Validation

We retrospectively collected a dataset containing 313,318 head CT scans along with their clinical reports from various centers. Of these, 21,095 scans (Qure25k dataset) were used to validate and the rest to develop the algorithms.

Additionally, we collected CQ500 dataset from different centers in two batches B1 & B2 to clinically validate the algorithms. CQ500 dataset contained 491 scans.

The gold standard for CQ500 dataset was consensus of three independent radiologists while the clinical report is considered gold standard for Qure25k dataset.