Diffusion weighted imaging in the liver

Table 2 Performance of DWI and conventional MRI in the detection of liver metastases n (%)

Study	Sensitivity	Specificity	Accuracy	PPV	NPV
Vandecaveye et al[30]
> 20 mm
B600 SI ratio	100	81.8	94.9	93.3	100
T2-CE MRI	96.4	81.8	92.3	93.1	90.0
< 20 mm
B600SI ratio	91.2	82.9	86.7	81.6	91.9
T2-CE MRI	67.6	61.0	64.0	59.0	69.4
Koh et al[32]1
MnDPDP MRI	81.3	93.0	88-92
DWI 0, 150, 500 BH	78.3	95.0	83-90
MnDPDP MRI and DWI	92.2	97.0	94-96
DWI RT	88-91
T2 MRI	45-62
Nasu et al[36]
DWI RT (0, 500)	82	94
SPIO MRI	66	90

¹In this study, 2 observers reviewed the images. The given values in sensitivity, specificity and diagnostic accuracy refer to the separate results of both observers. PPV: Positive predictive value; NPV: Negative predictive value.