Table 5.

Mean and range of the cross-sectional area of true and false positive lesions with point biserial coefficients

	N	False positive mean (range), ml	True positive mean (range), ml	Point biserial coefficient (R pb)	Two-tailed P
Computer-generated lesions	215	12 (0.7–190)	160 (3.3–861)	0.46	<0.0001
All lesions (qualitative)	91	90 (4.0–623)	317 (6.4–1368)	0.32	0.0016
CBV	13	21 (6.3–47)	173 (6.4–880)	0.33	0.27
CBF	19	66 (5.6–356)	246 (9.4–1105)	0.31	0.19
MTT	29	109 (4.0–623)	390 (21–1368)	0.35	0.06
TTP	30	110 (5.6–587)	371 (18–1318)	0.35	0.06