Fast parallel spiral chemical shift imaging at 3T using iterative SENSE reconstruction

Dirk Mayer, Dong-Hyun Kim, Daniel M. Spielman, Roland Bammer
2008 Magnetic Resonance in Medicine  
Spiral chemical shift imaging (CSI) is a fast CSI technique that simultaneously encodes 1D spectral and 2D spatial information. Therefore, it potentially allows one to perform a 2D-CSI experiment in a single shot. However, for most applications, limitations on maximum gradient strength and slew rate make multiple excitations necessary in order to achieve a desired spectral bandwidth. In this work we reduce the number of spatial interleaves and, hence, the minimum total measurement time of
more » ... CSI by using an iterative sensitivity encoding reconstruction algorithm which utilizes complementary spatial encoding afforded by the spatially inhomogeneous sensitivity profiles of individual receiver coils. The performance of the new method was evaluated in phantom and in vivo experiments. Parallel spiral CSI produced maps of brain metabolites similar to those obtained using conventional gridding reconstruction of the fully sampled data with only a small decrease in time-normalized signal-to-noise ratio and a small increase in noise for higher acceleration factors. Magn Reson Med 59:891-897, 2008.
doi:10.1002/mrm.21572 pmid:18383298 pmcid:PMC3986023 fatcat:nfy235kuwrgzpi2jbiza37h2xa