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Abstract #4904

Accelerated Stack-of-Spirals Breath-hold UTE Lung Imaging

John P. Mugler, III1, Craig H Meyer2, Josef Pfeuffer3, Alto Stemmer3, and Berthold Kiefer3

1Radiology & Medical Imaging, University of Virginia, Charlottesville, VA, United States, 2Biomedical Engineering, University of Virginia, Charlottesville, VA, United States, 3Application Development, Siemens Healthcare, Erlangen, Germany

Stack-of-spirals and cones trajectories have been proposed to permit breath-hold ultrashort-echo-time (UTE) acquisitions of the human lung, although further acceleration would be valuable to permit improvements such as shorter breath-holds for respiratory comprised patients or higher spatial resolution. In this work, an accelerated UTE 3D stack-of-spirals pulse sequence was implemented using undersampled, dual-density spiral waveforms for acquisition and a SPIRiT-based algorithm for image reconstruction. Preliminary testing in healthy volunteers using 2-fold acceleration provided image quality comparable to that achieved with the original, unaccelerated pulse sequence.

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