Abstract #3950

Evaluating Universal and Fast Online Customized Pulses for parallel transmission using two different RF coils

Jürgen Herrler¹, Sydney Nicole Williams², Patrick Liebig³, Shajan Gunamony^4,5, Christian Meixner⁶, Andreas Maier⁷, Arnd Dörfler¹, David Porter², and Armin Michael Nagel⁶

¹Institue of Neuroradiology, University Hospital Erlangen, Erlangen, Germany, ²Imaging Centre of Excellence, University of Glasgow, Glasgow, Scotland, ³SIEMENS Healthineers, Erlangen, Germany, ⁴Institute of Neuroscience & Psychology, University of Glasgow, Glasgow, Scotland, ⁵MR CoilTech Limited, Glasgow, Scotland, ⁶Institue of Radiology, University Hospital Erlangen, Erlangen, Germany, ⁷Friedrich Alexander University Erlangen Nürnberg, Erlangen, Germany

To investigate the universality of using pre-optimized parallel-transmit (pTx) pulses with different RF coils for routine imaging, Universal Pulses and Fast Online Customized Pulses were generated using eight respective datasets from both a commercial and a self-built 8Tx/32Rx coil. The pTx pulse types were designed for both excitation and inversion pulses in a 3D MPRAGE sequence. For each coil, one subject was examined with all combinations of pTx pulses. All pTx pulses outperform CP pulses on the coil they were trained on. When using a different coil, Universal Pulses may fail, especially for inversion, whereas FOCUS pulses achieve robust homogeneity.

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