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Abstract #2884

Reducing Specific Energy Deposition in Free Breathing Balanced Steady-State Free Precession (bSSFP) Cine Imaging using Cardio-respiratory Synchronization

Amol Pednekar1,2, Benjamin Cheong3, Janie Swaab4, Melissa Andrews3, Debra Dees3, and Raja Muthupillai2

1Philips Healthcare, Houston, TX, United States, 2Baylor St. Luke's Medical Center, Houston, TX, United States, 3Diagnostic and Interventional Radiology, Baylor St. Luke's Medical Center, Houston, TX, United States, 4Department of Diagnostic and Therapeutic Radiology, Baylor St. Luke's Medical Center, Houston, TX, United States

Free breathing cine bSSFP sequences with minimal compromises in spatio-temporal resolution requirements are highly desirable in patients who can not hold their breath, e.g., sedated patients, patients with poor cardiopulmonary reserve, patients with arrhythmia etc. The results from this prospective clinical study of 14 clinical patients shows that a cardiorespiratory synchronized (CS) sequence can reduce specific energy deposition (0.68 ± 0.24 kJ/kg) by 40% compared to a respiratory gated (RG) sequence (1.2 ± 0.36 kJ/kg) without compromising spatial, temporal, and contrast resolution thus permitting the prescription of bSSFP cine sequences with higher spatial or temporal resolution, and coverage.

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