title: UpRight: a radiographic marker that displays upright angle on portable chest and abdominal radiographs.
authors.affiliation: National Institutes of Health (NIH), Bethesda, Maryland, USA.
authors.forename: Les
authors.initials: L
authors.lastname: Folio
authors.forename: Michael
authors.initials: M
authors.lastname: Spivey
authors.forename: Jennifer F
authors.initials: JF
authors.lastname: Chaney
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D057918:Fiducial Markers; D006801:Humans; D010865:Pilot Projects; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D011860:Radiography, Abdominal / Q000295:instrumentation*; D013902:Radiography, Thoracic / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity