Tim Nielsen1,
Jinnan Wang2,3, Peter Boernert1
1Philips Research Europe, Hamburg,
Germany; 2Philips Research North America, Briarcliff Manor, NY,
United States; 3University of Washington, Seattle, WA, United
States
High
resolution MR imaging of the carotids is an interesting technique for plaque
characterization but image quality can be compromised by motion artifacts.
Effects of breathing and pulsation can be reduced by gated acquisition.
Coping with non-periodic motion (e.g. swallowing) is still often challenging
in clinical practice and is considered as a major factor that contributes to
the overall 20% failure rate in clinical scans. We present a method to reduce
the effects of sudden, non-periodic motion by exploiting data redundancy
which is usually present in parallel imaging with multiple receive coils. The
method can be applied retrospectively without any navigator information.