Table 4. Comparison of tumor characteristics, technical feasibility, and technical efficacy according to visibility on B-mode ultrasound.

		Visible category (n=27)	Not visible category (n=12)	p-value
Tumor location (right/left)		12/15	5/7	0.876
Hydrodissection (not used/used)		25/2	12/0	0.753
Size of tumor (cm)		2.43±0.64	1.50±0.34	<0.001
Technical feasibility
	B-mode	2.79±0.63	1.40±0.60	<0.001
	Fusion imaging	3.84±0.39	3.12±0.38	<0.001
Technical efficacy (success/fail)		27/0	12/0	-

Values are presented as number only or mean±standard deviation.

-, not available.