A theoretical analysis of errors in GRAPPA
Huang F, Duensing G
GRAPPA has been widely used as a prominent partially parallel imaging (PPI) technique. To understand GRAPPA better and hence further improve its performance, the error sources of GRAPPA are analyzed in this work. The relationship of the performance of GRAPPA to coil geometry, the choice of auto-calibrated signal (ACS) lines, blocks for reconstruction are all discussed based on the analysis of error sources. The discussion can be used to guide the design of coil and reconstruction algorithm. Linear coil distribution was used as an example to confirm some claims.