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Abstract #4908

Reduced Specific Energy Deposition with Diagnostic Image Quality in Pediatric Population using CArdioREspiratory Synchronized (CARESync) Balanced Steady-State Free Precession Cine Imaging

Amol S. Pednekar1, Siddharth Jadhav1, Ivone Rodriguez1, Connor Ho1, Cory Noel2, and Prakash Masand1

1Radiology, Texas Children's Hospital, Houston, TX, United States, 2Cardiology, Texas Children's Hospital, Houston, TX, United States

Cine-bSSFP cardiac imaging in sedated pediatric population faces two-fold challenges: 1) respiratory motion; and 2) cardiocirculatory impairment associated compromised thermoregulatory response. Prospective 63 sedated patients’ study shows that CAdioREspiratory Synchronized sequence, with prospective arrhythmia rejection and retrospective cardiac gating, reduced specific absorbed energy per slice in fixed (18.96±5.16 J/kg) by 49.36% and adaptive (24.13±9.55 J/kg) by 39.24% modes, than equivalent 4NSA sequence while maintaining spatial, temporal, and contrast resolutions possible with breath-holds, providing consistently good image quality with 21.13% increased scan time (26.38±8.15 s) per slice. Adaptive mode reduced scan time by 18% than fixed mode for favorable cardiorespiratory rates.

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