Figure 6
From: Photoacoustic needle improves needle tip visibility during deep peripheral nerve block
Artifacts cause multiple needle tips. Sciatic nerve block on the left side of the cadaver (See Supplemental Digital Content nos. 11 and 18). Combination of reverberation artifact and bayonet artifact (dotted yellow triangle) may cause an illusion of multiple needle tips (display-green; Supplemental Digital Content no. 18). The needle tip without displaying photoacoustic ultrasound cannot be identified (display-off; Supplemental Digital Content no. 11). Display-off: no photoacoustic ultrasound, display-green: photoacoustic ultrasound using green color.
