title: MR imaging of the wrist: effect on clinical diagnosis and patient care.
abstract: OBJECTIVE
  To evaluate the effect of magnetic resonance (MR) imaging of the wrist on clinicians' diagnoses, diagnostic certainty, and patient care.
  
  
  METHODS
  A controlled observational study was performed. Referring clinicians completed questionnaires about diagnosis and intended management before and after wrist MR imaging. One hundred eighteen consecutive patients referred for MR imaging of the wrist were recruited from the MR imaging units at a regional teaching hospital and a large district general hospital. The main measures were changes in the clinicians' leading and subsidiary diagnoses after MR imaging, their certainty in these diagnoses, and changes in intended patient care.
  
  
  RESULTS
  Questionnaires were incorrectly completed for five patients, questionnaires were not returned for three, appointments were canceled for 10, and two could not tolerate the MR examination. Complete follow-up data were available for 98 patients. The clinical diagnosis changed in 55 of 98 patients; in the remaining 43 patients, diagnostic certainty increased in 23. Clinicians reported that MR imaging had substantially improved their understanding of the disease in 67 of 98 patients. The care plan changed in 45 of 98 patients, with a shift away from surgical treatment. Twenty-eight patients were discharged without further investigation. MR imaging was similarly effective in the regional teaching center and the district general hospital.
  
  
  CONCLUSIONS
  MR imaging of the wrist influences clinicians' diagnoses and management plans.
authors.affiliation: Orthopedic Research Unit, Addenbrooke's Hospital, Hills Rd, Cambridge CB2 2QQ, England.
authors.forename: J L
authors.initials: JL
authors.lastname: Hobby
authors.forename: A K
authors.initials: AK
authors.lastname: Dixon
authors.forename: P W
authors.initials: PW
authors.lastname: Bearcroft
authors.forename: B D
authors.initials: BD
authors.lastname: Tom
authors.forename: D J
authors.initials: DJ
authors.lastname: Lomas
authors.forename: N
authors.initials: N
authors.lastname: Rushton
authors.forename: M H
authors.initials: MH
authors.lastname: Matthewson
mesh_terms: D006801:Humans; D008279:Magnetic Resonance Imaging; D009140:Musculoskeletal Diseases / Q000175:diagnosis; D011795:Surveys and Questionnaires; D014953:Wrist