Six Cases of Acute Central Pulmonary Embolism Revealed on Unenhanced Multidetector CT of the Chest
Jeffrey P. Kanne1,
Michael B. Gotway2,
Nisa Thoongsuwan3 and
Eric J. Stern3
1 Department of Radiology, University of Washington Medical Center, University
of Washington School of Medicine, 1959 N.E. Pacific St., Box 357115, Seattle,
WA 98195-7115.
2 Department of Radiology, Thoracic Imaging Section, San Francisco General
Hospital, University of California, San Francisco, 1001 Potrero Ave., Rm. 1X
55A, Box 1325, San Francisco, CA 94110.
3 Department of Radiology, Harborview Medical Center, University of Washington
School of Medicine, 325 Ninth Ave, Box 359728, Seattle, WA 98104-2499.

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Fig. 1A. 67-year-old man with syncopal episode 1 month after
hemicolectomy for colon adenocarcinoma. Unenhanced multidetector CT (MDCT)
scan shows bilateral central high-attenuation emboli (arrows).
Average CT attenuation is 70 H.
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Fig. 1B. 67-year-old man with syncopal episode 1 month after
hemicolectomy for colon adenocarcinoma. Enhanced MDCT scan also shows central
pulmonary emboli.
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Fig. 2A. 63-year-old man with diabetes, congestive heart failure, and
recent immobilization. Unenhanced multidetector CT (MDCT) scan shows
high-attenuation emboli in right main pulmonary artery (asterisk).
Average CT attenuation is 77 H.
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Fig. 2B. 63-year-old man with diabetes, congestive heart failure, and
recent immobilization. Enhanced MDCT scan also shows central pulmonary
embolus.
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Fig. 3A. 52-year-old man 3 days after placement of
ventriculoperitoneal shunt. Unenhanced multidetector CT (MDCT) scan shows
high-attenuation "saddle" embolus (arrow).
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Fig. 3B. 52-year-old man 3 days after placement of
ventriculoperitoneal shunt. Enhanced MDCT scan also shows saddle pulmonary
embolus.
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Fig. 4A. 65-year-old woman with Stanford type A aortic dissection.
Unenhanced multidetector CT (MDCT) scan shows bilateral high-attenuation
central pulmonary emboli (white arrows) and aortic intimal flap
(black arrow).
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Fig. 4B. 65-year-old woman with Stanford type A aortic dissection.
Enhanced MDCT scan shows central pulmonary emboli and aortic intimal flap.
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Copyright © 2003 by the American Roentgen Ray Society.