title: The ABCs of measuring intracerebral hemorrhage volumes.
abstract: OBJECTIVE
  Hemorrhage volume is a powerful predictor of 30-day mortality after spontaneous intracerebral hemorrhage (ICH). We compared a bedside method of measuring CT ICH volume with measurements made by computer-assisted planimetric image analysis.
  
  
  METHODS
  The formula ABC/2 was used, where A is the greatest hemorrhage diameter by CT, B is the diameter 90 degrees to A, and C is the approximate number of CT slices with hemorrhage multiplied by the slice thickness.
  
  
  RESULTS
  The ICH volumes for 118 patients were evaluated in a mean of 38 seconds and correlated with planimetric measurements (R2 = 9.6). Interrater and intrarater reliability were excellent, with an intraclass correlation of .99 for both.
  
  
  CONCLUSIONS
  We conclude that ICH volume can be accurately estimated in less than 1 minute with the simple formula ABC/2.
authors.affiliation: Department of Emergency Medicine, University of Cincinnati, Ohio 45267-0769, USA. Rashmikant.Kothari@uc.edu
authors.forename: R U
authors.initials: RU
authors.lastname: Kothari
authors.forename: T
authors.initials: T
authors.lastname: Brott
authors.forename: J P
authors.initials: JP
authors.lastname: Broderick
authors.forename: W G
authors.initials: WG
authors.lastname: Barsan
authors.forename: L R
authors.initials: LR
authors.lastname: Sauerbeck
authors.forename: M
authors.initials: M
authors.lastname: Zuccarello
authors.forename: J
authors.initials: J
authors.lastname: Khoury
mesh_terms: D001810:Blood Volume / Q000502:physiology*; D002543:Cerebral Hemorrhage / Q000503:physiopathology*; D006801:Humans; D007427:Intracranial Pressure / Q000502:physiology; D015203:Reproducibility of Results; D014057:Tomography, X-Ray Computed / Q000379:methods* / Q000592:standards