Image post-processing and measurement
WL
The best phase images were chosen and uploaded to a GE AW4.6 workstation. Next, two-dimensional (2D) and three-dimensional (3D) reconstruction images were generated through the Cardica CTA Analysis software. The proximal LM, LAD, and LCX plaques were observed from the 2D images. On the multi-plane maximum intensity projection (MIP) (MIP = 4 mm, window level (WL) = 40HU, window width (WW) = 400HU), the image was adjusted to display the maximum cross-sectional area of the oblique coronal plane of the proximal vessels of the LAD and LCX. An angle tool was used to measure the left trunk bifurcation angle (∠LAD–LCX). During the measurement, the intersection angle of the central axes of the LAD and LCX lumens on the saved image served as the intersection angle(∠LAD-LCX, Fig. 
Measurement of ∠LAD-LCX angle (