Table 2.

Contrast appearances of 42 HCC lesions observed by two modalities of CEUS and the corresponding SOR results.

Contrast enhancement pattern	Number of lesions
RT confirmed by SOR	9
Nodular enhance pattern(RT)
Observed on 2D-CEUS alone (not successfully displayed on 3D-CEUS)	3
Observed on 3D-CEUS alone (not observed on 2D-CEUS)	3
Observed on both 2D-CEUS and 3D-CEUS	3
CR confirmed by SOR	33
Rim enhanced pattern (CR)
Thin (observed on both 2D-CEUS and 3D-CEUS)	7
Rough (observed on both 2D-CEUS and 3D-CEUS)	3
Without enhancement(CR)
Observed on both 2D-CEUS and 3D-CEUS	18
Observed on 2D-CEUS alone (not definite determined on 3D-CEUS)	5

CEUS: contrast-enhanced ultrasound; SOR: standard of reference; RT: residual tumor; CR: complete response.