Table 4 Suggested IV contrast injection regiments
From: Imaging in Transcatheter Aortic Valve Replacement (TAVR): role of the radiologist
64-Detector scanner | 320-Detector scanner |
|---|---|
Gated cardiac CTA | Gated CTA chest |
Bolus injection, 20Â ml IV contrast | Automatic triggering |
ROI: proximal descending aorta | ROI: proximal descending aorta |
Peak enhancement selected | Threshold of +200 HU used |
Main injection: 4 ml/s, 70–80 ml | Rate: 4 ml/s, 120–140 ml |
Non-gated CTA abdomen, pelvis | Non-gated CTA abdomen, pelvis |
Additional 50Â ml is injected | Done immediately after chest CTA |
Injection timing based on bolus results | No additional IV contrast required |
Total: | Total: |
130–150 ml | 120–140 ml |