Intracerebral Hemorrhage (ICH)

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

ALTERNATE METHOD

– measure largest diameter – superior to inferior – from the coronal or Sagittarius images = C

Then use formula as above.

REFERENCE:

ENLS 2017

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