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Three-Dimensional Contrast-Enhanced MR Angiography of Endovascular Covered Stents in Patients with Peripheral Arterial Occlusive Disease

Kai Uwe Juergens1, Bernd Tombach, Peter Reimer, Thomas Vestring and Walter Heindel

1 All authors: Department of Clinical Radiology, University of Muenster, Albert-Schweitzer-Str. 33, D-48129 Muenster, Germany.



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  		Fig. 1. —Photograph of inflated Hemobahn device (length, 8 cm; width, 10 mm; Gore & Associates, Putzbrunn, Germany). Device consists of self-expanding polytetrafluoroethylene graft with external support.

 


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  		Fig. 2A. —Phantom experiments. Photograph shows two inflated Hemobahn devices (length, 5 cm; Gore & Associates, Putzbrunn, Germany) serving as model for femoral artery (labeled diameter, 6 mm) and common iliac artery (labeled diameter, 10 mm) were embedded into commercially available candle-gel.

 


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  		Fig. 2B. —Phantom experiments. Three-dimensional contrast-enhanced MR angiogram shows stent-related signal void displaying 10-mm Hemobahn as dark ring in axial image orientation (arrowheads).

 


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  		Fig. 3A. —Phantom experiments. Three-dimensional MR angiogram shows Hemobahn devices (Gore & Associates, Putzbrunn, Germany) filled with different dilutions (1:320, 1:160, 1:80, 1:40, 1:20) of gadopentetate dimeglumine compared with saline-filled devices (NaCl).

 


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  		Fig. 3B. —Phantom experiments. Graph shows endoluminal signal intensity obtained in contrast-enhanced graft ({diamondsuit}) and in saline-filled phantom ({blacksquare}) by three-dimensional MR angiography.

 


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  		Fig. 4A. —48-year-old man with extended stenosis in distal common femoral and popliteal artery. Digital subtraction angiogram obtained before interventional treatment shows stenotic lesion (arrow).

 


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  		Fig. 4B. —48-year-old man with extended stenosis in distal common femoral and popliteal artery. Digital subtraction angiogram obtained after implantation of two Hemobahn devices (arrows) (diameter of both devices, 6 mm; length of first device, 5 cm; length of second device, 10 cm; Gore & Associates, Putzbrunn, Germany).

 


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  		Fig. 4C. —48-year-old man with extended stenosis in distal common femoral and popliteal artery. Postinterventional maximal intensity projection of three-dimensional contrast-enhanced MR angiography shows proximal and distal ends (arrows) of devices.

 

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