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.