Table 2.

MR and MR arthrography detection of acetabular chondral defects compared with arthroscopy

Acetabular chondral defect	Acetabular chondral defects	True positive	True negative	False positive	False negative	Sensitivity compared with arthroscopy (%)	Specificity compared with arthroscopy (%)
Defect on arthroscopy	32	32	11	0	0	100	100
Defect on 3.0-T MR Reader 1	21	21	11	0	11	65	100
Defect on 3.0-T MR Reader 2	19	19	11	0	13	59	100
Defect on 3.0-T MR arthrogram Reader 1	27	26	10	1	6	81	91
Defect on 3.0-T MR arthrogram Reader 2	25	23	9	2	9	71	82