title: The normal conus medullaris: CT criteria for recognition.
abstract: The normal CT configuration and dimension of the conus medullaris and adjacent spinal cord were determined in 30 patients who had no clinical evidence of conus compression. CT studies were also correlated with anatomic sections in cadavers. The normal conus on CT has a distinctive oval configuration, an anterior sulcus, and a posterior promontory. The anteroposterior diameter ranged from 5 to 8 mm; the transverse diameter from 8 to 11 mm. Intramedullary processes altered both the dimensions and configuration of the conus.
mesh_terms: D001254:Astrocytoma / Q000000981:diagnostic imaging; D006801:Humans; D008793:Metrizamide; D009192:Myelography; D011856:Radiographic Image Enhancement; D013116:Spinal Cord / Q000000981:diagnostic imaging*; D013118:Spinal Cord Diseases / Q000000981:diagnostic imaging; D013120:Spinal Cord Neoplasms / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed
chemical_list: D008793:Metrizamide