title: Gas-containing gallstones. The sonographic "double echo sign".
authors.affiliation: Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania 19107.
authors.forename: D G
authors.initials: DG
authors.lastname: Mitchell
authors.forename: L
authors.initials: L
authors.lastname: Needleman
authors.forename: S
authors.initials: S
authors.lastname: Frauenhoffer
authors.forename: M
authors.initials: M
authors.lastname: Lutz
authors.forename: R
authors.initials: R
authors.lastname: Wechsler
mesh_terms: D002769:Cholelithiasis / Q000175:diagnosis*; D005740:Gases; D006801:Humans; D014463:Ultrasonography
chemical_list: D005740:Gases