Anti-Aliasing Acquisition (AAA) Decreases Study Duration While Maintaining Accuracy in Cardiac MR Flow Exams

Jordin Daniel Green^1,2, David John Patton², Qing-San Xiang³

Using a conventional flow quantification sequence, the user is typically required to repeat scans to ensure that velocity sensitivity is high enough to maintain accuracy yet low enough to avoid velocity aliasing. Anti-Aliasing Acquisition (AAA) is a flow imaging technique that avoids aliasing while still maintaining high velocity sensitivity. We demonstrated in patients that one AAA scan could be used to accomplish what typically requires multiple conventional scans, reducing study duration. Comparing the AAA to the conventional technique for accuracy, we computed a Cronbachs Alpha coefficient of 0.999 for measures of mean, maximum, and minimum flow.