Table 1.

Summary Description of the Whorl Metrics

Whorl Metrics	Description
Whorl area	Total image area that can be linked to the whorl center via perpendicular vectors
Whorl standard deviation	Spread of the trace endpoints around the whorl center
Spiral fill score	Image area which is connected to the whorl center via a trace using ≤ 5 patches, divided by the total image area within 5 patches of the center
Spiral isotropic score	A measure of the radial symmetry of the traces as they connect to the whorl center (≤5 patches radius)
Spiral score	Spiral fill score divided by spiral isotropic score
Nerve density	Total nerve length near the whorl center, divided by area
Isometric endpoint score	Detects the presence of “ring” endpoint pattern