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Nerve root infiltration of the first sacral root with MRI guidance
Author(s) -
Ojala Risto,
Vahala Erkki,
Karppinen Jaro,
Klemola Rauli,
BlancoSequeiros Roberto,
Vaara Teuvo,
Tervonen Osmo
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<556::aid-jmri6>3.0.co;2-c
Subject(s) - medicine , nerve root , magnetic resonance imaging , failed back surgery , fluoroscopy , infiltration (hvac) , nuclear medicine , radiology , fast spin echo , materials science , spinal cord stimulation , psychiatry , spinal cord , composite material
The purpose of this clinical trial was to describe the methodology and evaluate the accuracy of optical tracking‐based magnetic resonance (MR)‐guided infiltration of the first sacral (S1) root. Thirty‐five infiltrations were performed on 34 patients with a 0.23‐T open C‐arm magnet installed in a fully equipped operation room with large‐screen (36 inches) display and optical navigator utilizing infrared passive tracking. T1 and T2 fast spin‐echo (FSE) images were used for localizing the target and fast field echo for monitoring the procedure. Saline as contrast agent in single‐shot (SS)FSE images gave sufficient contrast‐to‐noise ratio. Twenty‐four patients had unoperated L5/S1 disc herniation, and 10 had S1 root irritation after failed back surgery. Needle placement was successful in 97% of the cases, and no complications occurred. Outcome was evaluated 1–6 months (mean 2.2 months) after the procedure and was comparable to that of other studies using fluoroscopy or computed tomography guidance. MR‐guided placement of the needle is an accurate technique for first sacral root infiltration. J. Magn. Reson. Imaging 2000;12:556–561. © 2000 Wiley‐Liss, Inc.