Transient hepatic attenuation differences in focal hepatic lesions: dynamic CT features.

Kim HJ, Kim AY, Kim TK, et al. he widespread use of dual-phase dynamic CT has led to an improvement in the characterization and detection of focal hepatic lesions by highlighting the dynamic contrastenhancement features. Transient hepatic attenuation difference (THAD) is an attenuation difference of the liver appearing during bolus-enhanced dynamic CT and not corresponding to mass [1]. THAD is generally seen as an area of high attenuation on the hepatic arterial phase image that returns to normal attenuation on the portal venous phase image. THADs that are associated with hepatic tumors are generally characteristic of

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