Multidetector CT Angiography of the Aortoiliac System and Lower Extremities: A Prospective Comparison with Digital Subtraction Angiography
Michael L. Martin1,
Kiang H. Tay1,
Borys Flak1,
Peter D. Fry2,
D. Lynn Doyle2,
David C. Taylor2,
York N. Hsiang2 and
Lindsay S. Machan1
1 Department of Radiology, University of British Columbia, UBC Hospital Site,
2211 Wesbrook Mall, Vancouver, B. C., V6T 2B5, Canada.
2 Department of Vascular Surgery, University of British Columbia, Vancouver, B.
C., V6T 2B5, Canada.

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Fig. 1A. Significant external iliac artery stenosis underestimated by
multide-tector CT (MDCT) angiography in 59year-old man with rest claudication.
Maximum-intensity-projection MDCT angiogram of iliac arteries obtained after
manual bone subtraction shows left external iliac artery stenosis
(arrow) that was rated as 2550% by all three observers.
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Fig. 1B. Significant external iliac artery stenosis underestimated by
multide-tector CT (MDCT) angiography in 59year-old man with rest claudication.
Left anterior oblique digital subtraction angiogram (DSA) of pelvis shows
shelflike plaque in mid external iliac artery (arrow), rated as
7599% stenosis by all three observers. Stenting of left common iliac
artery and angioplasty of left external iliac artery were performed at time of
DSA.
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Fig. 2A. Patent left leg runoff seen on multidetector CT (MDCT)
angiography but not on digital subtraction angiography (DSA) in 74-year-old
man with severe short-distance claudication. Posteroanterior DSA image
obtained from right brachial approach of abdominal aorta shows severe
irregularity of aorta.
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Fig. 2B. Patent left leg runoff seen on multidetector CT (MDCT)
angiography but not on digital subtraction angiography (DSA) in 74-year-old
man with severe short-distance claudication. Posteroanterior DSA image of
iliac vessels shows severe right common iliac artery stenosis
(arrow), irregularity of right iliac system, and occlusion of left
common iliac artery with no collateral filling of left external iliac or
common femoral artery.
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Fig. 2C. Patent left leg runoff seen on multidetector CT (MDCT)
angiography but not on digital subtraction angiography (DSA) in 74-year-old
man with severe short-distance claudication. Subtracted DSA image of proximal
left thigh after distal aortic contrast injection shows no opacification of
thigh vasculature.
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Fig. 2D. Patent left leg runoff seen on multidetector CT (MDCT)
angiography but not on digital subtraction angiography (DSA) in 74-year-old
man with severe short-distance claudication. Frontal
maximum-intensity-projection MDCT angiogram of aortoiliac region obtained
after manual bone subtraction shows collateral filling of left common femoral
artery from inferior epigastric artery (curved arrow) and superficial
iliac circumflex artery (straight arrow).
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Fig. 2E. Patent left leg runoff seen on multidetector CT (MDCT)
angiography but not on digital subtraction angiography (DSA) in 74-year-old
man with severe short-distance claudication. Frontal
maximum-intensity-projection MDCT angiogram of left leg shows continuous
arterial runoff from groin to ankle supplied by posterior tibial artery.
Anterior tibial and peroneal arteries are occluded.
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Fig. 3A. Severe left common iliac artery stenosis in 46-year-old man
with microemboli to left foot. Right anterior oblique
maximum-intensity-projection multidetector CT (MDCT) angiogram obtained after
manual bone removal shows focal eccentric 95% stenosis of mid common iliac
artery (arrow).
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Fig. 3B. Severe left common iliac artery stenosis in 46-year-old man
with microemboli to left foot. Right anterior oblique digital subtraction
angiography image shows excellent concordance (arrow) with MDCT
angiogram (A).
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Copyright © 2003 by the American Roentgen Ray Society.