Comparing the inter-observer reliability of the Tada formula among neurosurgeons while estimating the intracerebral haematoma volume.

Objective: To compare the inter-observer reliability among neurosurgeons while estimating the intracerebral haematoma (ICH) volume by the Tada formula and assess its influence on predicting the severity and prognosis of various ICHs.

Methods: We obtained clinical data from 262 consecutive patients with spontaneous ICH. The haematoma volume was independently calculated and compared by 3D Slicer and eight neurosurgeons.