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MR‐guided balloon angioplasty of stenosed aorta: In vivo evaluation using near‐standard instruments and a passive tracking technique
Author(s) -
Godart François,
Beregi JeanPaul,
Nicol Lionel,
Occelli Bruno,
Vincentelli André,
Daanen Vincent,
Rey Christian,
Rousseau Jean
Publication year - 2000
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/1522-2586(200010)12:4<639::aid-jmri18>3.0.co;2-w
Subject(s) - balloon , angioplasty , medicine , abdominal aorta , radiology , stenosis , aorta , stent , imaging phantom , magnetic resonance angiography , biomedical engineering , magnetic resonance imaging , surgery
The purpose of this study was to assess the feasibility of magnetic resonance (MR)‐guided balloon angioplasty of a stenosed aorta on an open low‐field magnet using a passive tracking technique. Visualization of vessels and position of instruments were realized by using a fast low‐angle shot (FLASH) sequence. Catheters and guidewire were prepared for susceptibility‐based MR visualization. Standard balloon catheters were inflated with diluted gadolinium, and nitinol guidewires were modified by incorporation of iron oxide markers into their walls. After validation on a flow phantom, balloon angioplasty was performed on an in vivo model of arterial stenosis. Creation of abdominal aorta stenosis was realized in five piglets. MR‐guided balloon angioplasty of the aorta was performed with success in all but one. In one of them, stent implantation was achieved in the descending aorta. Balloon angioplasty using a passive tracking technique is a simple concept that can be realized with near‐standard instruments and any MR imaging system. This represents an advance toward MR‐guided vascular interventions in the future. J. Magn. Reson. Imaging 2000;12:639–644. © 2000 Wiley‐Liss, Inc.