ISSN 1305-3825 | E-ISSN 1305-3612
Abdominal Imaging - Pictorial Essay
Transient hepatic attenuation differences at biphasic spiral CT examinations
1 Department of Radiology, Adnan Menderes University School of Medicine, Aydın, Turkey  
2 Department of Radiology, Adnan Menderes University School of Medicine, Aydın, Turkey  
3 From the Department of Radiology, Adnan Menderes University School of Medicine, Aydın, Turkey  
4 Department of Radiology, Adnan Menderes University Faculty of Medicine, Aydın, Turkey  
Diagn Interv Radiol 2005; 11: 96-101

Key Words: tumor, liver, tomography, spiral computed
Abstract

Transient hepatic attenuation difference (THAD) is a perfusion disorder that can sometimes be observed in hepatic arterial phase of a biphasic spiral CT examination. The involved site of liver by THAD appears as an area of high attenuation on the hepatic arterial phase image and returns to normal attenuation on portal venous phase image. The knowledge of the shape, distribution and causes of THAD is essential to differentiate the THAD from other pathologies such as neoplasm.

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