Table 1.

Algorithm: CS Indicates Classify–Subtract; CD Indicates Change Detector

Phantom #	Algorithm	Sensitivity—Demanding Criteria (P=0.004)	Sensitivity—Lenient Criteria (P=0.008)	Specificity (P=0.035)
1	CS	0.62	0.71	0.96
	CD	0.93	0.93	1.00
2	CS	0.54	0.77	0.90
	CD	0.87	0.87	1.00
3	CS	0.62	0.77	0.90
	CD	0.94	0.94	1.00
4	CS	0.59	0.71	0.98
	CD	0.95	0.96	1.00
5	CS	0.55	0.77	0.80
	CD	0.68	0.71	0.94
6	CS	0.57	0.75	0.87
	CD	0.82	0.83	1.00
7	CS	0.65	0.78	0.95
	CD	0.90	0.90	1.00
8	CS	0.58	0.72	0.97
	CD	0.85	0.86	0.91
9	CS	0.62	0.74	0.98
	CD	0.94	0.94	1.00

P-values were computed using two-tailed Wilcoxon signed-rank test.