fig5

Figure 5. Example of lymphatic ultrasound at the lymphedematous medial calf using different kinds of probes. Blue circles indicate veins and yellow circles indicate lymphatic vessels. White arrowhead indicates a depth of 5 mm. (A) Ultrasonogram with an 18 MHz linear probe (Noblus EUP-L65; Hitachi Medical Corp., Tokyo, Japan). One vein and one lymphatic vessel can be observed. The dashed circle indicates the lymphatic vessel, which we found only after observing it with a 33MHz probe; (B) Ultrasonogram with a 33 MHz linear probe (Aplio i900, Canon Medical Systems Corp., Tokyo, Japan). One vein and three lymphatic vessels are recognized. There are two lymphatic vessels in the central yellow circle. Compared to A, it can be seen that ultrasound is attenuated in areas deeper than 5 mm, making it difficult to observe.