Suspected pulmonary embolism: Prospective evaluation with pulmonary MR angiography

Mark L. Schiebler, George A. Holland, Hiroto Hatabu, John Listerud, Thomas Foo, Harold Palevsky, Henry Edmunds, Warren B. Gefter

Research output: Contribution to journalArticlepeer-review

Abstract

PURPOSE: To prospectively evaluate three magnetic resonance (MR) imaging techniques for detection of pulmonary embolism. MATERIALS AND METHODS: Eighteen patients in whom the presence of acute or chronic pulmonary emboli was suspected underwent examination with the following pulse sequences: cardiac-gated spin echo, cine spatial modulation of magnetization, and two-dimensional time-of-flight pulmonary breath-hold (PBH) MR angiography. Three radiologists independently and blindly reviewed each case and graded a total of 518 arterial segments for each pulse sequence with a continuous scale of 0%-100% for likelihood of pulmonary embolism. RESULTS: The overall sensitivity of PBH MR angiography for detection of acute pulmonary emboli was 0.85; for chronic emboli, which were smaller in anteroposterior (AP) diameter, the overall sensitivity was 0.42. Emboli larger than 1 cm in AP diameter were typically identified with >75% confidence with all pulse sequences. CONCLUSION: Acute pulmonary emboli greater than 1 cm in AP diameter were as accurately identified on PBH MR angiograms obtained in 15 seconds as they were on MR images obtained with longer pulse sequences not dependent on breath holding.

Original languageEnglish (US)
Pages (from-to)125-131
Number of pages7
JournalRadiology
Volume189
Issue number1
StatePublished - Oct 1993
Externally publishedYes

Keywords

  • Embolism, pulmonary, 60.72, 944.77
  • Magnetic resonance (MR), comparative studies
  • Magnetic resonance (MR), vascular studies, 564.121411, 564.121416, 564.12142
  • Pulmonary arteries, stenosis or obstruction, 564.72, 564.775, 564.813

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

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