Comparison of Particle Image Velocimetry and Phase Contrast MRI in a Patient-Specific Extracardiac Total Cavopulmonary Connection

Author:

Kitajima Hiroumi D.1,Sundareswaran Kartik S.1,Teisseyre Thomas Z.1,Astary Garrett W.1,Parks W. James2,Skrinjar Oskar3,Oshinski John N.4,Yoganathan Ajit P.5

Affiliation:

1. Cardiovascular Fluid Mechanics Laboratory, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, U. A. Whitaker Building, 313 Ferst Drive, Atlanta, GA 30332-0535

2. Children’s Healthcare of Atlanta, Emory University School of Medicine, 1440 Clifton Road North East, Atlanta, GA 30322

3. Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0535

4. Emory University School of Medicine, 1440 Clifton Road North East, Atlanta, GA 30322

5. Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, U. A. Whitaker Building, 313 Ferst Drive, Atlanta, GA 30332-0535; Emory University School of Medicine, 1440 Clifton Road North East, Atlanta, GA 30322

Abstract

Particle image velocimetry (PIV) and phase contrast magnetic resonance imaging (PC-MRI) have not been compared in complex biofluid environments. Such analysis is particularly useful to investigate flow structures in the correction of single ventricle congenital heart defects, where fluid dynamic efficiency is essential. A stereolithographic replica of an extracardiac total cavopulmonary connection (TCPC) is studied using PIV and PC-MRI in a steady flow loop. Volumetric two-component PIV is compared to volumetric three-component PC-MRI at various flow conditions. Similar flow structures are observed in both PIV and PC-MRI, where smooth flow dominates the extracardiac TCPC, and superior vena cava flow is preferential to the right pulmonary artery, while inferior vena cava flow is preferential to the left pulmonary artery. Where three-component velocity is available in PC-MRI studies, some helical flow in the extracardiac TCPC is observed. Vessel cross sections provide an effective means of validation for both experiments, and velocity magnitudes are of the same order. The results highlight similarities to validate flow in a complex patient-specific extracardiac TCPC. Additional information obtained by velocity in three components further describes the complexity of the flow in anatomic structures.

Publisher

ASME International

Subject

Physiology (medical),Biomedical Engineering

Reference55 articles.

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