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Abstract #3385

Impact of Frequency Drifts During PROPELLER-EPI Measurements

Martin Krmer1, Jrgen R. Reichenbach1

1Medical Physics Group, Department of Diagnostic and Interventional Radiology I, Jena University Hospital, Jena, Germany

Shifts of the resonance frequency will with an EPI readout lead to a shift of the corresponding image in phase encoding direction. With a PROPELLER-EPI sampling scheme the periodically changing phase encoding direction causes the low resolution images to be shifted in different directions, ultimately leading to a strong image blurring. In the present work we characterize the impact of frequency shifts on PROPELLER-EPI measurements while discussing different solutions for measuring and compensating occurring frequency shifts.