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  • Wiley  (2)
  • Song, Di  (2)
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  • 1
    In: Journal of Clinical Ultrasound, Wiley, Vol. 51, No. 6 ( 2023-07), p. 1070-1077
    Abstract: To investigate the feasibility of high‐frame‐rate vector flow imaging (HiFR‐VFI) compared to ultrasound color Doppler flow imaging (CDFI) for precisely evaluating flow characteristics in the carotid bifurcation (CB) of presumed healthy adults. Methods Forty‐three volunteers were assessed for flow characteristics and their extensions using HiFR‐VFI and CDFI in CBs. The flow patterns were classified according to the streamlines in HiFR‐VFI and quantitatively measured using an innovative turbulence index (Tur‐value). Interobserver agreement was also assessed. Results HiFR‐VFI was consistent with CDFI in detecting laminar and nonlaminar flow in 81.4% of the cases; however, in 18.6% of the cases, only HiFR‐VFI identified the nonlaminar flow. HiFR‐VFI showed a larger extension of complex flow (0.37 ± 0.26 cm 2 ) compared to CDFI (0.22 ± 0.21 cm 2 ; p   〈  0.05). The flow patterns were classified into four types: 3 type‐I (laminar flow), 35 type‐II (rotational flow), 27 type‐III (reversed flow), and 5 type‐IV (complex flow). The Tur‐value of type‐IV (50.03 ± 14.97)% is larger than type‐III (44.57 ± 8.89)%, type‐II (16.30 ± 8.16)%, and type‐I (1.48 ± 1.43)% ( p   〈  0.05). Two radiologists demonstrated almost perfect interobserver agreement on recognizing the change of streamlines (κ = 0.81, p   〈  0.001). The intraclass correlation coefficient of the Tur‐value was 0.98. Conclusion HiFR‐VFI can reliably characterize complex hemodynamics with quantitative turbulence measurement and may be an auxiliary diagnostic tool for assessing atherosclerotic arterial disease.
    Type of Medium: Online Resource
    ISSN: 0091-2751 , 1097-0096
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1492376-2
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2023
    In:  Journal of Ultrasound in Medicine Vol. 42, No. 2 ( 2023-02), p. 427-436
    In: Journal of Ultrasound in Medicine, Wiley, Vol. 42, No. 2 ( 2023-02), p. 427-436
    Abstract: To assess the feasibility and performance of Turbulence (Tur) index as a quantitative tool for carotid artery flow turbulence; to detect and compare the blood flow patterns of common carotid artery (CCA) and carotid bulb (CB) at different ages and cardiac phases in healthy adults, and thus interpret the evolvement of etiology difference between CCA and CB. Methods Carotid flow characteristics of 40 healthy volunteers were evaluated quantitatively by a high‐frame rate vector flow imaging. Three types of flow patterns were defined depending on the distributive range of complex flow during systole in CB. Comparison of mean Tur value in CCA and CB at different age groups and cardiac phases was performed. And the correlation between Tur value and the diameter ratio of proximal internal carotid artery to common carotid artery (DRpro‐ica/cca) was tested. Results Mean Tur values in CB were remarkably higher than that in CCA, whether during systole or diastole ( P   〈  .001). Meanwhile Tur values in CB during systole were significantly higher than that during diastole ( P   〈  .001). Flow complexity of CB showed variations among 40 participants especially in systole, whereas the flow pattern of CCA was relatively consistent. Mean Tur values were positively correlated with DRpro‐ica/cca in CB ( ρ  = 0.69, P   〈  .05). Conclusions V Flow imaging provided a reliable method—Tur, for quantitative analysis of carotid blood flow. It had potential to be further applied in distinguishing complex hemodynamic characteristics in high‐risk people of carotid diseases for the risk stratification of cardiovascular events.
    Type of Medium: Online Resource
    ISSN: 0278-4297 , 1550-9613
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2067124-6
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