title: The double-line sign.
authors.affiliation: UMDNJ-New Jersey Medical School, Newark, USA.
authors.forename: J V
authors.initials: JV
authors.lastname: Zurlo
mesh_terms: D001842:Bone and Bones / Q000473:pathology; D005270:Femur Head / Q000473:pathology; D005271:Femur Head Necrosis / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D010020:Osteonecrosis / Q000175:diagnosis*