Question

which diagnostic tool is used to measure spinal canal space in cervical myelopathy? ultrasound mri ct scan x - ray

Explanation:

X-rays are the standard initial diagnostic tool to measure spinal canal space (like the sagittal diameter) in cervical myelopathy, as they provide clear visualization of bony spinal structures and canal dimensions. Ultrasound is not used for this purpose, MRI better shows soft tissue, and CT scan is more detailed for bones but not the first/primary tool for measuring this space.

Answer:

X-ray