Details

Autor(en) / Beteiligte

• May, Markus W
• Hansen, Sam-Luca J D
• Mahmutovic, Mirsad
• Scholz, Alina
• Kutscha, Nicolas
• Guerin, Bastien
• Stockmann, Jason P
• Barry, Robert L
• Kazemivalipour, Ehsan
• Gumbrecht, Rene
• Kimmlingen, Ralph
• Adriany, Markus
• Chang, Yulin
• Triantafyllou, Christina
• Knake, Susanne
• Wald, Lawrence L
• Keil, Boris

Titel

A patient-friendly 16-channel transmit/64-channel receive coil array for combined head-neck MRI at 7 Tesla

Ist Teil von

• Magnetic resonance in medicine, 2022-09, Vol.88 (3), p.1419-1433

Ort / Verlag

United States: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• To extend the coverage of brain coil arrays to the neck and cervical-spine region to enable combined head and neck imaging at 7 Tesla (T) ultra-high field MRI. The coil array structures of a 64-channel receive coil and a 16-channel transmit coil were merged into one anatomically shaped close-fitting housing. Transmit characteristics were evaluated in a B -field mapping study and an electromagnetic model. Receive SNR and the encoding capability for accelerated imaging were evaluated and compared with a commercially available 7 T brain array coil. The performance of the head-neck array coil was demonstrated in human volunteers using high-resolution accelerated imaging. In the brain, the SNR matches the commercially available 32-channel brain array and showed improvements in accelerated imaging capabilities. More importantly, the constructed coil array improved the SNR in the face area, neck area, and cervical spine by a factor of 1.5, 3.4, and 5.2, respectively, in regions not covered by 32-channel brain arrays at 7 T. The interelement coupling of the 16-channel transmit coil ranged from -14 to -44 dB (mean = -19 dB, adjacent elements <-18 dB). The parallel 16-channel transmit coil greatly facilitates B field shaping required for large FOV neuroimaging at 7 T. This new head-neck array coil is the first demonstration of a device of this nature used for combined full-brain, head-neck, and cervical-spine imaging at 7 T. The array coil is well suited to provide large FOV images, which potentially improves ultrahigh field neuroimaging applications for clinical settings.