title: A simple method of localizing the level of computed tomography cross sectioning.
abstract: Before computed tomography (CT) scanning, a preliminary radiograph of the area of interest is obtained with a Bell-Thompson ruler on the table top parallel to the spine. This allows precise localization of the level of CT sectioning in relation to the vertebral column.
mesh_terms: D006801:Humans; D013131:Spine / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*