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Peripheral nerve stimulation characteristics of an asymmetric head-only gradient coil compatible with a high-channel-count receiver array
| Content Provider | Scilit |
|---|---|
| Author | 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, Matt A. Huston, John Shu, Yunhong Schenck, John F. |
| Copyright Year | 2015 |
| Description | Journal: Magnetic Resonance in Medicine 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. 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. 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. 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. © 2015 International Society for Magnetic Resonance in Medicine. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4889567/pdf |
| Ending Page | 1950 |
| Page Count | 12 |
| Starting Page | 1939 |
| e-ISSN | 15222594 |
| DOI | 10.1002/mrm.26044 |
| Journal | Magnetic Resonance in Medicine |
| Issue Number | 6 |
| Volume Number | 76 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2015-12-02 |
| Access Restriction | Open |
| Subject Keyword | Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Head-only Gradient Coil Peripheral Nerve Stimulation |
| Content Type | Text |
| Resource Type | Article |
