Poster 514 The Inter‐Variability of Four Different Paraspinal Muscles' Measurement Techniques on Lumbar Spine MRI in Patients with Spinal Disorders

Abstract

0.893, and both methods together reported an ICC of 0.970. The Photoshop-assisted percent fatty infiltration method resulted in an ICC of 0.915. for free-hand CSA vs. Photoshopassisted CSA measurements ICCs of 0.945 and 0.873 were found, respectively. Kappa for Goutallier scores were as follows: 0.291 between researchers 1-2, 0.291 between researchers 1-3, and 0.455 between researchers 2-3. Kappa for Quartile scores were 0.534 between researchers 1-2, 0.658 between researcher 1-3, and 0.416 between researchers 2-3. Both Goutallier and Quartile scores showed significantly high correlations with the photoshop-assisted percent fatty infiltration in multifidus (r¼0.886;0.870) and erector spinae (r¼0.828;0.817) muscles at all intervertebral disc levels. Conclusions: We found inter-rater reliability is significantly high in all paraspinal muscle measurements. fCSA with free hand technique had the highest inter-rater reliability and required less time than photoshop-assisted measurements. We had the best inter-rater reliability when we assessed the fatty infiltration in muscle with both Goutallier and Quartile classifications. We recommend fCSA measurement with free hand technique for atrophy, and Goutallier and Quartile classifications together for fatty infiltration assessment.

Lumbar intervertebral disc degeneration, end-plates and paraspinal muscle changes in children and adolescents with low-back pain

“…reported excellent intraobserver (0.840–0.900) and substantial to excellent inter-observer (0.690–0.810) reliability [16]. It has been depicted that Goutallier showed an intraclass correlation coefficient (ICC) of 0.918, quartile showed an ICC of 0.893 and both methods together reported a correlation coefficient of 0.970 for inter-rater reliability of fatty infiltration in the paraspinal muscles [19]. Another author evaluated lumbo-pelvic parameters (lumbar lordosis, pelvic incidence, pelvic tilt and sacral slope) on standing lateral lumbar spine radiographs using a noncommercial software program, Surgimap (Nemaris Inc., New York, USA).…”