Recessed elliptical-centric view-ordering for contrast-enhanced 3D MR angiography of the carotid arteries
1Department of Radiology, Weill Medical College of Cornell University, New York, New York 10021, USA. riw2004@med.cornell.edu
Insights
Accurate timing is crucial for carotid artery imaging. A new recessed view-ordering technique improves robustness to timing errors, enhancing image quality for arterial-venous transit studies.
Area of Science:
- Radiology
- Medical Imaging
- Cardiovascular Imaging
Background:
- Fast arterial-venous transit in carotid arteries necessitates precise timing for optimal signal.
- Conventional elliptical-centric view-ordering misses the bolus rising edge, limiting arterial enhancement.
- Venous artifacts are a challenge in dynamic contrast-enhanced imaging.
Purpose of the Study:
- To introduce and evaluate a recessed elliptical-centric view-ordering scheme.
- To improve the robustness of dynamic imaging timing in carotid arteries.
- To maximize arterial signal and minimize venous artifacts in contrast-enhanced MRI.
Main Methods:
- Development of a recessed elliptical-centric view-ordering sequence.
- Acquisition of the k-space center a few seconds after scan initiation.
- Evaluation of the scheme's robustness to timing errors in 37 patients.
Main Results:
- The recessed elliptical-centric view-ordering scheme demonstrates improved robustness to timing errors.
- This method allows for better utilization of the contrast bolus kinetics.
- Enhanced arterial signal and reduced venous artifacts are observed.
Conclusions:
- Recessed elliptical-centric view-ordering is a more reliable technique for carotid artery imaging.
- This advanced imaging technique offers improved diagnostic accuracy.
- It provides a more robust solution for dynamic contrast-enhanced MRI of the carotids.
Abstract:
Fast arterial-venous transit in the carotid arteries requires accurate, reliable timing of the acquisition to the bolus transit to maximize arterial signal and minimize venous artifacts. The rising edge of the bolus is not utilized in conventional elliptical-centric view-ordering because the critical k-space center must be acquired with full arterial enhancement. In this study, a recessed elliptical-centric view-ordering scheme is introduced in which the k-space center is acquired a few seconds following scan initiation. The recessed view-ordering is shown to be more robust to timing errors than the conventional scheme in a study of 37 patients.
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