Fig. 4

Multimodal contrast-enhanced ultrasound of tubal patency of a patient with left fallopian tube obstruction. TVS 4D-HyCoSy mode (A), TVS 3D-HyCoSy mode (B), TVS 2D-HyCoSy mode (C), TVS HI mode (D) all show that the right fallopian tube is unobstructed, while the left fallopian tube is blocked (shown by the arrow) (UT: uterus)