[Sonographic determination of spinal canal width. Comparison of computed tomography, myelography and conventional roentgen study of the lumbar spine].

Sonographic evaluation of the width of the spinal canal is inferior compared to CT or myelography, concerning accuracy and especially quantity of information received. The advantage of sonography is the lacking of X-ray exposure, the non-invasive procedure and the low cost of apparatus and operational time. For these reasons sonography is favoured as a screening method in detecting spinal canal stenosis in a group whose handicap was largely occupational or sport-related.