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Thin-Section Multidetector CT Angiography of Renal Artery Stents

Jeffrey V. Behar1, Rendon C. Nelson1, James P. Zidar2, David M. DeLong1 and Tony P. Smith1

1 Department of Radiology, Duke University Medical Center, Box 3808, Rm. 1532, Erwin Rd., Durham, NC 27710.
2 Department of Medicine, Duke University Medical Center, Durham, NC 27710.



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  		Fig. 1A. —57-year-old man with hypertension and right renal artery stenosis. Patient underwent angioplasty with stent placement for treatment of hypertension. Catheter angiogram shows patent stent lumen (arrows) immediately after placement.

 


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  		Fig. 2A. —69-year-old man with pseudoaneurysm formation after stent placement in left renal artery to treat hypertension. Catheter angiogram shows pseudoaneurysm (arrow) near origin of stent. Lines on renal artery are from program for quantitative analysis that was used to measure stent diameters after placement.

 


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  		Fig. 2B. —69-year-old man with pseudoaneurysm formation after stent placement in left renal artery to treat hypertension. Direct axial CT scan reveals extraluminal contrast material at proximal aspect of stent consistent with pseudoaneurysm (arrow) seen on catheter angiogram in A.

 


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  		Fig. 2C. —69-year-old man with pseudoaneurysm formation after stent placement in left renal artery to treat hypertension. Curved axial multiplanar reformatted CT scan shows both renal arteries, left renal stent, and pseudoaneurysm (arrow).

 


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  		Fig. 1B. —57-year-old man with hypertension and right renal artery stenosis. Patient underwent angioplasty with stent placement for treatment of hypertension. Coronal multiplanar reformatted CT scan shows stent patency and position (arrows) in ostium of renal artery.

 


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  		Fig. 1C. —57-year-old man with hypertension and right renal artery stenosis. Patient underwent angioplasty with stent placement for treatment of hypertension. Stent patency and position (arrows) in renal artery confirmed by curved axial multiplanar reformatted CT scan.

 


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  		Fig. 3A. —83-year-old man with hypertension who underwent right renal artery stent placement 9 months earlier. Selective catheter angiogram of right renal artery shows intrastent stenosis. Metallic stent (arrows) and contrast material in lumen are visualized.

 


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  		Fig. 3B. —83-year-old man with hypertension who underwent right renal artery stent placement 9 months earlier. Coronal multiplanar reformatted CT scan shows intrastent stenosis (arrow) that correlates with catheter angiogram in A.

 


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  		Fig. 3C. —83-year-old man with hypertension who underwent right renal artery stent placement 9 months earlier. Axial curved multiplanar reformatted CT scan provides additional image of intrastent stenosis (arrow).

 


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  		Fig. 4A. —63-year-old man with hypertension and left renal artery stent placement. Catheter angiogram of final stent placement shows well-perfused branch artery (arrow) covered by stent.

 


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  		Fig. 4B. —63-year-old man with hypertension and left renal artery stent placement. Three-dimensional lighted volume-rendered CT projection image shows truncal location of stent and well-perfused branch artery (arrow) arising within stent.

 

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