The Diagnostic Ability of rs-DWI to Detect Subtle Acute Infarction Lesion in the Different Regions of the Brain and the Comparison between Different b-Values

Table 4

Statistical analysis of the diagnostic ability between ss-DWI and rs-DWI in each anatomical region of the brain.

Regions	True Positive		True Negative		False Positive		False Negative		Statistical Analysis (%)
									Sensitivity		Specificity		PPV		NPV
	ss-DWI	rs-DWI	ss-DWI	rs-DWI	ss-DWI	rs-DWI	ss-DWI	rs-DWI	ss-DWI	rs-DWI	ss-DWI	rs-DWI	ss-DWI	rs-DWI	ss-DWI	rs-DWI
Frontal Cortex	88	110	0	9	9	0	22	0	80	100	0	100	80	100	0	100
Parietal Cortex	55	61	0	0	4	1	7	4	93	98.3	0	100	88.7	100	0	80
Insular Cortex	4	6	0	0	2	0	0	0	66.6	100	N/A	N/A	100	100	N/A	N/A
Temporal Cortex	25	27	0	0	2	0	2	2	92.5	100	0	100	92.5	100	0	100
Occipital Cortex	30	32	0	0	2	0	2	2	93.8	100	0	100	93.8	100	0	100
White Matter	85	112	1	1	3	0	27	2	75.8	100	25	66.6	96.5	99	3	100
Basal Ganglia	16	17	0	0	0	0	1	0	94.1	100	N/A	N/A	100	100	0	N/A
Brain Stem	4	4	0	0	0	0	0	0	100	100	N/A	N/A	100	100	0	N/A
Cerebellum	11	16	0	0	0	0	5	0	68.8	100	N/A	N/A	100	100	0	N/A

ss-DWI: single shot Diffusion Weighted Imaging; rs-DWI: readout segment-Diffusion Weighted imaging; PPV: positive predictive value; NPV: negative predictive value.