000265651 001__ 265651
000265651 005__ 20190723162709.0
000265651 0247_ $$2doi$$a10.1002/mrm.27808
000265651 02470 $$2DOI$$a10.1002/mrm.27808
000265651 037__ $$aARTICLE
000265651 245__ $$aA combined 32‐channel receive‐loops/8‐channel transmit‐dipoles coil array for whole‐brain MR imaging at 7T
000265651 260__ $$c2019
000265651 269__ $$a2019
000265651 336__ $$aJournal Articles
000265651 520__ $$aPurpose Multichannel receive arrays provide high SNR and parallel‐imaging capabilities, while transmit‐only dipole arrays have been shown to achieve a large coverage of the whole‐brain including the cerebellum. The aim of this study was to develop and characterize the performances of a 32‐channel receive‐only loop array combined with an 8‐channel dipole coil array at 7T for the first time. Methods The 8Tx‐dipoles/32Rx‐loops coil array was characterized by the SNR, g‐factors, noise correlation matrix, accelerated image quality, and urn:x-wiley:07403194:media:mrm27808:mrm27808-math-0003 maps, and compared with a commercial 1Tx‐birdcage/32Rx‐loops array. Simulated and measured urn:x-wiley:07403194:media:mrm27808:mrm27808-math-0004 maps were shown for the 8Tx‐dipoles/32Rx‐loops coil array and compared with the 8Tx/Rx dipole array. Results The in‐house built 32‐channel receive coil demonstrated a large longitudinal coverage of the brain, particularly the upper neck area. G‐factors and accelerated MR acquisitions demonstrated robust performances up to R = 4 in 2D, and R = 8 (4 × 2) in 3D. A 83% increase in SNR was measured over the cerebellum with the in‐house built 8Tx/32Rx coil array compared to the commercial 1Tx/32Rx, while similar performances were obtained in the cerebral cortex. Conclusions The combined 32‐channel receive/8‐channel transmit coil array demonstrated high transmit‐receive performances compared to the commercial receive array at 7T, notably in the cerebellum. We conclude that in combination with parallel transmit capabilities, this coil is particularly suitable for whole‐brain MR studies at 7T.
000265651 542__ $$fCC BY-NC
000265651 6531_ $$aCIBM-AIT
000265651 700__ $$g184201$$aClément, Jérémie$$0248590
000265651 700__ $$g161735$$aGruetter, Rolf$$0243712
000265651 700__ $$g231389$$aIpek, Özlem$$0247043
000265651 773__ $$tMagnetic Resonance in Medicine$$j82$$k3$$q1229-1241
000265651 8560_ $$frolf.gruetter@epfl.ch
000265651 8564_ $$uhttps://infoscience.epfl.ch/record/265651/files/A%20combined%2032%E2%80%90channel%20receive%E2%80%90loops%20and%208%E2%80%90channel%20transmit%E2%80%90dipoles%20%20coil%20array%20for%20whole%E2%80%90brain%20MR%20imaging%20at%207T.pdf$$s3816971
000265651 8564_ $$zPREPRINT$$uhttps://infoscience.epfl.ch/record/265651/files/Supporting%20Figure%20S1.pdf$$s889209
000265651 8564_ $$uhttps://infoscience.epfl.ch/record/265651/files/Clement_23loop8dipole_MRM_2019.pdf$$zFinal$$s3817198
000265651 909C0 $$zPasquier, Simon$$xU12623$$pCIBM$$mrolf.gruetter@epfl.ch$$0252477
000265651 909C0 $$zPasquier, Simon$$xU10984$$pLIFMET$$mrolf.gruetter@epfl.ch$$0252276
000265651 909CO $$particle$$pSB$$ooai:infoscience.epfl.ch:265651
000265651 960__ $$arolf.gruetter@epfl.ch
000265651 961__ $$apierre.devaud@epfl.ch
000265651 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000265651 980__ $$aARTICLE
000265651 981__ $$aoverwrite