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The role of CT scanning as an adjunct to plain roentgenograms of the cervical spine was reviewed in acutely injured blunt trauma patients. Following institution of a protocol to evaluate the cervical spine in all blunt trauma patients, 179 patients underwent CT scanning of their cervical spine. This was performed for patients whose x-ray findings were positive, for patients with plain x-ray films suggestive of a pathologic condition, for patients with plain x-ray films that did not reveal all of the cervical vertebrae, and for patients who had persistent pain or neurologic deficits despite normal plain x-ray films. Of 123 patients not able to have their cervical spine cleared by normal roentgenograms, 93% were cleared within 24 hours of admission based on CT scans. There were no missed injuries in this setting. A false-positive rate of 28% and a false-negative rate of 1.5% were found for plain roentgenograms. Computed …