Figure 8.

: Transverse ultrasound imaging of fluorescent line. As shown in upper images, metal wire was overlaid on the fluorescent line and fixed in place with a rectangular ultrasound gel pad. Transverse images were obtained as the ultrasound probe followed the course of the metallic wire from PC6 toward PC3. The metal wire is seen as an echogenic white dot (white arrow in left lower picture), casting a B-scan shadow. Color Doppler signal was only seen at the end of scanning (near elbow PC3) but not directly under the metallic wire.