Table 4.

Concordance of lesion categorization by PI-RADSv2 and in-house systems. Parentheses indicate (% true positive for all cancer | % true positive for clinically significant cancer).

In-house system categorization	PI-RADSv2 Lesion Categorization
	1	2	3	4	5
1	2 (0% | 0%)	56 (16.1% | 7.1%)	39 (15.4% | 5.1%)	3 (33.3% | 0%)	0
2	2 (50% | 0%)	29 (24.1% | 13.8%)	53 (30.2% | 18.9%)	33 (18.2% | 6.1%)	0
3	0	8 (37.5% | 12.5%)	37 (24.3% | 8.1%)	259 (41.3% | 24.0%)	20 (55% | 35%)
4	0	0	2 (50% | 50%)	6 (83.3% | 50%)	52 (78.8% | 67.3%)
5	0	1 (0% | 0%)	2 (50% | 0%)	2 (50% | 0%)	127 (95.3% | 80.3%)