NeurologyFormula

ABC/2 Method — Intracerebral Hemorrhage (ICH) Volume Calculator

The ABC/2 Method is a validated bedside formula for rapid estimation of intracerebral hemorrhage (ICH) volume on CT scan without volumetric planimetry software. Formula: Volume = (A × B × C) / 2, where A = maximum hemorrhage diameter on hemorrhage slice, B = largest diameter perpendicular to A on same slice, C = number of CT slices with hemorrhage × slice thickness (mm). The ABC/2 method was validated against gold-standard planimetry (r = 0.98) and provides clinically meaningful volume estimation for ICH prognostication and management decisions.

Parameters

A — Maximum Diameter of Hemorrhage on the Largest Hemorrhage Slice (cm)(cm)

B — Maximum Diameter Perpendicular to A on the Same Slice (cm)(cm)

C — Height of Hemorrhage (number of CT slices × slice thickness in cm, e.g., 6 slices × 0.5 cm = 3.0 cm)(cm)

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Fill in the parameters to see your result

NeurologyFormula

ABC/2 Method — Intracerebral Hemorrhage (ICH) Volume Calculator

The ABC/2 Method is a validated bedside formula for rapid estimation of intracerebral hemorrhage (ICH) volume on CT scan without volumetric planimetry software. Formula: Volume = (A × B × C) / 2, where A = maximum hemorrhage diameter on hemorrhage slice, B = largest diameter perpendicular to A on same slice, C = number of CT slices with hemorrhage × slice thickness (mm). The ABC/2 method was validated against gold-standard planimetry (r = 0.98) and provides clinically meaningful volume estimation for ICH prognostication and management decisions.

Parameters

A — Maximum Diameter of Hemorrhage on the Largest Hemorrhage Slice (cm)(cm)

B — Maximum Diameter Perpendicular to A on the Same Slice (cm)(cm)

C — Height of Hemorrhage (number of CT slices × slice thickness in cm, e.g., 6 slices × 0.5 cm = 3.0 cm)(cm)

Awaiting input

Fill in the parameters to see your result