Digital image processing, a potential noninvasive technique in the diagnosis of diseased intervertebral discs

The detection of the posterior edge of the L4-L5 intervertebral disc has been accomplished by applying digital image processing techniques on conventional lateral radiograms of the spine, and the method is described. The results of this study have shown that there can be substantial absorption at the site of the disc if the radiogram is properly taken; the existing information on the radiogram can be processed so that an improvement in the diagnostic quality of the radiogram can be achieved; and the edge of the posterior portion of the disc can be determined. This study, although a preliminary one, opens new possibilities for a safer and probably more accurate way of diagnosing herniated discs.