Table 2 Quantitative subjective scores in terms of five categories of the Ki-30 min images and the Ki-65 min images

Artifact reduction

4.13 ± 0.48

4.11 ± 0.49

-1.51

0.13

Noise suppression

3.81 ± 0.52

3.79 ± 0.52

-1.52

0.13

Contrast retention

4.24 ± 0.58

4.21 ± 0.57

-1.26

0.21

Lesion discrimination

4.38 ± 0.52

4.36 ± 0.53

-0.78

0.44

Overall image quality

4.16 ± 0.53

4.14 ± 0.55

-1.49

0.14