MRI is the imaging modality of choice for lumbar spinal stenosis. CT scanning provides excellent central canal, lateral recess, and neuroforaminal visualization. In regard to nuclear imaging, medical diseases related to the bones of the vertebral bodies present with markedly increased nuclide uptake. Angiography is rarely indicated except in patients with arteriovenous malformations, dural fistulas, and vascular spinal tumors. Needle electromyography can help to diagnose lumbosacral radiculopathy with axonal loss. Nerve conduction studies can help to differentiate lumbar spinal stenosis from other confounding neuropathic conditions (eg, lumbosacral plexopathy, generalized peripheral neuropathy, tarsal tunnel syndrome, other mononeuropathies).
For more information about spinal stenosis workup, read here.
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