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(Radiology. 2001;219:284-287.)
© RSNA, 2001

Technical Developments

A Precious Metal Alloy for Construction of MR Imaging-compatible Balloon-expandable Vascular Stents1

Lukas C. van Dijk, MD, Jacqueline van Holten, MD, Bastiaan P. van Dijk, BSc, Niels A. A. Matheijssen, PhD and Peter M. T. Pattynama, MD

1 From the Department of Radiology, Erasmus University Medical Center Rotterdam, "Dijkzigt," Dr Molewaterplein 40, 3015 GD Rotterdam, the Netherlands (L.C.v.D., J.v.H., N.A.A.M., P.M.T.P.), and Elephant Dental, Hoorn, the Netherlands (B.P.v.D.). Received March 7, 2000; revision requested April 26; revision received August 1; accepted September 6. Address correspondence to L.C.v.D. (e-mail: lcvandijk@rond.azr.nl).

The authors developed ABI alloy, which mechanically resembles stainless steel 316. The main elements of ABI alloy are palladium and silver. Magnetic resonance (MR) images and radiographs of ABI alloy and stainless steel 316 stent models and of nitinol, tantalum, and Elgiloy stents were compared. ABI alloy showed the least MR imaging artifacts and was more radiopaque than stainless steel 316. ABI alloy has the potential to replace stainless steel 316 for construction of balloon-expandable MR imaging–compatible stents.

Index terms: Magnetic resonance (MR), artifact, 9*.129412, 9*.129422 • Magnetic resonance (MR), vascular studies, 9*.129412, 9*.12942 • Stents and prostheses, 9*.1268




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