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Abstract #1610

Improved Reconstruction of Free-Breathing Abdominal PROPELLER MRI: A Preliminary Study

Dallas C Turley 1 , Michael Schr 2 , and James G Pipe 1

1 Neuroimaging Research, Barrow Neurological Institute, Phoenix, AZ, United States, 2 Philips Healthcare, Cleveland, OH, United States

Abdominal MRI presents many imaging challenges due to non rigid-body motion of respiration. Continuous data acquisition during free breathing is fastest and most comfortable for patients but respiratory motion must be corrected in order to obtain high quality images. In a T2-weighted free-breathing PROPELLER exam, instructing patients to pause 2-3 seconds after exhalation improved image sharpness without adding substantial patient discomfort. Respiratory motion was captured with bellows and the waveform was used as additional data to weight PROPELLER reconstruction in favor of blades collected during end-exhalation, reducing the effects of respiratory motion.

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