Table 4 Scores for tumor visibility and expected technical feasibility on US-FI and CEUS-CT/MR FI

Total

1.9 ± 0.6

3.4 ± 0.7

< 0.001

2.9 ± 0.8

3.6 ± 0.6

< 0.001

By location

Left lobe

2.0 ± 0.7

3.5 ± 0.7

< 0.001

2.8 ± 0.8

3.5 ± 0.6

< 0.001

Right superior segments

1.9 ± 0.6

3.3 ± 0.8

< 0.001

2.8 ± 0.8

3.5 ± 0.7

< 0.001

Right inferior segments

1.9 ± 0.6

3.4 ± 0.7

< 0.001

3.0 ± 0.8

3.8 ± 0.5

< 0.001

By size

< 2 cm

1.8 ± 0.6

3.3 ± 0.8

< 0.001

2.8 ± 0.9

3.6 ± 0.7

< 0.001

≥ 2 cm, < 2.5 cm

2.0 ± 0.5

3.6 ± 0.5

< 0.001

3.0 ± 0.7

3.7 ± 0.5

< 0.001

≥ 2.5 cm

2.4 ± 0.5

3.6 ± 0.5

< 0.001

3.3 ± 0.6

3.7 ± 0.5

0.014

By contrast agent

SonoVue

1.9 ± 0.7

3.4 ± 0.8

< 0.001

2.9 ± 0.9

3.7 ± 0.6

< 0.001

Sonazoid

1.8 ± 0.5

3.4 ± 0.7

< 0.001

2.8 ± 0.8

3.6 ± 0.6

< 0.001