Asian Spine J.  2016 Feb;10(1):59-64. 10.4184/asj.2016.10.1.59.

Comparison with Magnetic Resonance Three-Dimensional Sequence for Lumbar Nerve Root with Intervertebral Foramen

• Takashima
• Takebayashi T
• Shishido H
• Yoshimoto
• Imamura R
• Akatsuka Y
• Terashima
• Fujiwara H
• Nagae M
• Kubo T
• Yamashita

• KMID: 2169281
• DOI: http://doi.org/10.4184/asj.2016.10.1.59

Abstract

STUDY DESIGN: Prospective study based on magnetic resonance (MR) imaging of the lumbar spinal root of the intervertebral foramen. PURPOSE: This study was to compare MR three-dimensional (3D) sequences for the evaluation of the lumbar spinal root of the intervertebral foramen. OVERVIEW OF LITERATURE: The diagnosis of spinal disorders by MR imaging is commonly performed using two-dimensional T1- and T2-weighted images, whereas 3D MR images can be used for acquiring further detailed data using thin slices with multi-planar reconstruction.
METHODS
On twenty healthy volunteers, we investigated the contrast-to-noise ratio (CNR) of the lumbar spinal root of the intervertebral foramen with a 3D balanced sequence. The sequences used were the fast imaging employing steady state acquisition and the coherent oscillatory state acquisition for the manipulation of image contrast (COSMIC). COSMIC can be used with or without fat suppression (FS). We compared these sequence to determine the optimized visualization sequence for the lumbar spinal root of the intervertebral foramen.
RESULTS
For the CNR between the nerve root and the peripheral tissue, these were no significant differences between the sequences at the entry of foramen. There was a significant difference and the highest CNR was seen with COSMIC-FS for the intra- and extra-foramen.
CONCLUSIONS
In this study, the findings suggest that the COSMIC-FS sequences should be used for the internal or external foramen for spinal root disorders.

Keyword

Lumbar nerve root; Intervertebral foramen; Magnetic resonance imaging; Three-dimensional; Coherent oscillatory state acquisition for the manipulation of image contrast; Fast imaging employing steady state acquisition

MeSH Terms

Diagnosis
Healthy Volunteers
Magnetic Resonance Imaging
Prospective Studies
Spinal Nerve Roots