A pontine infarct typically has a spheroid shape. The ABC/2 equation can be used to quickly estimate the volume.

Patient selection: pontine infarct with spheroid shape

Measurement: the largest diameter in all 3 perpendicular planes (A, B, C) in brain MRI


volume in cubic cm =

= A * B * C / 2



The more accurate formula is 4 * PI() / 3 * (A * B * C / 8). The result with this equation is 1.047 times the ABC/2 formula, or the ratio of PI()/3.

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