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Whole heart and pericardium
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Feng et al:
Superiorly: Start just inferior to the left
pulmonary artery, include the great vessels in a
rounded contour
Inferiorly: Heart blends with the diaphragm.
Cardiac vessels are in the fatty tissue within the
pericardium, so should be included in the
contours, even if there is no heart muscle visible.
If contrast is present, the SVC can be contoured
separately from the whole heart. If not possible,
include in whole heart contour