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Effects of inductive coupling on parallel MR image reconstructions by Michael A. Ohliger; Patrick Ledden; Charles A. McKenzie; Daniel K. Sodickson is a Medicine article available to read on EtoBox.

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## Abstract Theoretical arguments and experimental results are presented that characterize the impact of inductive coupling on the performance of parallel MRI reconstructions. A simple model of MR signal and noise reception suggests that the intrinsic amount of spatial information available from a given coil array is unchanged in the presence of inductive coupling, as long as the sample remains the dominant source of noise for the coupled array. Any loss of distinctness in the measured coil sensitivities is compensated by information stored in the measured noise correlations. Adjustments to the theory are described to account for preamplifier noise contributions. Results are presented from an experimental system in which preamplifier input impedances are systematically adjusted in order to vary the level of coupling between array elements. Parallel image reconstructions using an array with four different levels of coupling and an acceleration factor up to six show average SNR changes of −7.6% to +7.5%. The modest changes in overall SNR are accompanied by similarly small changes in g‐factor. These initial results suggest that moderate amounts of inductive coupling should not have a

Who reads Effects of inductive coupling on parallel MR image reconstructions?

Author

Michael A. Ohliger; Patrick Ledden; Charles A. McKenzie; Daniel K. Sodickson

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0740-3194)

Published

2004

Language

EN

Field

Medicine (Health Sciences)