bolus timing
Technique to synchronize image acquisition with peak arterial contrast enhancement.
Full Definition
A computed tomography angiography technique used to determine the optimal delay between contrast injection and image acquisition to capture peak arterial enhancement. The process typically involves injecting a small test bolus of contrast material and monitoring enhancement in the target vessel using serial low-dose images or automated bolus tracking software. This timing optimization ensures maximum vessel opacification while minimizing venous contamination. Proper bolus timing is crucial for diagnostic quality CTA studies, particularly in patients with altered circulation or cardiac output.
Usage
Usage note: Specify the method used (test bolus vs. automated tracking) in technical reports.
In Context
- "Bolus timing was performed to optimize arterial phase imaging in this patient with heart failure." — CTA protocol documentation
- "The automated bolus timing detected peak enhancement at 18 seconds post-injection." — Technical imaging report