Feasibility of diffusion tensor imaging in cervical spondylotic myelopathy using MUSE sequence

Area of Science:

• Neuroimaging
• Spinal Cord Imaging
• Diffusion Tensor Imaging

Background:

• Cervical spondylotic myelopathy (CSM) is a frequent spinal cord injury.
• Conventional MRI is standard, but Diffusion Tensor Imaging (DTI) can detect early microstructural changes.
• Traditional DTI has limitations in spinal cord imaging due to anatomy and field of view; MUSE-DTI offers higher signal intensity.

Purpose of the Study:

• To evaluate the clinical diagnostic value of a novel MUSE-DTI protocol in patients with CSM.
• To assess if MUSE-DTI can improve spinal cord imaging quality for CSM diagnosis.

Main Methods:

• A prospective study enrolled 51 CSM patients and 9 healthy controls.
• MUSE-DTI was performed on a 3.0T MR scanner, with analysis of Fractional Anisotropy (FA), Mean Diffusivity (MD), Axial Diffusivity (AD), and Radial Diffusivity (RD).
• Clinical severity was assessed using the Japanese Orthopedic Association (JOA) scale, and spinal canal stenosis was graded.

Main Results:

• MUSE-DTI provided higher resolution images compared to traditional DTI.
• Diffusion parameters (FA, MD, AD, RD) showed grade-dependent trends correlating with CSM severity.
• AD values at C2 were lower in CSM patients than controls, and all measured parameters correlated significantly with JOA scores.

Conclusions:

• MUSE-DTI demonstrates superior image quality and provides diffusion parameters that correlate with CSM severity and clinical outcomes.
• The study suggests MUSE-DTI parameters are reliable biomarkers for auxiliary diagnosis of spinal cord injury severity in CSM.
• AD values at C2 may indicate secondary damage to the distal spinal cord.