated sequence of ***-dimensional transthoracic echocardiography （2D-TTE） and four-dimensional transthoracic echocardiography （4D-TTE） were applied in the experimental group to measure AVAD and LVEF and compared with *** There was a strong correlation between LVEFs measured by 2D-TTE and MinDose-DSct （r=0.87,P ＜0.01）,as well as between 4D-TTE and MinDose-DSct （r=0.90,P ＜0.01）.AVAD measured by MinDose-DSct was in good agreement with corresponding measurements by 2D-TTE （r=0.90,P ＜0.01）.The effective dose in the experimental group was 63.54％ lower than that in the control *** MinDose sequence of DSct with a low radiation dose serving as a one-stop preoperative evaluation makes effective assessment of the coronary artery,AVAD,and LVEF for patients with aortic valve disease.

关键词： radiation dose coronary ct angiography dual-source ct cardiac function aortic valve annulus diameters

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心房颤动患者的低剂量、大螺距双源ct冠状动脉成像的可行性研究(英文)

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中华临床医师杂志（电子版） 2011年第20期5卷 6027-6032页

作者：孙凯韩瑞娟马利军王利军李立刚陈九宏 Department of Radiology Baotou Central Hospital Baotou Central Hospital Department of Cardiology Baotou Central Hospital ct BM Clinic Marketing Siemens Healthcare

Objective The objective was to attempt to rule out whether high-pitch spiral acquisition dual-source computed tomography coronary angiography(ctCA)can be performed in patients with atrial fibrillation at low *** Ten patients with atrial fibrillation who were admitted for a first diagnostic coronary angiogram were screened for *** patients underwent dual-source *** were performed ctCA using the prospectively ECG-gated high-pitch mode and retrospective ECG gating spiral acquisition respectively with their *** start phase for image acquisition of the most cranial slice was selected at 20%-30% of the R-R interval in all *** Image qualities of prospectively ECG-gated high-pitch mode were rated as being excellent in 7 cases of all the patients and only 3 cases′ image qualities were graded score *** using retrospective ECG gating spiral acquisition mode,non-diagnostic image quality (score 3) occurred in 4 patients which were observed in RCA and 1 patient in *** estimated radiation dose ranges from 0.68 to 1.887 mSv in flash mode and the radiation dose of spiral mode were very high ranging from 14.92 to 29.308 *** Our case series suggest that patients with atrial fibrillation rhythm can be performed ctCA with high-pitch spiral acquisition mode.20%-30% of the RR interval window for data acquisition for high-pitch dual-source ctCA may probably obtain good image quality with low doses.

关键词： Coronary angiography Atrial fibrillation dual-source ct High pitch

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