title: Prevalence of abnormal findings on brain magnetic resonance (MR) examinations in adult participants of brain docking.
abstract: BACKGROUND
  To determine the prevalence of abnormal findings on brain magnetic resonance (MR) examinations in adult participants of brain docking in order to assess its usefulness.
  
  
  METHODS
  We analyzed screening brain MR examinations for 1113 adults (age, 52.6+/-8.5 years; range, 22-84; 761 male and 352 female) performed during 6-year period from April 1998 to March 2004. All participants voluntarily sought a brain MR examination at their own expense. All subjects were studied using the same 1.0-T MR scanner, on axial T1-weighted spin echo (SE) images, proton-density-weighted and T2-weighted fast SE images, and intracranial MR angiography (MRA). All abnormal findings were classified into three basic categories: (1) findings with no referral necessary; (2) findings not requiring further evaluation, but which needed to be reported to the referring physician; (3) findings requiring further evaluation.
  
  
  RESULTS
  Participants with abnormal MR findings requiring further evaluation accounted for 1.3 %, but five of seven suspected intracranial aneurysms were not confirmed by other imaging modalities (false positive). No malignant tumors or other life-threatening pathology was detected, and only three participants (0.27 %) with abnormalities underwent surgical treatment. No participant groups were identified from our data as being high risk for MR abnormal findings requiring further evaluation.
  
  
  CONCLUSIONS
  Brain-docking participants had a variety of abnormalities on brain MR examinations, but only a small percentage of these findings required further evaluation. The usefulness of the brain docking with MRI and MRA has yet to be proven, and at this time we cannot approve this screening procedure.
authors.affiliation: Department of Radiology, Motojima General Hospital, Ohta, 373-0033 Japan. yoshito@xa2.so-net.ne.jp
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Tsushima
authors.forename: Ayako
authors.initials: A
authors.lastname: Taketomi-Takahashi
authors.forename: Keigo
authors.initials: K
authors.lastname: Endo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001921:Brain / Q000473:pathology*; D001927:Brain Diseases / Q000175:diagnosis* / Q000453:epidemiology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008875:Middle Aged; D010808:Physical Examination; D015995:Prevalence; D012189:Retrospective Studies