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| Item Type: | Article |
|---|---|
| Title: | Modular 32-channel transceiver coil array for cardiac MRI at 7.0T |
| Creators Name: | Graessl, A., Renz, W., Hezel, F., Dieringer, M.A., Winter, L., Oezerdem, C., Rieger, J., Kellman, P., Santoro, D., Lindel, T.D., Frauenrath, T., Pfeiffer, H. and Niendorf, T. |
| Abstract: | Purpose: To design and evaluate a modular transceiver coil array with 32 independent channels for cardiac MRI at 7.0T. Methods: The modular coil array comprises eight independent building blocks, each containing four transceiver loop elements. Numerical simulations were used for B1+ field homogenization and radiofrequency (RF) safety validation. RF characteristics were examined in a phantom study. The array's suitability for accelerated high spatial resolution two-dimensional (2D) FLASH CINE imaging of the heart was examined in a volunteer study. Results: Transmission field adjustments and RF characteristics were found to be suitable for the volunteer study. The signal-to-noise intrinsic to 7.0T together with the coil performance afforded a spatial resolution of 1.1 × 1.1 × 2.5 mm3 for 2D CINE FLASH MRI, which is by a factor of 6 superior to standardized CINE protocols used in clinical practice at 1.5T. The 32-channel transceiver array supports one-dimensional acceleration factors of up to R = 4 without impairing image quality significantly. Conclusion: The modular 32-channel transceiver cardiac 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 7.0T. |
| Keywords: | Ultrahigh-Field MRI, Cardiovascular MRI, Transceiver Array, Parallel Imaging |
| Source: | Magnetic Resonance in Medicine |
| ISSN: | 0740-3194 |
| Publisher: | Wiley-Blackwell |
| Volume: | 72 |
| Number: | 1 |
| Page Range: | 276-290 |
| Date: | July 2014 |
| Official Publication: | https://doi.org/10.1002/mrm.24903 |
| PubMed: | View item in PubMed |
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