Simplified intravoxel incoherent motion diffusion-weighted MRI of liver lesions: feasibility of combined two-colour index maps

European Radiology Experimental

Table. 5 Results of visual judgment of index maps I_ADC, I_D, I_f, and combined I_Df

Parameter	Definite				Probable				All
Parameter	TN	FN	FP	TP	TN	FN	FP	TP	N	P	T	Sen	Spec	Acc
Investigator 1
I_ADC	28	2	3	65	1	2	3	5	35	74	109	0.946	0.829	0.908
I_D	22	1	13	73	0	0	0	0	35	74	109	0.986	0.629	0.872
I_f	6	1	23	73	4	0	2	0	35	74	109	0.986	0.286	0.761
I_Df	26	2	1	66	6	0	2	6	35	74	109	0.973	0.914	0.954
Investigator 1 repeated after 4 months
I_ADC	28	2	3	65	1	2	3	5	35	74	109	0.946	0.829	0.908
I_Df	26	2	1	66	6	0	2	6	35	74	109	0.973	0.914	0.954
Investigator 2
I_ADC	28	2	3	65	1	2	3	5	35	74	109	0.946	0.829	0.908
I_Df	26	2	1	66	6	0	2	6	35	74	109	0.973	0.914	0.954

Acc Accuracy, FN False negative cases, FP False positive cases, N Number of benign cases (TN + FP), P Number of malignant cases (TN + FP), T Total number of cases (N + P), TN True negative cases, Sen Sensitivity, Spec Specificity, TP True positive cases