Fig. 11From: Ultrasonic pitch and catch technique for non-destructive testing of reinforced concrete slabs2D image obtained from the UPC device’s proprietary software . a 2D image at the location of the fully-bonded rebars (refer to section 1–1 in Fig. 4a). b 2D image at the location of artificial debonded rebars (refer to section 2–2 in Fig. 4a). c 2D image obtained at the location of artificial voids (refer to section 3–3 in Fig. 4a)Back to article page