Sector computed tomographic spine scanning in the diagnosis of lumbar nerve root entrapment.

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Abstract
The diagnosis of lumbar nerve root entrapment was made by sector computed tomography (CT) scanning in 25 patients whose myelograms were normal at the site of the CT scan abnormalities. Sector CT scanning demonstrates preoperatively which neural foramina are narrow. This information, correlated with the patient''s history and physical examination, indicates which foramina should be operated on and prevents unnecessary exploration of normal neural foramina. CT findings were confirmed surgically in 14 patients. Of these 14 patients, 11 had excellent postoperative results and remain pain free.

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