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Abstract #1291

Quiescent-Inflow Single-Shot (QISS) Magnetic Resonance Angiography Using a Highly Undersampled Radial K-Space Trajectory

Robert R. Edelman1, Shivraman Giri2, Eugene Dunkle3, Mauricio Galizia3, Parag Amin3, Ioannis Koktzoglou3

1Radiology, NorthShore University HealthSystem, Evanston, IL, United States; 2Siemens Healthcare, Chicago, IL, United States; 3NorthShore University HealthSsytem, Evanston, IL, United States

We hypothesized that high undersampling factors could be used in conjunction with radial Quiescent-Inflow Single-Shot (QISS) MRA in order to accelerate data collection and enable multi-slice and body coil acquisitions. Three healthy subjects and four patients with PAD were imaged on a 1.5T MRI system. Comparing Cartesian QISS (93 lines) with single slice radial QISS (92 views), the respective image quality scores were 2.6 0.4 and 2.9 0.2 (p = 0.04). We have demonstrated the feasibility of radial QISS MRA with much higher undersampling factors than are achievable using a Cartesian k-space trajectory and standard parallel imaging techniques.

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Keywords

accelerate achievable acquisition acquisitions adaptive angiography approved array arterial arteries artifact board body coil coils collection combination comparing compensate concurrent conjunction consent coverage described deviation diagnostic diagram dual eight element enable entire especially feasibility fold foot gated greatly head healthy highly horizontal hypothesized inflow informed inherent institutional intensity intra just larger length loss matrix middle minutes much noise normalized parallel patients peripheral pixel previously projections protocol quality quiescent radial radiology receiver reception reduces remained resolution respective review saturation scores shot slice slices space squares station streak striping subject subjects suppression system trajectory triple view views written