title: Detection of a ballpoint pen in a patient's abdomen by sonography.
authors.affiliation: Ultrasound Department, Pomona Valley Hospital Medical Center, California, USA.
authors.forename: Dirk L
authors.initials: DL
authors.lastname: Isaacs
mesh_terms: D034841:Abdominal Cavity / Q000000981:diagnostic imaging* / Q000601:surgery; D001003:Anal Canal; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D005547:Foreign Bodies / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D014463:Ultrasonography