Peripheral nerve stimulation characteristics of an asymmetric head-only gradient coil compatible with a high-channel-count receiver array

Seung Kyun Lee, Jean Baptiste Mathieu, Dominic Graziani, Joseph Piel, Eric Budesheim, Eric Fiveland, Christopher J. Hardy, Ek Tsoon Tan, Bruce Amm, Thomas K F Foo, Matthew A Bernstein, John III Huston, Yunhong Shu, John F. Schenck

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Purpose: To characterize peripheral nerve stimulation (PNS) of an asymmetric head-only gradient coil that is compatible with a commercial high–channel-count receive-only array. Methods: Two prototypes of an asymmetric head-only gradient coil set with a 42-cm inner diameter were constructed for brain imaging at 3T with maximum performance specifications of up to 85 mT/m and 708 T/m/s. Tests were performed in 24 volunteers to measure PNS thresholds with the transverse (x = left–right; y = anterior–posterior [A/P]) gradient coils of both prototypes. Fourteen of these 24 volunteers were also tested for the z-gradient PNS in the second prototype and were scanned with high–slew-rate echo planar imaging (EPI) immediately after the PNS tests. Results: For both prototypes, the y-gradient PNS threshold was markedly higher than the x-gradient threshold. The z-gradient threshold was intermediate between those for the x- and y-coils. Of the 24 volunteers, only two experienced y-gradient PNS at 80 mT/m and 500 T/m/s. All volunteers underwent the EPI scan without PNS when the readout direction was set to A/P. Conclusion: Measured PNS characteristics of asymmetric head-only gradient coil prototypes indicate that such coils, especially in the A/P direction, can be used for fast EPI readout in high-performance neuroimaging scans with substantially reduced PNS concerns compared with conventional whole body gradient coils. Magn Reson Med 76:1939–1950, 2016.

Original languageEnglish (US)
Pages (from-to)1939-1950
Number of pages12
JournalMagnetic Resonance in Medicine
Volume76
Issue number6
DOIs
StatePublished - Dec 1 2016

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Peripheral Nerves
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Echo-Planar Imaging
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Neuroimaging

Keywords

  • EPI
  • head-only gradient coil
  • neuroimaging
  • peripheral nerve stimulation
  • PNS

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Peripheral nerve stimulation characteristics of an asymmetric head-only gradient coil compatible with a high-channel-count receiver array. / Lee, Seung Kyun; Mathieu, Jean Baptiste; Graziani, Dominic; Piel, Joseph; Budesheim, Eric; Fiveland, Eric; Hardy, Christopher J.; Tan, Ek Tsoon; Amm, Bruce; Foo, Thomas K F; Bernstein, Matthew A; Huston, John III; Shu, Yunhong; Schenck, John F.

In: Magnetic Resonance in Medicine, Vol. 76, No. 6, 01.12.2016, p. 1939-1950.

Research output: Contribution to journalArticle

Lee, SK, Mathieu, JB, Graziani, D, Piel, J, Budesheim, E, Fiveland, E, Hardy, CJ, Tan, ET, Amm, B, Foo, TKF, Bernstein, MA, Huston, JIII, Shu, Y & Schenck, JF 2016, 'Peripheral nerve stimulation characteristics of an asymmetric head-only gradient coil compatible with a high-channel-count receiver array', Magnetic Resonance in Medicine, vol. 76, no. 6, pp. 1939-1950. https://doi.org/10.1002/mrm.26044
Lee, Seung Kyun ; Mathieu, Jean Baptiste ; Graziani, Dominic ; Piel, Joseph ; Budesheim, Eric ; Fiveland, Eric ; Hardy, Christopher J. ; Tan, Ek Tsoon ; Amm, Bruce ; Foo, Thomas K F ; Bernstein, Matthew A ; Huston, John III ; Shu, Yunhong ; Schenck, John F. / Peripheral nerve stimulation characteristics of an asymmetric head-only gradient coil compatible with a high-channel-count receiver array. In: Magnetic Resonance in Medicine. 2016 ; Vol. 76, No. 6. pp. 1939-1950.
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