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Experimental Validation of a Multi-Square Slot Surface Coil for UHF MRI at 11.7 T

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Abstract

A multi-square slot surface coil was developed for rodent MRI at 11.7 T. The coil prototype was 20 mm in diameter with six square slots. Electromagnetic simulations of the slotted and circular coils were conducted to evaluate the signal-to-noise ratio (SNR) and absorption rate (SAR). Experimental SNR results were also calculated and compared, and the comparison showed good agreement between experimental and numerical data. The slotted coil produces lower predicted SAR for points near the coil plane when compared to the SAR numerical values for the circular coil. The performance of prototype, measured via the Q factor, was \(Q_l 6.5 = Q_u\), and its noise figure was 1.6. A commercial circular coil was used to acquire phantom images for comparison purposes. The slotted surface coil showed comparable performance with a commercial circular coil in UHF MRI applications. These experimental and numerical results demonstrate the feasibility of the slotted coil design at 11.7 T.

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Acknowledgements

The anonymous reviewers valuable comments should be much appreciated. We would like to thank CONACYT Mexico (grant number 112092) and PAPIIT-UNAM (grant number IT 102116).

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Authors and Affiliations

  1. Departamento de Fisica, Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, 04510, Mexico City, Mexico

    S. Solis-Najera, F. Vazquez, R. Martin & L. Medina

  2. Department of Neuroimaging, National Institute of Neurology and Neurosurgery MVS, 14269, Mexico City, Mexico

    O. Marrufo

  3. Department of Electrical Engineering, Universidad Autonoma Metropolitana Iztapalapa, 09340, Mexico City, Mexico

    A. O. Rodriguez

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  1. S. Solis-Najera
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  2. F. Vazquez
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  3. R. Martin
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  4. O. Marrufo
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  5. L. Medina
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  6. A. O. Rodriguez
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Correspondence to A. O. Rodriguez.

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Solis-Najera, S., Vazquez, F., Martin, R. et al. Experimental Validation of a Multi-Square Slot Surface Coil for UHF MRI at 11.7 T. Appl Magn Reson 51, 749–757 (2020). https://doi.org/10.1007/s00723-020-01217-x

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  • DOI: https://doi.org/10.1007/s00723-020-01217-x

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