%0 Journal Article
%A Rietsch, Stefan H G
%A Orzada, Stephan
%A Maderwald, Stefan
%A Brunheim, Sascha
%A Philips, Bart W J
%A Scheenen, Tom W J
%A Ladd, Mark
%A Quick, Harald H
%T 7T ultra-high field body MR imaging with an 8-channel transmit/32-channel receive radiofrequency coil array.
%J Medical physics
%V 45
%N 7
%@ 2473-4209
%C College Park, Md.
%I AAPM
%M DKFZ-2018-02344
%P 2978 - 2990
%D 2018
%X In this work, a combined body coil array with eight transmit/receive (Tx/Rx) meander elements and with 24 receive-only (Rx) loops (8Tx/32Rx) was developed and evaluated in comparison with an 8-channel transmit/receive body array (8Tx/Rx) based on meander elements serving as the reference standard.Systematic evaluation of the RF array was performed on a body-sized phantom. Body imaging at 7T was performed in six volunteers in the body regions pelvis, abdomen, and heart. Coil characteristics such as signal-to-noise ratio, acceleration capability, g-factors, S-parameters, noise correlation, and B1+ maps were assessed. Safety was ensured by numerical simulations using a coil model validated by dosimetric field measurements.Meander elements and loops are intrinsically well decoupled with a maximum coupling value of -20.5 dB. Safe use of the 8Tx/32Rx array could be demonstrated. High gain in signal-to-noise ratio (33
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:29679498
%R 10.1002/mp.12931
%U https://inrepo02.dkfz.de/record/142114