Synapse vincent ver 5

CT-derived LA volume and LV mass were analyzed using a dedicated workstation (Synapse Vincent ver. 5; Fujifilm Medical Systems, Tokyo, Japan). We analyzed LA volume in all phases of the cardiac cycle using a three-dimensional image of the LA created by volume rendering, excluding the LA appendage and PVs, and LA maximum volume was measured. The CT-derived LA volume index (LAVI) was calculated by dividing the LA maximum volume by the body surface area (BSA). LV mass was analyzed at a phase in LV end-diastole (RR 0%). LV mass index (LVMI) was calculated by dividing LV mass by BSA.

The timing bolus scan and dynamic CTP scan data sets were transferred to a dedicated software (Synapse Vincent ver.5; Fujifilm Medical Systems, Tokyo, Japan). A radiological technologist (9 years of experience in cardiac imaging) independently set the regions of interest (ROI) within the ascending aorta and measured aortic peak enhancement (PE) for each timing bolus scan and dynamic CTP scan data.