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Measurements of lesion signal‐noise‐ratio (SNR) for the 2D (IC5‐9‐D) and 3D (RIC5‐9‐D) transducers from anechoic spheres with 4.0 mm (a) and 2.0 mm (b) diameter. Mean ± SD with * and ** indicating statistical significances P < 0.05 and P < 0.01, respectively.
