Comparison of different MR sequences to evaluate subchondral bone marrow edema in sacroiliac joint in patients with low back pain using CNR and SNR

Congress:

ECR 2020

Poster Number:

C-12409

Type:

Scientific Exhibit

Keywords:

Musculoskeletal, Musculoskeletal bone, Musculoskeletal joint, MR, Imaging sequences, Inflammation, Retrospective, Observational, Performed at one institution

Authors:

R. B. Leite, J. E. M. Santos, K. A. C. Daros, A. Puchnick, E. D. �. Fernandes; São Paulo/BR

DOI:

10.26044/ecr2020/C-12409

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-12409

Fig. 1: Illustrative schematic of region of interest (ROI) assessment covering two...

Fig. 2: Comparison of the contrast-noise relationship between the different sequences...

Fig. 3: Comparison of signal-to-noise ratio between the different sequences and between...

Purpose

The main purpose is to compare MRI sequences [inversion recovery sequence (STIR), T1 gadolinium fat saturation fast echo (T1 / Gd), diffusion-weighted images (DWI) with two different b values] using contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR) in areas of subchondral bone marrow edema (SBME) in patients with low back pain. As a secondary objective, to define whether the magnetic field (1.5T and 3.0T) interferes with the correlation between signal / noise and contrast / noise.

Methods and materials

This retrospective observational study was approved by the research ethics board and included 63 patients underwent sacroiliac MR exams for evaluation of sacroiliitis or low back pain with more than three months of complaint. Inclusion criteria were patients older than 20 years, complaining of low back pain lasting more than three months. Exclusion criteria included patients under 20 years of age with spinal implants,SIJor spine infection, claustrophobia and pregnancy. Exams were performed on 1.5T and 3.0T MR scanners. All patients had all four MR sequences...

Results

We evaluated 114 SBME areas in the sacroiliac joint, 59 on 1.5T MR and 55 on 3.0T MR. There were no differences in CNR values between all sequences (Figure 02). The sequences behavior was the same in both magnetic fields, except for DWI b50 which showed higher CNR values at 3.0T and CNR values equal to T1/Gd. There was a significant difference between SNR values (p

Conclusion

STIR and DWI b50 RM sequences showed no difference in SBME signal evaluation. DWI b50 is a promising sequence to replace the T1/Gd sequence inSBME display in patients with contraindication of contrast with no signal loss. Further studies are needed to decrease standard error.

Personal information and conflict of interest

R. B. Leite; São Paulo/BR - nothing to disclose J. E. M. Santos; São Paulo/BR - nothing to disclose K. A. C. Daros; São Paulo/BR - nothing to disclose A. Puchnick; São Paulo/BR - nothing to disclose E. D. Á. Fernandes; São Paulo/BR - nothing to disclose

References

DALTO, V.; ASSAD, R.; CREMA, M.; LOUZADA JUNIOR, P.; NOGUEIRA-BARBOSA, M. MRI assessment of bone marrow oedema in the sacroiliac joints of patients with spondyloarthritis: is the SPAIR T2w technique comparable to STIR? Eur Radiol., v. 27, n. 9, p. 3669-76, 2017. IMKAMP, M.; LIMA PASSOS, V.; BOONEN, A.; et al. Uncovering the heterogeneity of disease impact in axial spondyloarthritis: bivariate trajectories of disease activity and quality of life. RMD open, 2018. KUCYBAŁA, I.; URBANIK, A.; WOJCIECHOWSKI, W. Radiologic approach to axial spondyloarthritis: where are...