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Fig. 12B. —Tiny distal common bile duct stone in 55-year-old man with painful jaundice. Conventional sagittal sonogram (A) and tissue harmonic image (B) show small stone (arrow) distinctly. However, tissue harmonic image shows longer length of common bile duct with blacker lumen. Better definition of acoustic shadow distal to stone on tissue harmonic image is related to increase in image contrast with increased whiteness of echoes on either side of shadow.

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