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Association Between Paraspinal Muscle Morphology, Clinical Symptoms, and Functional Status in Patients With Degenerative Cervical Myelopathy.

Author(s): Fortin M, Dobrescu O, Courtemanche M, Sparrey CJ, Santaguida C, Fehlings MG, Weber MH

Spine (Phila Pa 1976). 2017 Feb 15;42(4):232-239 Authors: Fortin M, Dobrescu O, Courtemanche M, Sparrey CJ, Santaguida C, Fehlings MG, Weber MH

Article GUID: 28207658
Relationship between cervical muscle morphology evaluated by MRI, cervical muscle strength and functional outcomes in patients with degenerative cervical myelopathy.

Author(s): Fortin M, Wilk N, Dobrescu O, Martel P, Santaguida C, Weber MH

Musculoskelet Sci Pract. 2018 12;38:1-7 Authors: Fortin M, Wilk N, Dobrescu O, Martel P, Santaguida C, Weber MH

Article GUID: 30059855
Quantitative Magnetic Resonance Imaging Analysis of the Cervical Spine Extensor Muscles: Intrarater and Interrater Reliability of a Novice and an Experienced Rater.

Author(s): Fortin M, Dobrescu O, Jarzem P, Ouellet J, Weber MH

Asian Spine J. 2018 Feb;12(1):94-102 Authors: Fortin M, Dobrescu O, Jarzem P, Ouellet J, Weber MH

Article GUID: 29503688
Title:Quantitative Magnetic Resonance Imaging Analysis of the Cervical Spine Extensor Muscles: Intrarater and Interrater Reliability of a Novice and an Experienced Rater.
Authors:Fortin M,  Dobrescu O,  Jarzem P,  Ouellet J,  Weber MH
Link:https://www.ncbi.nlm.nih.gov/pubmed/29503688?dopt=Abstract
Category:Asian Spine J
PMID:29503688
Dept Affiliation: PERFORM
1 Division of Orthopedics, Department of Surgery, McGill University, Montreal, QC, Canada.
2 Perform Centre, Concordia University, Montreal, QC, Canada.
3 Faculty of Medicine, McGill University, Montreal, QC, Canada.

Description:

Quantitative Magnetic Resonance Imaging Analysis of the Cervical Spine Extensor Muscles: Intrarater and Interrater Reliability of a Novice and an Experienced Rater.

Asian Spine J. 2018 Feb;12(1):94-102

Authors: Fortin M, Dobrescu O, Jarzem P, Ouellet J, Weber MH

Abstract

Study Design: Reliability study.

Purpose: To examine the reliability of novice and experienced raters for measurements of the size and composition of the cervical extensor muscles using a thresholding technique.

Overview of Literature: Although some authors have reported on the dependability of magnetic resonance imaging (MRI) measurements of the cervical muscles, there remains some variability regarding intrarater and interrater reliabilities, and few studies have examined the associated measurement error. Whether the rater's experience noticeably influences the reliability and precision of such measurements has also not been examined.

Methods: A sample of 10 patients with cervical pathologies was selected. Muscle cross-sectional area (CSA), functional cross-sectional area (FCSA), and signal intensity of the cervical extensor muscles were acquired from axial T2-weighted MRIs by a novice and an experienced rater. All measurements were obtained twice, at least 5 days apart, while the raters were blinded to all earlier measurements.

Results: Interrater reliability estimates (intraclass correlation coefficients) varied between 0.84 and 0.99 for the novice rater and between 0.94 and 0.99 for the experienced rater, indicating excellent reliability. The standard error of measurement for the novice rater was, however, noticeably higher for all cervical muscle measurements. Most of the interrater estimates showed excellent agreement with the exception of CSA measurement of the semispinalis cervicis at C4-C7 and FCSA measurement of the multifidus and semispinalis cervicis at C4-C7, which showed poor interrater reliability.

Conclusions: The proposed method of investigating cervical muscle measurements was highly reliable; however, novice raters should receive adequate training before using this method for diagnostic, research, and clinical purposes.

PMID: 29503688 [PubMed]