How to measure hematoma volume (ABC/2 method) where:
A = greatest diameter of the largest hemorrhage slice
B = diameter perpendicular to A
C = approx # of axial slices with hemorrhage multiplied by the slice thickness
HOW TO CALCULATE VOLUME OF ICH
Measure largest hemorrhage diameter = A
Perpendicular to this line, measure the largest hemorrhage diameter on the same image. = B
Multiply total number of CT slices with hemorrhage by slice thickness = C
*If hematoma area on a slice is ~25-75% of hematoma area on reference slice, then consider half a hemorrhage
**If hematoma area on a slice is <25% of reference slice, then not considered hemorrhage slice.
VOLUME = AxBxC/2
– measure largest diameter – superior to inferior – from the coronal or Sagittarius images = C
Then use formula as above.