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Magn Reson Med. 2019 Aug;82(2):825-832. doi: 10.1002/mrm.27736. Epub 2019 Mar 21.

An 8-channel receive array for improved 31 P MRSI of the whole brain at 3T.

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Department of Radiology and Nuclear Medicine, Radboud university medical center, Nijmegen, The Netherlands.
Department of Geriatric Medicine, Radboud university medical center, Nijmegen, The Netherlands.
Radboudumc Alzheimer Center, Donders Institute for Brain, Cognition and Behaviour, Radboud university medical center, Nijmegen, The Netherlands.
Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, United Kingdom.
Erwin L. Hahn Institute, University Hospital Duisburg-Essen, Essen, Germany.



To demonstrate a 1 H/31 P whole human brain volume coil configuration for 3 Tesla with separate 31 P transmit and receive components that maintains 1 H MRS performance and delivers optimal 31 P MRSI with 1 H decoupling.


We developed an 8-channel 31 P receive array coil covering the head to be used as an insert for a commercial double-tuned 1 H/31 P birdcage transmit-receive coil. This retains the possibility of using low-power rectangular pulses for 1 H-decoupled 3D 31 P MRSI (nominal resolution 17.6 cm3 ; acquisition duration 13 min) but increases the SNR with the receive sensitivity of 31 P surface coils. The performance of the combined coil setup was evaluated by measuring 1 H and 31 P SNR with and without the 31 P receive array and by assessing the effect of the receive array on the transmit efficiencies of the birdcage coil.


Compared to the birdcage coil alone, the 31 P insert in combination with the birdcage achieved an average 31 P SNR gain of 1.4 ± 0.4 in a center partition of the brain. The insert did not cause losses in 1 H MRS performance and transmit efficiency, whereas for 31 P approximately 20% more power was needed to achieve the same γB1.


The new coil configuration allows 1 H MRSI and optimal 1 H-decoupled 3D 31 P MRSI, with increased SNR of the human brain without patient repositioning, for clinical and research purposes at 3 Tesla.


1H-decoupling; 3 Tesla; 31P MR spectroscopic imaging; RF array coil; brain

[Available on 2019-08-01]

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