Abstract #4347

Prototype Hardware of FPGA Controlled Multi-Channel All-Digital RF Transmitter for Parallel Magnetic Resonance Imaging

Filiz Ece Filci¹, Aylin Dogan¹, Gokhan Cansiz¹, Bulent Sen¹, Volkan Acikel¹, and Ergin Atalar^2,3

¹Aselsan Inc., Ankara, Turkey, ²Electrical-Electronics Engineering Department, Ihsan Dogramaci Bilkent University, Ankara, Turkey, ³National Magnetic Resonance Center, Ihsan Dogramaci Bilkent University, Ankara, Turkey

In this study, prototype hardware of FPGA Controlled Multi-Channel All-Digital Transmitter for Parallel Magnetic Resonance Imaging is presented. The transmitter system consists of a RF power amplifier and a digital signal generator to feed each channels and a user interface computer to control the signal type, amplitude, phase, and frequency of targeted pulse. Digital signal generator uses a novel method which is IQ Pre-Modulation Delta Sigma Modulation Based Digital Single Side Band modulator and enables frequency, phase, and amplitude modulation schemes. The prototype hardware is produced to feed a 12-channel RF-coil, thus RFPA module consists of 12-PA are implemented.

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