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3-T MRI in Patients Received Anterior Cervical Discectomy and Fusion Surgery with MAVRIC SL IR Sequence: A Feasibility Study

Author(s):

Renjie Yang, Changsheng Liu, Liang Li, Liang Chen, Weiyin Vivian Liu and Yunfei Zha*  

Abstract:


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 (bone-metal 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 details.

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, 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 obtained 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.

Keywords:

Magnetic resonance imaging, spine, multi-acquisition with variable resonance image combination slab selectivity, metal artifact, fat suppress.

Affiliation:

Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060, Department of Orthopaedics, Renmin Hospital of Wuhan University, Wuhan 4300602Department of Orthopaedics, Renmin Hospital of Wuhan University, Wuhan 430060, MR Research, GE Healthcare, Beijing 100080, Department of Radiology, Renmin Hospital of Wuhan University, Wuhan 430060



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