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Abstract #4469

Adaptive Efficiency-Optimized Self Navigation (ADIOS) for Free-Breathing Non-Contrast Abdominal MRA

Yibin Xie1, 2, Zhaoyang Fan1, Yutaka Natsuaki3, Gerhard Laub4, Rola Saouaf1, Debiao Li1

1Cedars-Sinai Medical Center, Los Angeles, CA, United States; 2University of California, Los Angeles, Los Angeles, CA, United States; 3Siemens Medical Solutions, Los Angeles, CA, United States; 4Siemens Healthcare, Los Angeles, CA, United States

Non-contrast MRA based on bSSFP and slab-selective inversion is an attractive method for imaging abdominal arteries without contrast agents. However current free-breathing methods suffer from issues including complicated setup, prolonged scan and navigator saturation artifacts, limiting this technique from becoming clinical routine. An Adaptive Efficiency-Optimized Self Navigation (ADIOS) method is developed in this work utilizing motion information derived from imaging volume. Scan efficiency is maintained with an automatic thresholding algorithm. Volunteer study results show comparable image quality, simplified setup, and absence of navigator artifacts.