Table 6.

Performance of spell correction on three data sources—test sets

	Breast ultrasound (%)	Head and neck ultrasound (%)	Abdominal and pelvic ultrasound (%)
Precision	90.44	89.67	90.12
Recall	87.59	89.35	89.43
F-measure	88.62	90.08	90.29
Accuracy	81.77	88.56	84.14