• R U Kothari, T Brott, J P Broderick, W G Barsan, L R Sauerbeck, M Zuccarello, and J Khoury.
• Department of Emergency Medicine, University of Cincinnati, Ohio 45267-0769, USA. Rashmikant.Kothari@uc.edu
• Stroke. 1996 Aug 1; 27 (8): 1304-5.

Background And PurposeHemorrhage 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.MethodsThe 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.ResultsThe 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.ConclusionsWe conclude that ICH volume can be accurately estimated in less than 1 minute with the simple formula ABC/2.

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