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- Title
Dixon T2 imaging of vertebral bone edema: reliability and comparison with short tau inversion recovery.
- Authors
Dagestad, Magnhild H; Toppe, Monika K; Kristoffersen, Per M; Gjefsen, Elisabeth; Andersen, Erling; Assmus, Jörg; Vetti, Nils; Espeland, Ansgar
- Abstract
Background: It is uncertain whether T2-weighted Dixon water images (DixonT2w) and short tau inversion recovery (STIR) are interchangeable when evaluating vertebral bone edema, or if one method is superior or visualizes the edema differently. Purpose: To compare image quality and Modic change (MC)-related edema between DixonT2w and STIR and estimate inter-observer reliability for MC edema on DixonT2w. Material and Methods: Consecutive patients (n = 120) considered for the Antibiotics in Modic changes (AIM) trial underwent lumbar 1.5-T magnetic resonance imaging with two-point DixonT2w and STIR. Two radiologists assessed MC-related high-signal lesions on DixonT2w and compared image quality and lesion extent with STIR. Cohen's kappa and mean of differences ± limits of agreement were calculated. Results: Fat suppression and artefacts were similar on DixonT2w and STIR in 116 of 120 (97%) patients. Lesion conspicuity was similar in 88, better on STIR in 10, and better on DixonT2w in 9 of 107 patients with MC-related high-signal lesions. Contrast-to-noise ratio for STIR versus DixonT2w was 19.1 versus 17.1 (mean of differences 2.0 ± 8.2). Of 228 lesions L4-S1, 215 (94%) had similar extent on DixonT2w and STIR, 11 were smaller/undetected on STIR, and two were smaller/undetected on DixonT2w. Lesions missed on STIR (n = 9) or DixonT2w (n = 1) had a weak signal increase on the other sequence (≤17%; 0% = vertebral body, 100% = cerebrospinal fluid). Inter-observer reliability (mean kappa L4-S1) was very good for presence (0.87), moderate for height (0.44), and good for volume (0.63) of lesions on DixonT2w. Conclusion: DixonT2w provided similar visualization of MC-related vertebral edema as STIR.
- Subjects
EDEMA; MAGNETIC resonance imaging; INTER-observer reliability; CEREBROSPINAL fluid; MYELOGRAPHY
- Publication
Acta Radiologica, 2024, Vol 65, Issue 3, p273
- ISSN
0284-1851
- Publication type
Article
- DOI
10.1177/02841851221146130