Comparison of volumetric and conventional sequences for the evaluation in magnetic resonance of the lumbar spine
DOI:
https://doi.org/10.53903/01212095.142Keywords:
Magnetic resonance imaging; low back pain; spinal cord; spinal nerve roots.Abstract
Objective: To compare the protocol that includes the three-dimensional SPACE-3D sequence with the conventional protocol in the magnetic resonance imaging (MRI) study of patients with low back pain. Methods: A prospective study of diagnostic tests was carried out, in which MR images of the lumbar spine were taken from 40 patients using a conventional protocol and another protocol that included
a volumetric sequence (SPACE-3D) in conjunction with axial T1 and sagittal STIR sequences, in a 1.5T resonator. The images were interpreted by two radiologists independently, both the conventional protocol and the protocol that included the volumetric sequence, one month apart. Both protocols were compared, calculating the sensitivity and specificity with the confidence interval (CI 95%), a value of p ≤0.05 using the Chi-square test was considered statistically significant. Variables such as the presence or absence of artifacts, disc protrusion/extrusion, narrowing of the central neural canal, lateral recess or root emergence foramen, and presence of radiculopathy, among others, were evaluated for both techniques. Inter- and intra-observer agreement was calculated using the Kappa index with a 95% CI. Results: it was found that the protocol that included the SPACE-3D sequence presents similar diagnostic performance (not inferior) when compared to the protocol with the conventional sequences for the variables evaluated, similarly, abnormal findings were detected, which allowed a complete study and diagnosis in less time. Conclusions: The diagnostic performance of the protocol that includes the SPACE-3D volumetric sequence is similar (not inferior) to the protocol with conventional sequences used in MRI of the lumbar spine and shortens the total study time.
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