Journal article

Performance Analysis for Magnetic Resonance Imaging With Nonlinear Encoding Fields

Kelvin J Layton, Mark Morelande, Peter M Farrell, Bill Moran, Leigh A Johnston

IEEE TRANSACTIONS ON MEDICAL IMAGING | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 2012

Abstract

Nonlinear spatial encoding fields for magnetic resonance imaging (MRI) hold great promise to improve on the linear gradient approaches by, for example, enabling reduced imaging times. Imaging schemes that employ general nonlinear encoding fields are difficult to analyze using traditional measures. In particular, the resolution is spatially varying, characterized by a position-dependent point spread function (PSF). Likewise, the use of nonlinear encoding fields creates an additional spatial dependence on the signal-to-noise ratio (SNR). Although the two properties of resolution and SNR are linked, in this work we focus on the latter. To this end, we examine the pixel variance, which requires ..

View full abstract

Grants

Funding Acknowledgements

Manuscript received July 03, 2011; revised September 16, 2011; accepted September 16, 2011. Date of publication September 29, 2011; date of current version February 03, 2012. This work was supported by NICTA Lifesciences, Victorian Research Laboratory. NICTA is funded by the Australian Government as represented by the Department of Broadband, Communications and the Digital Economy and the Australian Research Council through the ICT Centre of Excellence program. Asterisk indicates corresponding author.