With magnetic resonance imaging and computed tomography, there now are
two excellent diagnostic imaging modalities to detect noninvasively t
he presence of lumbar disc abnormalities and to follow the natural his
tory of pathologic changes of a disc, with or without therapeutic inte
rventions. The clinical significance of the information provided by th
ese two imaging methods can be determined only by precise correlation
of the results of a magnetic resonance imaging or computed tomography
study to a patient's history, physical examination, and other diagnost
ic tests. With controlled prospective clinical studies, it may be poss
ible to learn what type of abnormal changes detected on a magnetic res
onance imaging or computed tomography study may have prognostic value
in predicting patient outcome.