title: Quantifying the extent of femoral head involvement in osteonecrosis.
authors.forename: Hee Joong
authors.initials: HJ
authors.lastname: Kim
authors.forename: Jeong Joon
authors.initials: JJ
authors.lastname: Yoo
authors.forename: Won Seok
authors.initials: WS
authors.lastname: Song
mesh_terms: D005260:Female; D005270:Femur Head / Q000473:pathology*; D005271:Femur Head Necrosis / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011379:Prognosis; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index