title: Localization of knee joint cartilage pathology by multichannel vibroarthrography.
abstract: This paper proposes non-invasive techniques to localize sound or vibroarthrographic (VAG) signal sources in human knee joints. VAG signals from normal subjects, patients who subsequently underwent arthroscopy, and cadavers with arthroscopically-created lesions, obtained by stimulation with a finger tap over the mid-patella and swinging movement of the leg, were analyzed for time delays using cross-correlation functions for source localization. Correct results were obtained for 13 of the 14 subjects tested by finger stimulation, and for 11 of the 12 subjects whose VAG signals during swinging movement were analyzed. The techniques could be valuable in the diagnosis and treatment of knee pathology before and after joint surgery or drug therapy.
authors.affiliation: Department of Electrical and Computer Engineering, University of Calgary, Alberta, Canada.
authors.forename: Y
authors.initials: Y
authors.lastname: Shen
authors.forename: R M
authors.initials: RM
authors.lastname: Rangayyan
authors.forename: G D
authors.initials: GD
authors.lastname: Bell
authors.forename: C B
authors.initials: CB
authors.lastname: Frank
authors.forename: Y T
authors.initials: YT
authors.lastname: Zhang
authors.forename: K O
authors.initials: KO
authors.lastname: Ladly
mesh_terms: D001182:Arthroscopy; D001314:Auscultation / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D002102:Cadaver; D002357:Cartilage Diseases / Q000473:pathology; D002358:Cartilage, Articular / Q000473:pathology*; D005583:Fourier Analysis; D006801:Humans; D007719:Knee Joint / Q000473:pathology*; D010865:Pilot Projects; D016059:Range of Motion, Articular; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013997:Time Factors; D014732:Vibration