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Abstract
Magnetic resonance imaging is established as the technique of choice for assessment
of degenerative disorders of the lumbar spine. However, it is routinely performed
with the patient supine and the hips and knees flexed. The absence of axial loading
and lumbar extension results in a maximization of spinal canal dimensions, which may
in some cases, result in failure to demonstrate nerve root compression. Attempts have
been made to image the lumbar spine in a more physiological state, either by imaging
with flexion-extension, in the erect position or by using axial loading. This article
reviews the literature relating to the above techniques.