title: Cone-Beam CT in diagnosis of scaphoid fractures.
abstract: OBJECTIVE
  This prospective study investigated the sensitivity of cone beam computed tomography (CBCT), a low dose technique recently made available for extremity examinations, in detecting scaphoid fractures. Magnetic resonance imaging (MRI) was used as gold standard for scaphoid fractures.
  
  
  METHODS
  A total of 95 patients with a clinically suspected scaphoid fracture were examined with radiography and CBCT in the acute setting. A negative CBCT exam was followed by an MRI within 2 weeks. When a scaphoid fracture was detected on MRI a new CBCT was performed.
  
  
  RESULTS
  Radiography depicted seven scaphoid fractures, all of which were also seen with CBCT. CBCT detected another four scaphoid fractures. With MRI another five scaphoid fractures were identified that were not seen with radiography or with CBCT. These were also not visible on the reexamination CBCT. Sensitivity for radiography was 44, 95 % confidence interval 21-69 %, and for CBCT 69 %, 95 % confidence interval 41-88 % (p = 0.12). Several non-scaphoid fractures in the carpal region were identified, radiography and CBCT depicted 7 and 34, respectively (p < 0.0001).
  
  
  CONCLUSIONS
  CBCT is a superior alternative to radiography, entailing more accurate diagnoses of carpal region fractures, and thereby requiring fewer follow-up MRI examinations. However, CBCT cannot be used to exclude scaphoid fractures, since MRI identified additional occult scaphoid fractures.
authors.affiliation: Department of Radiology, Capio St Göran's Hospital, Stockholm, Sweden.
authors.forename: Rolf
authors.initials: R
authors.lastname: Edlund
authors.affiliation: Department of Radiology, Karolinska University Hospital, Stockholm, Sweden.|Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.
authors.forename: Mikael
authors.initials: M
authors.lastname: Skorpil
authors.affiliation: Department of Radiology, Capio St Göran's Hospital, Stockholm, Sweden.
authors.forename: Gunilla
authors.initials: G
authors.lastname: Lapidus
authors.affiliation: Department of Radiology, Capio St Göran's Hospital, Stockholm, Sweden. jenny.backlund@capiostgoran.se.
authors.forename: Jenny
authors.initials: J
authors.lastname: Bäcklund
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D005260:Female; D005596:Fractures, Closed / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D021361:Scaphoid Bone / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D055815:Young Adult
keywords: Cone-beam computed tomography; Magnetic resonance imaging; Scaphoid bone; Sensitivity