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Evaluation of ECG gating for selective intraarterial carotid DSA
W D Foley1, E O Lipchik, P A Larson
1Department of Radiology, Medical College of Wisconsin, Milwaukee 53226.
Insights
ECG-gated and nongated acquisitions for carotid arteriography showed similar plaque misregistration and image quality. This suggests neither method offers a significant advantage for visualizing carotid artery bifurcations.
Area of Science:
- Radiology
- Medical Imaging
- Cardiovascular Imaging
Background:
- Selective carotid digital subtraction arteriography is crucial for diagnosing carotid artery disease.
- ECG-gating is a technique that synchronizes image acquisition with the cardiac cycle.
- Assessing the impact of ECG-gating on plaque visualization in carotid arteries is important for diagnostic accuracy.
Purpose of the Study:
- To compare the frequency of plaque misregistration between ECG-gated and nongated acquisitions in selective carotid digital subtraction arteriography.
- To evaluate the image quality of ECG-gated versus nongated studies for carotid artery imaging.
Main Methods:
- A study was conducted on 116 carotid artery bifurcations in 63 patients.
- Both ECG-gated (with exposures in systole, early diastole, and late diastole) and nongated acquisitions were performed.
- Plaque misregistration and overall image quality were assessed.
Main Results:
- No significant difference in plaque misregistration frequency was observed between gated (18%) and nongated (23%) acquisitions.
- Within gated studies, plaque misregistration was consistent across systole, early diastole, and late diastole.
- Image quality was equivalent for both gated and nongated selective carotid digital subtraction angiographic studies.
Conclusions:
- ECG-gating does not significantly reduce plaque misregistration in selective carotid digital subtraction arteriography.
- Both gated and nongated techniques provide comparable image quality for this specific application.
- The routine use of ECG-gating may not offer substantial benefits for plaque visualization in carotid arteriography.
Abstract:
A study comparing ECG-gated and nongated acquisition for selective carotid digital subtraction arteriography was performed on 116 bifurcations in 63 patients. For ECG acquisition, three exposures (systole, early diastole, and late diastole) were obtained for each cardiac cycle. There was no significant difference in the frequency of plaque misregistration between gated (18%) and nongated (23%) acquisitions. In gated studies, the frequency of plaque misregistration was equivalent in systole, early diastole, and late diastole. Gated and nongated studies provided equivalent image quality for selective carotid digital subtraction angiographic studies.