Objective: We aimed to investigate the feasibility of multi-acquisition with variable
resonance image combination slab selectivity inversion recovery (MAVRIC SL IR) sequence on 3.0
T MRI in patients with anterior cervical discectomy and fusion (ACDF) surgery compared to
bandwidth-optimized short tau inversion recovery (STIR) sequence.
Methods: Paired sagittal MR images of MAVRIC SL IR and bandwidth-optimized STIR sequences
were acquired and analyzed for 21 patients after ACDF surgery with PEEK cage-plate construct.
Quantitative comparisons were made on the metal artifact areas of paired mid-sagittal images. In
qualitative analysis, the consistency of fat suppression and visibility of anatomic structures (bonemetal
interface, surrounding soft tissues, and spinal cord) were independently assessed, based on a
five-point scale by two musculoskeletal radiologists, who were blind to the images and patient
Results: The application of the MAVRIC SL IR sequence resulted in a significant reduction of 48%
in the mean area of metal artifacts (t = -7.141, p < 0.001). Based on the comments received from
both the reviewers, the MAVRIC SL IR sequence showed greater visibility of the bone-metal
interface (p < 0.001), considerable visibility of the surrounding soft tissues (p > 0.05) but worse
visibility of the spinal cord (p < 0.001), including the consistency of fat suppression (p < 0.001)
relative to the bandwidth-optimized STIR sequence.
Conclusion: With significantly reduced metal artifacts, the MAVRIC SL IR sequence can be
implemented in patients undergoing ACDF surgery with PEEK cage-plate construct for 3.0 T MRI,
despite the poor visibility of the spinal cord.