Journal Article

DKFZ-2022-01939

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png An 8-channel transceiver 7-channel receive RF coil setup for high SNR ultrahigh-field MRI of the shoulder at 7T.

Rietsch, S. H. G. ; Pfaffenrot, V. ; Bitz, A. K. ; Orzada, S. ; Brunheim, S. ; Lazik-Palm, A. ; Theysohn, J. M. ; Ladd, M. E.DKFZ* ; Quick, H. H. ; Kraff, O.

2017
AAPM College Park, Md.

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Please use a persistent id in citations: doi:10.1002/mp.12612

Abstract: In this work, we present an 8-channel transceiver (Tx/Rx) 7-channel receive (Rx) radiofrequency (RF) coil setup for 7 T ultrahigh-field MR imaging of the shoulder.A C-shaped 8-channel Tx/Rx coil was combined with an anatomically close-fitting 7-channel Rx-only coil. The safety and performance parameters of this coil setup were evaluated on the bench and in phantom experiments. The 7 T MR imaging performance of the shoulder RF coil setup was evaluated in in vivo measurements using a 3D DESS, a 2D PD-weighted TSE sequence, and safety supervision based on virtual observation points.Distinct SNR gain and acceleration capabilities provided by the additional 7-channel Rx-only coil were demonstrated in phantom and in vivo measurements. The power efficiency indicated good performance of each channel and a maximum B1+ of 19 μT if the hardware RF power limits of the MR system were exploited. MR imaging of the shoulder was demonstrated with clinically excellent image quality and submillimeter spatial resolution.The presented 8-channel transceiver 7-channel receive RF coil setup was successfully applied for in vivo 7 T MRI of the shoulder providing a clear SNR gain vs the transceiver array without the additional receive array. Homogeneous images across the shoulder region were obtained using 8-channel subject-specific phase-only RF shimming.

Keyword(s): Humans (MeSH) ; Magnetic Resonance Imaging: instrumentation (MeSH) ; Phantoms, Imaging (MeSH) ; Radio Waves (MeSH) ; Shoulder: diagnostic imaging (MeSH) ; Signal-To-Noise Ratio (MeSH) ; 7 Tesla (7T) ; RF antenna array ; radio frequency (RF) ; shoulder ; ultrahigh-field MRI

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Contributing Institute(s):

1. E020 Med. Physik in der Radiologie (E020)

Research Program(s):

1. 315 - Imaging and radiooncology (POF3-315) (POF3-315)

Appears in the scientific report 2017

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Clinical Medicine ; Current Contents - Life Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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