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. 2017 Aug 29;7:9808. doi: 10.1038/s41598-017-09622-2

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Comparison of SNR between the ¹⁹ F-CRP and ¹⁹ F/¹ H RT-coil. (A) Cross-sectional spin-echo ¹⁹F MR images of a TFE phantom acquired with the RT RF coil (left) and the CRP (right). The CRP showed a spatially varying sensitivity that is typical for transceive surface coils. (B) Plots of the SNR profile along the vertical axis at the center of the phantom. For the RT volume resonator (red curve) the SNR was very uniform within the phantom. In contrast, for the CRP the SNR drops rapidly with increasing distance to the RF coil. For this particular reference pulse power, SNR reached its maximum at 2.4 mm from the CRP surface, where it is 15-fold higher than the SNR of the RT coil. Beyond a distance of 8.1 mm the ¹⁹ F-CRP did not provide any SNR gain with regard to the ¹⁹ F/¹ H RT-coil.