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Updated: Jun 17, 2026

Phase Contrast Magnetic Resonance Imaging in the Rat Common Carotid Artery
Published on: September 5, 2018
Agreement between ventricular stroke volumes and great vessel flow using cine and phase-contrast MRI in healthy
Ai Kawaguchi1, Wataru Kawaguchi2, Miyuki Hayashi2
1Department of Radiology, TOYOTA Memorial Hospital, Toyota, Aichi, Japan. hanamaru0918@gmail.com.
Abstract:
Indirect quantification of valvular regurgitation using cardiovascular magnetic resonance assumes agreement among left ventricular stroke volume (LV-SV), right ventricular stroke volume (RV-SV), and forward flow in the ascending aorta (Ao) and pulmonary artery (PA). This study evaluated agreement among these parameters in healthy subjects. In 15 healthy volunteers, LV-SV and RV-SV were calculated from LV short-axis cine images, and Ao and PA flows were measured using phase-contrast MRI. Agreement among six parameter pairs was assessed using Bland-Altman analysis and intraclass correlation coefficients (ICC). Bland-Altman analysis demonstrated negative additive bias in RV-PA, RV-Ao, and RV-LV comparisons, indicating underestimation of RV-SV. Complementary ICC analysis showed moderate agreement in all RV-related pairs. Indirect regurgitant volume estimation based on LV-Ao appears robust, whereas RV-PA may underestimate regurgitant volume when RV-SV is derived from LV short-axis cine imaging.
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