Whole-body radiofrequency coil for (31) P MRSI at 7 T

J Löring, W J M van der Kemp, S Almujayyaz, J W M van Oorschot, P R Luijten, D W J Klomp

Research output: Contribution to journalArticleAcademicpeer-review


Widespread use of ultrahigh-field (31) P MRSI in clinical studies is hindered by the limited field of view and non-uniform radiofrequency (RF) field obtained from surface transceivers. The non-uniform RF field necessitates the use of high specific absorption rate (SAR)-demanding adiabatic RF pulses, limiting the signal-to-noise ratio (SNR) per unit of time. Here, we demonstrate the feasibility of using a body-sized volume RF coil at 7 T, which enables uniform excitation and ultrafast power calibration by pick-up probes. The performance of the body coil is examined by bench tests, and phantom and in vivo measurements in a 7-T MRI scanner. The accuracy of power calibration with pick-up probes is analyzed at a clinical 3-T MR system with a close to identical (1) H body coil integrated at the MR system. Finally, we demonstrate high-quality three-dimensional (31) P MRSI of the human body at 7 T within 5 min of data acquisition that includes RF power calibration. Copyright © 2016 John Wiley & Sons, Ltd.

Original languageEnglish
Pages (from-to)709-720
Number of pages12
JournalNMR in Biomedicine
Issue number6
Publication statusPublished - Jun 2016


  • MRSI; 31P; RF coil; 7 T


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