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. Author manuscript; available in PMC: 2015 Aug 28.
Published in final edited form as: Gastrointest Endosc. 2012 Apr 11;75(6):1175–1183. doi: 10.1016/j.gie.2012.01.039

Figure 2. Calibration experiments.

Figure 2

Figure 2

Calibration was performed by measuring the RF EUS signal reflected from a flat plastic reflector using an appropriate phantom material to prevent signal saturation. (A) Radial echoendoscope. (B) Curvilinear echoendoscope. In both cases, the green arrows on the right side of the display indicate the focus of the transducer.