Experimental pulmonary emboli detected using magnetic resonance

G. Gamsu, M. Hirji, Elizabeth H Moore, W. R. Webb, A. Brito

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Experimental pulmonary emboli that were labelled with non-magnetic barium threads and produced using aminocaproic acid were introduced into the internal jugular veins of 5 dogs. Transverse axial magnetic resonance (MR) images (0.35 T, 15 MHz) and CT scans (2.0 or 4.8 seconds, G.E. 9800 or 8800 scanner) were obtained from the lung apex to base in each animal. The MR images were gated to the cardiac cycle, and spin echo techniques were used (TR = gated to the cardiac cycle; TE = 28 and 56 msec). Nineteen sites of embolism were determined from the CT scans. Two observers, who had no knowledge of the number or position of the emboli, individually assessed the MR images and marked the sites of emboli on clear acetate overlays. Each observer detected 12 of 19 emboli (63%) and each had 1 false positive result. Of the 19 emboli, 6 were central or parahilar and 13 were in the outer two thirds of the lungs. Three (first observer) or 4 (second observer) of the 7 false negative results were central. In retrospect, 2 central emboli were mistaken for hilar fat. One peripheral embolus was not visible, even in retrospect. The potential for MR to demonstrate relatively small pulmonary emboli has been shown. Clinical trials in patients seem warranted.

Original languageEnglish (US)
Pages (from-to)467-470
Number of pages4
JournalRadiology
Volume153
Issue number2
StatePublished - 1984
Externally publishedYes

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Embolism
Magnetic Resonance Spectroscopy
Lung
Aminocaproic Acid
Jugular Veins
Barium
Acetates
Fats
Clinical Trials
Dogs

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

Cite this

Gamsu, G., Hirji, M., Moore, E. H., Webb, W. R., & Brito, A. (1984). Experimental pulmonary emboli detected using magnetic resonance. Radiology, 153(2), 467-470.

Experimental pulmonary emboli detected using magnetic resonance. / Gamsu, G.; Hirji, M.; Moore, Elizabeth H; Webb, W. R.; Brito, A.

In: Radiology, Vol. 153, No. 2, 1984, p. 467-470.

Research output: Contribution to journalArticle

Gamsu, G, Hirji, M, Moore, EH, Webb, WR & Brito, A 1984, 'Experimental pulmonary emboli detected using magnetic resonance', Radiology, vol. 153, no. 2, pp. 467-470.
Gamsu G, Hirji M, Moore EH, Webb WR, Brito A. Experimental pulmonary emboli detected using magnetic resonance. Radiology. 1984;153(2):467-470.
Gamsu, G. ; Hirji, M. ; Moore, Elizabeth H ; Webb, W. R. ; Brito, A. / Experimental pulmonary emboli detected using magnetic resonance. In: Radiology. 1984 ; Vol. 153, No. 2. pp. 467-470.
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