title: Perimeter encoding for teleradiology.
abstract: Perimeter encoding is a technique of data compression that is done simply by outlining the area of interest on an examination. In a sample of 92 emergency room examinations (excluding chest, abdomen, and pelvic exams), 304 films were interpreted by a resident radiologist who indicated the area of interest by marking four corners of a rectangle. The adequacy of the area of interest was determined by a staff osteoradiologist during subsequent review of the films. The amount of data reduction was measured by determining the ratio of the area of interest inside a rectangle to the area of the film (compression ratio). The overall average compression ratio was 3 to 1. This preliminary study suggests that further evaluation of perimeter encoding is warranted.
authors.affiliation: Department of Diagnostic Radiology, University of Kansas Medical Center, Kansas City, KS 66103.
authors.forename: J F
authors.initials: JF
authors.lastname: Caresio
authors.forename: J M
authors.initials: JM
authors.lastname: Bramble
authors.forename: M D
authors.initials: MD
authors.lastname: Murphey
mesh_terms: D004631:Emergency Medical Service Communication Systems; D004632:Emergency Medical Services; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D013685:Telecommunications