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A multispectral three-dimensional acquisition technique for imaging near metal implants

✍ Scribed by Kevin M. Koch; John E. Lorbiecki; R. Scott Hinks; Kevin F. King

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
635 KB
Volume
61
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Metallic implants used in bone and joint arthroplasty induce severe spatial perturbations to the B~0~ magnetic field used for high‐field clinical magnetic resonance. These perturbations distort slice‐selection and frequency encoding processes applied in conventional two‐dimensional MRI techniques and hinder the diagnosis of complications from arthroplasty. Here, a method is presented whereby multiple three‐dimensional fast‐spin‐echo images are collected using discrete offsets in RF transmission and reception frequency. It is demonstrated that this multi acquisition variable‐resonance image combination technique can be used to generate a composite image that is devoid of slice‐plane distortion and possesses greatly reduced distortions in the readout direction, even in the immediate vicinity of metallic implants. Magn Reson Med 61:381–390, 2009. © 2009 Wiley‐Liss, Inc.

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