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Published online before print October 25, 2006, 10.1148/radiol.2413051571
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Abdominal Aortic Aneurysm: Can the Arterial Phase at CT Evaluation after Endovascular Repair Be Eliminated to Reduce Radiation Dose?1

Michael Macari, MD, Hersh Chandarana, MD, Bernhardt Schmidt, PhD, Julie Lee, MD, Patrick Lamparello, MD and James Babb, PhD

1 From the Departments of Radiology (M.M., H.C., J.L., J.B.) and Vascular Surgery (P.L.), New York University School of Medicine, Suite HW 211, 560 First Ave, New York, NY 10016; and Siemens Medical Solutions, Malvern, Pa (B.S.). Received September 20, 2005; revision requested November 18; revision received December 20; accepted January 20, 2006; final version accepted March 1. Address correspondence to M.M. (e-mail: michael.macari{at}med.nyu.edu).


Figure 1
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  		Figure 1a: Type II endoleak seen on arterial and venous phase CT images in 70-year-old man. (a) Transverse nonenhanced image shows no abnormality (arrow) ventral to the graft within the aneurysm sac. (b, c) Transverse arterial phase (b) and venous phase (c) images show small blush of contrast material (arrow) ventral to the graft within the aneurysm sac. The endoleak arising from the inferior mesenteric artery is seen with similar conspicuity on the arterial and venous phase images.

 

Figure 1
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  		Figure 1b: Type II endoleak seen on arterial and venous phase CT images in 70-year-old man. (a) Transverse nonenhanced image shows no abnormality (arrow) ventral to the graft within the aneurysm sac. (b, c) Transverse arterial phase (b) and venous phase (c) images show small blush of contrast material (arrow) ventral to the graft within the aneurysm sac. The endoleak arising from the inferior mesenteric artery is seen with similar conspicuity on the arterial and venous phase images.

 

Figure 1
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  		Figure 1c: Type II endoleak seen on arterial and venous phase CT images in 70-year-old man. (a) Transverse nonenhanced image shows no abnormality (arrow) ventral to the graft within the aneurysm sac. (b, c) Transverse arterial phase (b) and venous phase (c) images show small blush of contrast material (arrow) ventral to the graft within the aneurysm sac. The endoleak arising from the inferior mesenteric artery is seen with similar conspicuity on the arterial and venous phase images.

 

Figure 2
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  		Figure 2a: Type II endoleak seen only during venous phase in 68-year-old man. (a) Transverse arterial phase CT image shows no evidence of endoleak. (b) Transverse venous phase CT image shows small blush of contrast material (arrow) to the left of the graft. The blush can be traced from a back-bleeding lumbar artery.

 

Figure 2
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  		Figure 2b: Type II endoleak seen only during venous phase in 68-year-old man. (a) Transverse arterial phase CT image shows no evidence of endoleak. (b) Transverse venous phase CT image shows small blush of contrast material (arrow) to the left of the graft. The blush can be traced from a back-bleeding lumbar artery.

 

Figure 3
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  		Figure 3a: Type II endoleak seen only during venous phase in 72-year-old man. (a) Transverse arterial phase CT image shows no evidence of endoleak. (b) Transverse venous phase CT image shows multiple foci of enhancement (arrow) to the right of the graft. The foci can be traced from a back-bleeding lumbar artery.

 

Figure 3
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  		Figure 3b: Type II endoleak seen only during venous phase in 72-year-old man. (a) Transverse arterial phase CT image shows no evidence of endoleak. (b) Transverse venous phase CT image shows multiple foci of enhancement (arrow) to the right of the graft. The foci can be traced from a back-bleeding lumbar artery.

 




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