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Radiology. 1992 Jun;183(3):667-72. doi: 10.1148/radiology.183.3.1584916.

Contrast-enhanced MR imaging of the lung: assessments of ventilation and perfusion.

Radiology

Y Berthezène, V Vexler, O Clément, A Mühler, M E Moseley, R C Brasch

Affiliations

  1. Department of Radiology, University of California, San Francisco 94143-0628.

PMID: 1584916 DOI: 10.1148/radiology.183.3.1584916

Abstract

The use of aerosolized gadopentetate dimeglumine to define regional lung ventilation and of intravenously administered polylysine-(gadopentetate dimeglumine)40 to assess regional lung perfusion was investigated. In 10 healthy rats who breathed aerosolized gadopentetate dimeglumine (0.25 mol/L) for 5 minutes, pulmonary signal intensity increased diffusely in both lungs by more than 70%. When the same animals received intravenously administered polylysine-(gadopentetate dimeglumine)40 (0.1 mmol of gadolinium per kilogram), there was an additional 300% enhancement of the pulmonary parenchyma. In a rat model of acute unilateral pulmonary embolism (n = 5), perfusion defects were identified after administration of polylysine-(gadopentetate dimeglumine)40, but no ventilation abnormality was seen after inhalation of gadopentetate dimeglumine. In a rat model of acute unilateral airway obstruction (n = 5), only the ventilated right lung enhanced after inhalation of gadopentetate dimeglumine. In four of these animals, the focal ventilation defect was accompanied by a matched decrease in perfusion, seen after enhancement of the blood pool with polylysine-(gadopentetate dimeglumine)40.

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