title: CT of the postoperative lumbar spine: the value of intravenous contrast.
abstract: Sixty-five patients with recurrent radicular complaints after operation for lumbar disc herniation underwent CT examination before and after intravenous contrast application (volume: 1.5-2.0 ml/kg body weight; flow rate: 0.35 ml/s). Postsurgical hypertrophic scar tissue showed definite contrast enhancement, whereas disc herniation remained unenhanced. Intravenous contrast application is recommended in patients previously operated upon for disc herniation.
mesh_terms: D002921:Cicatrix / Q000000981:diagnostic imaging; D004824:Epidural Space; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000000981:diagnostic imaging / Q000601:surgery*; D008159:Lumbar Vertebrae; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D012008:Recurrence; D014057:Tomography, X-Ray Computed