Kr-81m ventilation imaging: Clinical utility in suspected pulmonary embolism

J. M. Rosen, D. R. Biello, B. A. Siegel, D. W. Seldin, P. O. Alderson

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The results of Kr-81m/Tc-99m ventilation-perfusion (VP) lung scintigraphy were correlated with the results of pulmonary angiography for 74 patients suspected of having pulmonary embolism (PE). Among patients having a diagnostic scan, the sensitivity and specificity of scintigraphy were 91% and 94%, respectively. Also, 157 consecutive cases of Kr-81m/Tc-99m VP lung scintigraphy were reviewed, and the frequency of an indeterminate scan was found to be 22%. A similar frequency was found for VP scintigraphy with xenon-133. Of eight patients who had indeterminate scans due to the presence of a single VP mismatch, four were demonstrated to have PE by angiography. Kr-81m is an excellent agent for VP scanning in cases of suspected PE, offering accuracy in diagnosis as well as favorable physical properties.

Original languageEnglish
Pages (from-to)787-790
Number of pages4
Issue number3
StatePublished - Jan 1 1985


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