title: Comparison of three imaging techniques in diagnosis of chondrocalcinosis of the knees in calcium pyrophosphate deposition disease.
abstract: OBJECTIVE
  To study the role of different imaging modalities, ultrasonography, conventional radiography (CR) and CT, in visualization of chondrocalcinosis of the knees in patients with CPDD.
  
  
  METHODS
  Twenty-five patients (14 males and 11 females) with CPDD were enrolled in the study. Diagnosis was made according to D.J. McCarty classification criteria. All patients had arthritis of the knee and underwent aspiration of SF from the knee and microscopic investigation of SF samples. Diagnosis of CPDD was crystal proven. Three imaging methods were performed in patients: CR, CT and US of the knees.
  
  
  RESULTS
  CR of the knee confirmed cartilage calcification (CC) in 13 patients, CT in 18 patients and US in 25 patients. No difference in age or disease duration between patients with CC detected by different imaging methods was found.
  
  
  CONCLUSIONS
  US appeared to be a helpful tool, possibly better than CR or CT, in revealing CC in patients with CPDD. Informativity of CT and CR in the detection of CC is almost equal.
authors: Department of Microcrystallic Arthritis, Federal State Budgetary Institution Research Institute of Rheumatology under the Russian Academy of Medical Sciences, Moscow, Russian Federation. barskova@irramn.ru
authors: Victoria G
authors: VG
authors: Barskova
authors: Fatima M
authors: FM
authors: Kudaeva
authors: Liliya A
authors: LA
authors: Bozhieva
authors: Alexander V
authors: AV
authors: Smirnov
authors: Alexander V
authors: AV
authors: Volkov
authors: Evgenii L
authors: EL
authors: Nasonov
mesh_terms: D000328:Adult; D001168:Arthritis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002131:Calcium Pyrophosphate; D002805:Chondrocalcinosis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003952:Diagnostic Imaging / Q000379:methods*; D005260:Female; D006801:Humans; D007717:Knee / Q000000981:diagnostic imaging; D007719:Knee Joint / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014463:Ultrasonography
chemical_list: D002131:Calcium Pyrophosphate
keywords: CPDD; chondrocalcinosis; computed tomography; conventional radiography; imaging; ultrasonography