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| Item Type: | Article |
|---|---|
| Title: | 16-channel bow tie antenna transceiver array for cardiac MR at 7.0 Tesla |
| Creators Name: | Oezerdem, C., Winter, L., Graessl, A., Paul, K., Els, A., Weinberger, O., Rieger, J., Kuehne, A., Dieringer, M., Hezel, F., Voit, D., Frahm, J. and Niendorf, T. |
| Abstract: | 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 lambda/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 x 0.8 x 2.5) mm3 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. |
| Keywords: | Ultrahigh Field MRI, Cardiovascular MRI, Electrical Dipole, Transceiver Array, RF Coil, Parallel Imaging |
| Source: | Magnetic Resonance in Medicine |
| ISSN: | 0740-3194 |
| Publisher: | Wiley-Blackwell |
| Volume: | 75 |
| Number: | 6 |
| Page Range: | 2553-2565 |
| Date: | June 2016 |
| Official Publication: | https://doi.org/10.1002/mrm.25840 |
| PubMed: | View item in PubMed |
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