Abstract #2556

Accelerating a Spectrally-Resolved Fully Phase-Encoded (SR-FPE) Method for Metal Artifact Reduction

Nathan S. Artz¹, Alexey A. Samsonov¹, Diego Hernando², Valentina Taviani¹, Matthew R. Smith¹, Jean H. Brittain³, Scott B. Reeder¹,⁴

¹Radiology, University of Wisconsin, Madison, WI, United States; ²Radiology, University of Wisconsin-Madison, Madison, WI, United States; ³Global Applied Science Laboratory, GE Healthcare, Madison, WI, United States; ⁴Medical Physics, University of Wisconsin, Madison, WI, United States

A spectrally-resolved fully phase-encoded (SR-FPE) technique was recently introduced for imaging near metal. The primary limitation of SR-FPE is long scan time. This work first compares distortion in SR-FPE and conventional 3D-FSE, and then examines the potential for acceleration. A hip prosthesis was scanned with SR-FPE using a 16-channel coil, and data were retrospectively under-sampled to demonstrate the feasibility of parallel imaging in all three phase-encoding directions, in combination with corner-cutting and half-Fourier sampling. Highly accelerated distortion-free SR-FPE images were reconstructed using the equivalent of ~7.5minutes of scanning, compared to 4 hours of fully sampled data, demonstrating feasibility for clinical implementation.