Figure 3.

The top row shows examples for brain metastases correctly identified by the automated system. Green line depicts ground-truth contour and blue line depicts AI-generated contour. The bottom row shows lesions detected by the AI system, which were not manually contoured. Visual investigation by a neuroradiologist indicated that (a) is likely leptomeningial metastasis, (b) is a suspected true positive intra parenchymal metastasis, (c) is a vessel (better appreciated by studying this and surrounding slices), and (d) is a leptomeningeal, likely subarachnoid, metastasis.