TY  - JOUR
AU  - Rietsch, Stefan H G
AU  - Orzada, Stephan
AU  - Maderwald, Stefan
AU  - Brunheim, Sascha
AU  - Philips, Bart W J
AU  - Scheenen, Tom W J
AU  - Ladd, Mark
AU  - Quick, Harald H
TI  - 7T ultra-high field body MR imaging with an 8-channel transmit/32-channel receive radiofrequency coil array.
JO  - Medical physics
VL  - 45
IS  - 7
SN  - 2473-4209
CY  - College Park, Md.
PB  - AAPM
M1  - DKFZ-2018-02344
SP  - 2978 - 2990
PY  - 2018
AB  - 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
LB  - PUB:(DE-HGF)16
C6  - pmid:29679498
DO  - DOI:10.1002/mp.12931
UR  - https://inrepo02.dkfz.de/record/142114
ER  -