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Background  The dynamic component of disc‐associated cervical spondylomyelopathy ( DA ‐ CSM ) currently is evaluated using traction magnetic resonance imaging ( MRI ), which does not assess changes in flexion and extension of the cervical vertebral column. In humans with cervical spondylotic myelopathy, kinematic  MRI  is used to identify dynamic compressions.    Hypothesis/Objectives  To evaluate the feasibility and utility of  kMRI  in Doberman Pinschers with  DA ‐ CSM  using a novel positioning device. We hypothesized that  kMRI  would identify compressive lesions not observed with neutral positioning and change the dimensions of the spinal cord and cervical vertebral canal.    Animals  Nine client‐owned Doberman Pinschers with  DA ‐ CSM .    Methods  Prospective study. After standard  MR  imaging of the cervical spine confirmed  DA ‐ CSM , dogs were placed on a positioning device to allow imaging in flexion and extension. Morphologic and morphometric assessments were compared between neutral, flexion, and extension images.    Results  Flexion was associated with improvement or resolution of spinal cord compression in 4/9 patients, whereas extension caused worsening of compressions in 6/9 patients. Extension identified 6 new compressive lesions and was significantly associated with dorsal and ventral compression at C5‐C6 ( P  = .021) and C6‐C7 ( P  = .031). A significant decrease in spinal cord height occurred at C6‐C7 from neutral to extension ( P  = .003) and in vertebral canal height at C5‐C6 and C6‐C7 from neutral to extension ( P  = .011 and .017, respectively).    Conclusions and clinical importance  Our results suggest that  kMRI  is feasible and provides additional information beyond what is observed with neutral imaging, primarily when using extension views, in dogs with  DA ‐ CSM .

Kinematic Magnetic Resonance Imaging for Evaluation of Disc‐Associated Cervical Spondylomyelopathy in Doberman Pinschers