Table 6 Objective image quality parameters inD2 and R4 group

Image quality score

4.84 ± 0.49

4.44 ± 0.57

0.49

Liver SUVmax

10.2 ± 3.4 [6.1–20.9]

9.6 ± 2.4 [4.3–15.3]

0.51

Liver SUVmean

8.6 ± 2.7 [5.7–17.2]

8.4 ± 2.1 [3.7–12.7]

0.85

Liver SNR

13.4 ± 4.4 [6.9–23.8]

14.7 ± 3.9 [5.8–25.4]

0.41

CV_liver, %

8.3 ± 0.3 [4.2–14.6]

7.3 ± 2.2 [3.8–17.1]

0.13

Blood pool SUVmax

0.7 ± 0.3 [0.4–1.3]

0.5 ± 0.2 [0.2–1.4]

0.08

Blood pool SUVmean

0.6 ± 0.2 [0.3–1.1]

0.5 ± 0.2 [0.2–1.1]

0.14

CV_{blood, %}

10.2 ± 5.2 [4.8–22.0]

9.3 ± 3.5 [2.9–27.7]

0.41

Lesions SUVmax

19.4 ± 17.1 [1.6–43.2]

24.7 ± 40.5 [1.6–232.1]

0.73

TLR

3.1 ± 4.6 [0.2–26.5]

3.1 ± 5.0 [0.2–28.7]

0.58

TMR

35.8 42.8 [4.7–130.9]

55.2 ± 54.0 [4.1–209.1]

0.37