Fig. 2.

Epicardial fat volume measurement using threshold-based 3-dimensional (3D) segmentation as the new method. A: the initial 3D volumetric data obtained not only intrathoracic fat, but also extrathoracic fat tissue (CT attenuation range between -200 HU and -30 HU). B: for the accurate measurement of the epicardial fat volume, we compared it to the corresponding 2-dimensional axial image. C: surface shaded display image demonstrates 3D epicardial fat volume (gray color). HU: Hounsfield unit.