Table 3 Perfusion parameters of PI between benign and malignant lesions

PI Median

0.459 (0.402,0.486)

0.487 (0.466,0.498)

− 2.104

0.035*

PI Mean

0.456 (0.401,0.476)

0.483 (0.453,0.496)

− 2.993

0.003*

PI Std

0.045 (0.030,0.078)

0.019 (0.008,0.051)

− 2.921

0.003*

PI Q10

0.378 (0.298,0.444)

0.456 ()0.412,0.486

− 3.078

0.002*

PI Q25

0.429 (0.372,0.470)

0.474 (0.441,0.493)

− 2.825

0.005*

PI Q50

0.459 (0.402,0.486)

0.487 (0.466,0.498)

− 2.116

0.034*

PI Q75

0.484 (0.442,0.499)

0.494 (0.478,0.500)

− 1.467

0.142

PI Q90

0.500 (0.473,0.504)

0.500 (0.494,0.504)

− 0.168

0.866