Lei Hou Hamilton1, Benjamin Russell Hamilton1,
David Moratal2, Senthil Ramamurthy3, Marijn Brummer3
1School of Electrical and Computer
Engineering, Georgia Institute of Technology,
PINOT
(Parallel Imaging and NOquist in Tandem), a fast imaging method combining
SPACE-RIP and Noquist, favorably preserves edge detail at a cost of increased
SNR. PINOT involves a large matrix inversion for each read-out coordinate to
combine data from all frames and coils. We use iterative conjugate gradient
(CG) to reduce this computational burden. An initial estimate based on the
projection matrixs structure allows CG-PINOT to converge quickly. We
simulate this CG-initiated PINOT (CGi-PINOT) with phantom and in vivo
studies, showing it provides better reconstructed image quality with an order
of magnitude less time than direct inversion PINOT.
Keywords