“…In addition, a method for visualizing coronary venous anatomy on noncontrast CT has been reported. 8 The method uses the epicardial fat surrounding the vessels to create tissue contrast and render the vessel outlines clearly visible; using standard 3D workstations, the image data are inverted, and the window level and width are set to approximately −300 and 600 Hounsfield units, respectively. Using appropriate CT value extraction, 74% of the coronary venous branches relevant to CRT could be identified by CT without intravenous contrast, 8 and in PLSVC cases, the dilated CS trunk is dilated and thus easier to visualize.…”