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Radiology, Vol 176, 761-770, Copyright © 1990 by Radiological Society of North America

ARTICLES

Pulmonary vascular cine MR imaging: a noninvasive approach to dynamic imaging of the pulmonary circulation

WB Gefter, H Hatabu, BJ Dinsmore, L Axel, HI Palevsky, N Reichek, ML Schiebler and HY Kressel
Department of Radiology (David W. Devon Medical Imaging Center), Hospital of the University of Pennsylvania, Philadelphia 19104.

Cine gradient-recalled magnetic resonance (MR) imaging, which has flow sensitivity and high temporal resolution, may potentially yield both morphologic and dynamic flow-related information in the pulmonary vasculature. The authors used this modality to evaluate pulmonary vessels in 12 healthy subjects and in 14 patients with a variety of cardiopulmonary disorders. Normal pulmonary arteries and veins were characterized by distinctive signal intensity and diameter variations as well as motion of the vessels during the cardiac cycle. Patients with pulmonary arterial hypertension demonstrated loss of the normal pulsatile systolic increase and diastolic decline in velocity-related signal intensity and in diameter of the proximal pulmonary arteries. Disorders of pulmonary venous signal and diameter profiles during the cardiac cycle, which show a characteristic biphasic pattern in healthy subjects, were identified in five patients with mitral valvular disease. These initial results indicate that cine MR imaging techniques hold promise in the evaluation of pathophysiologic conditions in the pulmonary circulation.


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