RT Journal Article SR Electronic T1 Computed air myelography of the lumbosacral spine. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 609 OP 610 VO 4 IS 3 A1 Tan, W S A1 Spigos, D G A1 Khine, N A1 Capek, V YR 1983 UL http://www.ajnr.org/content/4/3/609.abstract AB Plain computed tomography (CT) of the lumbosacral spine may be a reliable method for diagnosing herniated disk when abundant epidural fat is present. When epidural fat is not sufficient, CT after the administration of nonionic contrast medium (170 mg I/ml) and/or regular metrizamide myelography have been used. Ten patients were studied by CT enhanced with air injected as a negative contrast agent. The findings were correlated with plain and contrast-enhanced (metrizamide) CT as well as conventional myelography. The technique is described and advantages and disadvantages of the method are discussed. Air-contrast CT is useful in the evaluation of herniated disk in cases with equivocal findings on plain CT and in patients with a history of allergic reaction to iodinated contrast media.