Development of a 0.014-inch magnetic resonance imaging guidewire.
نویسندگان
چکیده
The purpose of this study was to develop a standard 0.014-inch intravascular magnetic resonance imaging guidewire (MRIG), a coaxial cable with an extension of the inner conductor, specifically designed for use in the small vessels. After a theoretical analysis, the 0.014-inch MRIG was built by plating/cladding highly electrically conductive materials, silver or gold, over the inside and outside of the coaxial conductors. The conductors were made of superelastic, nonmagnetic, biocompatible materials, Nitinol or MP35N. Then, in comparison with a previously designed 0.032-inch MRIG, the performance of the new 0.014-inch MRIG in vitro and in vivo was successfully evaluated. This study represents the initial work to confirm the critical role of highly conductive and superelastic materials in building such small-size MRIGs, which are expected to generate high-resolution MR imaging of vessel walls/plaques and guide endovascular interventional procedures in the small vessels, such as the coronary arteries.
منابع مشابه
Development of an 0.014-in Magnetic Resonance Imaging-guidewire
0.032-in MRIG (Right column), and the newly-designed 0.014-in MRIG (Left columna). A: The scheme of the two MRIGs. B: Photographies of the two MRIGs. C: The SNR maps of two MRIGs; D&E: The segittal and axial protonweighed images of the balloon-inflated target vessel walls with the 0.032-in MRIG and 0.014 MRIG, respectively. 0.032-in MRIG New 0.014-in MRIG DEVELOPMENT OF AN 0.014-IN MAGNETIC RES...
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عنوان ژورنال:
- Magnetic resonance in medicine
دوره 53 4 شماره
صفحات -
تاریخ انتشار 2005