title: [Difference between T1 and T2 weighted MR images in avascular necrosis of the femoral head].
abstract: T1 and T2 weighted MR images were compared in 32 hips with avascular necrosis, and the difference between them was discussed. In 27 of 32 hips, abnormal low intensity area in the affected femoral head is smaller in T2 weighted images than in T1 weighted images. The area of low intensity on T1 weighted image and high on T2 weighted image might be granuloma in reactive tissue and surrounding hyperemia. The difference between T1 and T2 weighted images must be taken into consideration especially in determination of the border of affected bone.
authors.affiliation: Department of Radiology, University of Tokyo.
authors.forename: T
authors.initials: T
authors.lastname: Kokubo
authors.forename: K
authors.initials: K
authors.lastname: Yoshikawa
authors.forename: Y
authors.initials: Y
authors.lastname: Itai
authors.forename: M
authors.initials: M
authors.lastname: Iio
authors.forename: Y
authors.initials: Y
authors.lastname: Takatori
authors.forename: M
authors.initials: M
authors.lastname: Kamogawa
authors.forename: S
authors.initials: S
authors.lastname: Ninomiya
mesh_terms: D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D005271:Femur Head Necrosis / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged