time-to-peak enhancement
The interval from contrast injection to maximum signal intensity in a region of interest during dynamic imaging studies.
Full Definition
Time-to-peak enhancement (TTP) is a quantitative parameter measured during dynamic contrast-enhanced imaging that represents the time interval between contrast material injection and the achievement of maximum signal intensity or enhancement in a specific tissue or vessel region. This measurement is commonly used in perfusion imaging studies of the brain, heart, and tumors to assess tissue vascularity, blood flow characteristics, and capillary permeability. In stroke imaging, delayed TTP may indicate impaired perfusion, while in tumor studies, rapid TTP may suggest high vascularity or angiogenesis. The parameter is typically expressed in seconds and requires precise timing of imaging acquisition relative to contrast injection. Editors should ensure consistent units and clear definition of measurement methodology when reporting TTP values.
Usage
Usage note: Always specify units (seconds) and reference the timing of contrast injection when reporting time-to-peak enhancement values.
In Context
- "The lesion demonstrated a time-to-peak enhancement of 45 seconds, suggesting benign characteristics." — Breast MRI report
- "Prolonged time-to-peak enhancement in the affected territory indicated compromised perfusion." — Stroke imaging analysis