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Flow-gated radial phase-contrast imaging in the presence of weak flow

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Abstract

To implement a flow-gating method to acquire phase-contrast (PC) images of carotid arteries without use of an electrocardiography (ECG) signal to synchronize the acquisition of imaging data with pulsatile arterial flow. The flow-gating method was realized through radial scanning and sophisticated post-processing methods including downsampling, complex difference, and correlation analysis to improve the evaluation of flow-gating times in radial phase-contrast scans. Quantitatively comparable results (R = 0.92–0.96, n = 9) of flow-related parameters, including mean velocity, mean flow rate, and flow volume, with conventional ECG-gated imaging demonstrated that the proposed method is highly feasible. The radial flow-gating PC imaging method is applicable in carotid arteries. The proposed flow-gating method can potentially avoid the setting up of ECG-related equipment for brain imaging. This technique has potential use in patients with arrhythmia or weak ECG signals.

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Acknowledgments

Supported in part by the National Science Council under grants NSC 100-2628-E-011 and NSC 100-2911-I-007-501.

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Correspondence to Teng-Yi Huang.

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Peng, HH., Huang, TY., Wang, FN. et al. Flow-gated radial phase-contrast imaging in the presence of weak flow. Int J Cardiovasc Imaging 29, 131–140 (2013). https://doi.org/10.1007/s10554-012-0056-y

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  • DOI: https://doi.org/10.1007/s10554-012-0056-y

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