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- W2370415935 abstract "Objective:To evaluate the enhancing effects of two protocols in 16-detector row CT pulmonary venography of patients with atrial fibrillation prior to radio-frequency catheter ablation(RFCA).Methods:61 patients underwent 16 detector row CT pulmonary venography before RFCA,which were randomly assigned to group A(n=35)or group B(n=26).Both groups were all given 300mgI/ml contrast agent.Bolus tracking was used with the monitoring location at middle left atrium and threshold 100HU,the contrast was injected at rate 4ml/s with total amount 60ml in group A.Fixed delay time was used with total amount 90ml,injection rate 3ml/s,delay time 25s or 28s(20 patients 25s,6 patients 28s)in group B.Other scanning parameters were the same in both groups.After scanning,all raw data were reconstructed into images with effective thickness 1mm and interval 0.5mm,and all images were transferred into the workstation.All patients were determined whether they have variations in pulmonary venous drainage by VR and MIP images,and CT values of ROI located at bihilar pulmonary arteries,left superior and right inferior pulmonary veins in ostium and middle left atrium were measured on 1mm images.A comparison of the average CT values and the difference between pulmonary veins and arteries between two groups was made.Statistic analysis was carried out with the software of SPSS.Results:The average CT value of pulmonary arteries of group A was lower than that of group B.The average CT values of pulmonary veins and left atrium of group A were higher than those of group B.Conclusion:Compared to fixed delay time,bolus tracking protocol could selectively enhance pulmonary veins and left atrium in atrial fibrillation patients who underwent 16 detector row CT pulmonary venography before RFCA,being more beneficial for volume imaging reconstruction." @default.
- W2370415935 created "2016-06-24" @default.
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- W2370415935 date "2007-01-01" @default.
- W2370415935 modified "2023-09-23" @default.
- W2370415935 title "16-detector Row CT Pulmonary Venography of Atrial Fibrillation Patients Prior to RFCA:a Study on the Effects of Two Contrast Enhancement Protocols" @default.
- W2370415935 hasPublicationYear "2007" @default.
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