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Abstract #4265

A novel split patch antenna and saddle coil resonant structure for EPR Imaging

Nallathamby Devasahayam1, Shun Kishimoto1, Kazutoshi Yamamoto1, Gadisetti V Chandramouli2, Murali C Krishna1, Sankaran Subramanian3, and Hellmut Merkle 1
1NCI, Bethesda, MD, United States, 2GenEpria Consulting Inc., Columbia, MD, United States, 3Indian Institute of Technology Madras, Chennai, India

Synopsis

Keywords: Non-Array RF Coils, Antennas & Waveguides, Electron Paramagnetic Resonance, Patch antenna, EPR whole body, EPR oximetry

Motivation: A patch antenna transmitter and a saddle coil resonator with optimized Q and bandwidth was used to perform EPR imaging in time-domain to cover a phantom of large volume as prelude to in vivo functional EPR imaging to open up possibilities of scaling up FT-EPR imaging to practically useful in cancer research and tissue oximetry.

Goal(s): To advance FT-EPR oximetric and functional imaging capable of studying rabbit size animals.

Approach: We used a patch antenna for transmit and saddle coil as receiver to allow uniform transmit and receive with reduced SAR.

Results: A resonant structure was built successfully to operate at 300 MHz.

Impact: This resonant structure is implemented for the first time with sufficient bandwidth and short recovery time to image signals from a large volume resonator. This design allows easy scale up for human size objects.

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