arterial phase enhancement
Early contrast enhancement pattern occurring 20-30 seconds post-injection, indicating high vascularity.
Full Definition
Arterial phase enhancement refers to the rapid uptake of contrast material by tissues during the arterial phase of imaging, typically occurring 20-30 seconds after intravenous injection. This enhancement pattern is crucial for characterizing hypervascular tumors such as hepatocellular carcinoma, neuroendocrine tumors, and renal cell carcinoma. The timing and degree of arterial enhancement help differentiate malignant from benign lesions and guide treatment planning. Proper recognition of arterial enhancement patterns is essential for accurate tumor staging and monitoring treatment response.
Usage
Usage note: Distinguish from venous or delayed phase enhancement when describing contrast timing.
In Context
- "The hepatic lesion demonstrated intense arterial phase enhancement with rapid washout, consistent with hepatocellular carcinoma." — CT imaging report
- "Arterial phase enhancement was noted in the pancreatic tail mass, raising suspicion for neuroendocrine tumor." — Radiology consultation