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Table 1 Coefficients of variation (%) for splenic perfusion-related parameters of the different ROIs

From: Impact of region-of-interest size and location on quantitative contrast-enhanced ultrasound of canine splenic perfusion

 

Proximal ROI (A)

Middle ROI (B)

Distal ROI (C)

ROI Max

PEAK

19.46

18.43

21.58

17.89

TTP

24.36

25.59

30.51

22.12

RBV

36.49

38.67

41.68

36.94

RBF

23.92

23.66

24.16

20.76

MTT

29.23

24.48

25.35

21.68

  1. ROI region of interest; Peak peak enhancement; TTP time to peak; RBV Regional blood volume; RBF Regional blood flow; MTT mean transit time