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        Comparison between conventional duplex ultrasonography and the dual-gate Doppler mode for hemodynamic measurements of the carotid arteries

        Jeanne Hersant,Pierre Ramondou,Delphine Douillet,Stanislas Abrard,Patrick Vandeputte,François-Xavier Lapébie,Pierre Abraham,Samir Henni 대한초음파의학회 2022 ULTRASONOGRAPHY Vol.41 No.2

        Purpose: This study investigated the correlations of hemodynamic parameters measured to quantify stenosis between the gold-standard duplex ultrasonography and the dual-gate Doppler mode.Methods: Patients examined due to suspicion of carotid artery stenosis or for surveillance of known stenosis were invited to participate in this prospective single-center study. Upon acceptance, the hemodynamic characteristics of the carotid arteries were determined successively in standard duplex and dual-gate Doppler modes. The correlations between the two modes were analyzed by computing Pearson coefficients (r<sup>2</sup>) and Lin concordance coefficients (ρ<sub>c</sub>). The degree of agreement between the two methods was visualized using Bland-Altman graphical representations.Results: The correlation between internal carotid artery peak systolic velocity measured by standard duplex ultrasonography and dual-gate Doppler mode was good (r<sup>2</sup>=0.642). The same high level of correlation was observed for the carotid ratio (r<sup>2</sup>=0.544). However, the Bland-Altman graphical representation and the Lin concordance coefficients (ρ<sub>c</sub>=0.75 and ρ<sub>c</sub>=0.74 for the internal carotid artery peak systolic velocity and carotid ratio, respectively) showed that a lack of precision generated some discrepancies between the two measurement methods.Conclusion: Although some discrepancies were observed, the hemodynamic measurements were closely correlated between the two ultrasonography modes. Therefore, the dual-gate Doppler mode may have obvious advantages over conventional ultrasonography, offering interesting development possibilities.

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