The ABCs of measuring intracerebral hemorrhage volumes

Stroke. 1996 Aug;27(8):1304-5. doi: 10.1161/01.str.27.8.1304.


Background and purpose: 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.

MeSH terms

  • Blood Volume / physiology*
  • Cerebral Hemorrhage / physiopathology*
  • Humans
  • Intracranial Pressure / physiology
  • Reproducibility of Results
  • Tomography, X-Ray Computed / methods*
  • Tomography, X-Ray Computed / standards