title: [Clinical application of radionuclide bone scintigraphy in diagnosis of avascular osteonecrosis in patients with severe acute respiratory syndrome in convalescence].
abstract: OBJECTIVE
  To evaluate the clinical value of radionuclide bone scintigraphy in diagnosis of avascular osteonecrosis in patients with severe acute respiratory syndrome (SARS) in convalescence.
  
  
  METHODS
  We performed three-phase bone scintigraphy of femoral head regions and whole-body bone scan in SARS patients 4-6 months after they recovered from the syndrome, and then compared the results with simultaneous MRI.
  
  
  RESULTS
  Typical avascular necrosis at different stages and severities was found on bone scintigraphy at 31 femoral heads of 16 SARS patients, 97% of which were MRI positive. Suspicious necrosis was found at 42 femoral heads of 23 patients, 67% of which were MRI negative. Among 30 patients with normal three-phase scintigraphic results, 10% of whom were suspicious on MRI. In addition, abnormal distributions of radioactivity were observed in other bones on the whole-body bone scans of 29 patients, including osteonecrosis of knees in 15 patients.
  
  
  CONCLUSIONS
  Radionuclide bone scintigraphy is valuable in early diagnosis of osteonecrosis in SARS patients in convalescence. It provides a mutually supplementary tool for MRI.
authors.affiliation: Department of Nuclear Medicine, PUMC Hospital, CAMS and PUMC, Beijing 100730, China. bajiantao@sina.com
authors.forename: Jian-Tao
authors.initials: JT
authors.lastname: Ba
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Zhu
authors.forename: Fang
authors.initials: F
authors.lastname: Li
authors.forename: Hai-Qun
authors.initials: HQ
authors.lastname: Xing
authors.forename: Yan-Ru
authors.initials: YR
authors.lastname: Ma
authors.forename: Hong-Li
authors.initials: HL
authors.lastname: Jing
authors.forename: Zheng-Hua
authors.initials: ZH
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D003289:Convalescence; D005260:Female; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010020:Osteonecrosis / Q000000981:diagnostic imaging* / Q000473:pathology*; D011877:Radionuclide Imaging; D045169:Severe Acute Respiratory Syndrome / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D055815:Young Adult