ECG gating — types?
Prospective reduces dose; retrospective allows functional data.
ECG gating — purpose?
Synchronizes image with cardiac cycle.
Optimal heart rate — threshold?
Below 65 bpm for best image quality.
Ideal heart rate — bpm?
Below 65 bpm.
Dual-source CT — advantage?
Improves temporal resolution to ~75 ms.
Dual-source CT — advantage?
Improves temporal resolution (~75 ms).
Contrast peak — timing?
15-20 seconds after injection.
Prospective vs retrospective gating — dose?
Prospective: lower dose; retrospective: more data.
Artifacts — mitigations?
Gating, high temporal resolution, reconstruction.
Whole heart in single rotation — method?
Wide-detector CT.
Test your knowledge with 9 questions on Cardiac CT Imaging Techniques.
1. What is the primary advantage of prospective ECG gating in cardiac CT imaging?
2. What is the primary advantage of prospective ECG gating in cardiac CT imaging?
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