title: Method improves consistency in L5-S1 joint space films.
abstract: This article describes a new way to determine the correct angle of the central ray for radiography of the L5-S1 joint space in the lateral position. The methods described in the most widely used positioning textbooks do not result in consistent results. This article provides an easy-to-apply alternative.
authors.affiliation: Department of Radiographic Science, Idaho State University, Pocatello.
authors.forename: C
authors.initials: C
authors.lastname: Francis
mesh_terms: D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging*; D011859:Radiography; D012447:Sacrum / Q000000981:diagnostic imaging*; D013679:Technology, Radiologic / Q000379:methods