Figure 2.

Figure illustrating epicardial and pericardial fat quantification. (A) On an axial view the pericardial sac is easily identified as a thin band enveloping the heart. Epicardial fat is the fat contained between the pericardium and the heart. (B) Total thoracic fat (epicardial fat plus paracardial fat). (C) The pericardial sac is traced by an expert observer in 10-20 axial slices between the upper and lower borders of the heart. (D) Semi-automated software calculates all epicardial fat (pink overlay), separated from paracardial fat (red overlay).