PURPOSE: To design, evaluate, and apply a bow tie antenna transceiver radiofrequency (RF) coil array tailored for cardiac MRI at 7.0 Tesla (T). METHODS: The radiofrequency (RF) coil array comprises 16 building blocks each containing a bow tie shaped λ/2-dipole antenna. Numerical simulations were used for transmission field homogenization and RF safety validation. RF characteristics were examined in a phantom study. The array's suitability for high spatial resolution two-dimensional (2D) CINE imaging and for real time imaging of the heart was examined in a volunteer study. RESULTS: The arrays transmission fields and RF characteristics are suitable for cardiac MRI at 7.0T. The coil performance afforded a spatial resolution as good as (0.8 × 0.8 × 2.5) mm(3) for segmented 2D CINE MRI at 7.0T which is by a factor of 12 superior versus standardized protocols used in clinical practice at 1.5T. The proposed transceiver array supports 1D acceleration factors of up to R = 6 without impairing image quality significantly. CONCLUSION: The 16-channel bow tie antenna transceiver array supports accelerated and high spatial resolution cardiac MRI. The array is compatible with multichannel transmission and provides a technological basis for future clinical assessment of parallel transmission techniques at 7.0 Tesla. Magn Reson Med 75:2553-2565, 2016.
PURPOSE: To design, evaluate, and apply a bow tie antenna transceiver radiofrequency (RF) coil array tailored for cardiac MRI at 7.0 Tesla (T). METHODS: The radiofrequency (RF) coil array comprises 16 building blocks each containing a bow tie shaped λ/2-dipole antenna. Numerical simulations were used for transmission field homogenization and RF safety validation. RF characteristics were examined in a phantom study. The array's suitability for high spatial resolution two-dimensional (2D) CINE imaging and for real time imaging of the heart was examined in a volunteer study. RESULTS: The arrays transmission fields and RF characteristics are suitable for cardiac MRI at 7.0T. The coil performance afforded a spatial resolution as good as (0.8 × 0.8 × 2.5) mm(3) for segmented 2D CINE MRI at 7.0T which is by a factor of 12 superior versus standardized protocols used in clinical practice at 1.5T. The proposed transceiver array supports 1D acceleration factors of up to R = 6 without impairing image quality significantly. CONCLUSION: The 16-channel bow tie antenna transceiver array supports accelerated and high spatial resolution cardiac MRI. The array is compatible with multichannel transmission and provides a technological basis for future clinical assessment of parallel transmission techniques at 7.0 Tesla. Magn Reson Med 75:2553-2565, 2016.
Authors: Xiaoxuan He; M Arcan Ertürk; Andrea Grant; Xiaoping Wu; Russell L Lagore; Lance DelaBarre; Yiğitcan Eryaman; Gregor Adriany; Eddie J Auerbach; Pierre-François Van de Moortele; Kâmil Uğurbil; Gregory J Metzger Journal: Magn Reson Med Date: 2019-12-17 Impact factor: 4.668
Authors: M Arcan Ertürk; Xiaoping Wu; Yiğitcan Eryaman; Pierre-François Van de Moortele; Edward J Auerbach; Russell L Lagore; Lance DelaBarre; J Thomas Vaughan; Kâmil Uğurbil; Gregor Adriany; Gregory J Metzger Journal: Magn Reson Med Date: 2016-10-21 Impact factor: 4.668
Authors: Kamil Uğurbil; Pierre-Francois Van de Moortele; Andrea Grant; Edward J Auerbach; Arcan Ertürk; Russell Lagore; Jutta M Ellermann; Xiaoxuan He; Gregor Adriany; Gregory J Metzger Journal: Magn Reson Imaging Clin N Am Date: 2021-02 Impact factor: 2.266
Authors: M Arcan Ertürk; Alexander J E Raaijmakers; Gregor Adriany; Kâmil Uğurbil; Gregory J Metzger Journal: Magn Reson Med Date: 2016-02-17 Impact factor: 4.668