time-attenuation curve
Graph showing contrast enhancement over time in region of interest during dynamic imaging.
Full Definition
A graphical representation that plots the change in image brightness (attenuation) within a defined region of interest over time during dynamic contrast-enhanced imaging studies. In vascular imaging, time-attenuation curves are used to analyze perfusion characteristics, assess contrast kinetics, and identify optimal imaging phases. The curve shape provides information about blood flow, vascular permeability, and tissue enhancement patterns. These curves are fundamental to CT perfusion studies and dynamic contrast-enhanced MRI, helping differentiate normal from pathological tissue enhancement patterns.
Usage
Usage note: Include quantitative parameters when describing curve characteristics in reports.
In Context
- "The time-attenuation curve demonstrated delayed peak enhancement consistent with ischemic tissue." — CT perfusion analysis report
- "Analysis of the time-attenuation curve revealed normal arterial input function." — Dynamic imaging interpretation