Diagnostic Accuracy of Triphasic CT in Liver Imaging

Technical Differences and Diagnostic Performance

The American College of Radiology recommends triphasic CT for liver lesion characterization, which provides superior diagnostic accuracy of 95.5% compared to standard single-phase IV contrast CT, with an accuracy range of 74-95% for single-phase imaging 1, 2
Multiphase imaging has an accuracy of 91-95% for hemangioma diagnosis, 85-93% for focal nodular hyperplasia, and 96-99% for hepatocellular carcinoma, according to the American College of Radiology 1, 2

The American College of Radiology suggests using triphasic CT in patients with known or suspected hepatocellular carcinoma, as the arterial phase is essential for detecting small HCCs 3
Triphasic CT is also recommended for characterization of indeterminate liver lesions >1 cm, as multiphase imaging improves diagnostic specificity, with a guideline recommendation from the American College of Radiology 1, 2

The American College of Radiology states that CT abdomen with and without IV contrast is not recommended because unenhanced images add no diagnostic value for lesion characterization 1, 2
The American College of Radiology guidelines emphasize the importance of optimal technique requirements, including a slice thickness of 2.5-5 mm for adequate lesion detection, and proper contrast bolus timing to ensure diagnostic accuracy 5