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(Circulation. 1971;43:165.)
© 1971 American Heart Association, Inc.

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Radiologic Notes in Cardiology

Use of the Contrast Interface in Angiocardiography

MURRAY G. BARON M.D.¹

¹ From the Department of Radiology of The Mount Sinai Hospital and Mount Sinai School of Medicine, New York, New York.

The presence of a contrast interface indicates a difference in density between shadows of adjacent structures while the absence of an interface means that their radiodensities are similar. This is of considerable help in evaluating the presence or absence of opacified blood in any portion of the heart or great vessels on an angiocardiogram.