perfusion imaging
Advanced MRI or CT technique that measures blood flow and vascular characteristics within tissues.
Full Definition
Perfusion imaging encompasses MRI and CT techniques that assess tissue blood flow, blood volume, and vascular permeability by tracking contrast material passage through the microvasculature. In oncologic radiology, perfusion studies help characterize tumor vascularity, differentiate tumor recurrence from treatment effects, and monitor therapy response. Dynamic susceptibility contrast (DSC) and dynamic contrast-enhanced (DCE) are common MRI perfusion methods, while CT perfusion uses rapid sequential imaging after contrast injection. Parameters such as cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT) provide quantitative metrics for tumor assessment and treatment planning.
Usage
Usage note: Specify perfusion method (DSC, DCE, CTP) and include quantitative parameters when available.
In Context
- "Perfusion imaging demonstrated increased blood volume consistent with tumor recurrence." — Brain tumor follow-up report
- "CT perfusion revealed decreased blood flow in the treatment area, suggesting successful ablation." — Post-treatment assessment