Figure 1. Comparison of image quality be-tween linear array high frequency probe (Figure1a) and small convex array high frequency probe(Figure 1b) in the same child ’ s brain: The cor-pus callosum (short arrow) and cerebellar vermis(long arrow) can be clearly displayed by convexarray high frequency probe. Figure 2. Compar-ison of image quality between linear array highfrequency probe (Figure 2a) and small convex ar-ray high frequency probe (Figure 2b) in the samechild ’ s pancreas: Small convex array high fre-quency probe can clearly display the pancreatichead and the pancreatic head bile duct(arrow).