title: [High frequency ultrasonography of the gastrointestinal wall].
abstract: If an ultrasound probe comes close to the area of interest, high ultrasound frequencies can be applied. Endoscopic ultrasonography is performed by means of echoendoscopes or miniature probes using ultrasound frequencies between 7 and 30 MHz. A high frequency ultrasound image of the normal gastrointestinal wall usually shows five layers corresponding closely to the histological layers of the wall. Corrections have to be made, however, for interface echoes between layers with different acoustic impedances. We describe studies performed with the aim of correlating ultrasound images of the normal and diseased gastrointestinal wall with the histology. Ultrasound images of the normal gastrointestinal wall and pathological changes like ischemia, ulcers, tumours and inflammation are presented.
authors.affiliation: Medisinsk avdeling A, Haukeland Sykehus, Bergen.
authors.forename: S
authors.initials: S
authors.lastname: Odegaard
authors.forename: L B
authors.initials: LB
authors.lastname: Nesje
authors.forename: O H
authors.initials: OH
authors.lastname: Gilja
authors.forename: T
authors.initials: T
authors.lastname: Hausken
authors.forename: A
authors.initials: A
authors.lastname: Berstad
authors.forename: R
authors.initials: R
authors.lastname: Eriksen
authors.forename: A
authors.initials: A
authors.lastname: Skarstein
authors.forename: A H
authors.initials: AH
authors.lastname: Cheung
authors.forename: M
authors.initials: M
authors.lastname: Wheeler
authors.forename: M B
authors.initials: MB
authors.lastname: Kimmey
authors.forename: F E
authors.initials: FE
authors.lastname: Silverstein
authors.forename: R W
authors.initials: RW
authors.lastname: Martin
mesh_terms: D005753:Gastric Mucosa / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007413:Intestinal Mucosa / Q000000981:diagnostic imaging* / Q000473:pathology; D014463:Ultrasonography / Q000379:methods
vernacular_title: Høyfrekvent ultrasonografi av gastrointestinalkanalens vegg.