Inter-observer agreement for the scores was moderate to very good (kappa 0.57–0.84) for all structures. Gating signals from the fetal heart were detected with a variability of 26 ± 22 ms and a sensitivity of trigger detection of 96 ± 4%.
Left ventricular (LV) volumetry was performed using the single-plane ellipsoid model. Image quality was assessed by measuring endocardial blurring (EB) and by image evaluation using a 4-point scale. Gating signals during data acquisition were analyzed with respect to trigger variability and sensitivity.
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Gated dynamic balanced steady-state free precession images were acquired in 4-chamber and short-axis cardiac views. A newly developed CMR-compatible DUS device was used to generate gating signals from fetal cardiac motion. Methodsįifteen fetuses (gestational age 30–39 weeks) were examined using 1.5 T CMR scanners at three different imaging sites. The aim of this study was to investigate the effectiveness of a newly developed Doppler ultrasound (DUS) device in humans for fetal CMR gating. However, dynamic fetal CMR is difficult due to the lack of direct in-utero cardiac gating. Fetal cardiovascular magnetic resonance (CMR) imaging may provide a valuable adjunct to fetal echocardiography in the evaluation of congenital cardiovascular pathologies.
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