ABSTRACT
Utilization of various gases as contrast media for myelography has been known as pneumomyelography or gas myelography. The introduction of iodized oils and water-soluble iodine compounds as contrast media has delayed a broader clinical application of the negative contrast myelography. The technique of gas myelography varies and depends to a greater extent on the personal experiences of the investigator and the radiographic equipment. Indications for Gas Myelography may vary considerably and depend largely on the preferences and experience of the investigator, as well as on the accepted type of examination. Complications related to gas myelography are usually similar to those observed in pneumoencephalography. In the anteroposterior projection, the dorsal subarachnoid space filled with gas appears in the shape of two linear radiolucencies surrounding the spinal cord. Errors in interpretation of gas myelograms are considerably reduced if polytomography is employed. The spinal cord, especially in the dorsal area, may appear adherent to the posterior subarachnoid compartment.
