Abstract #2779

A PIN-Diode-Controlled Double-Tuned Birdcage Coil for 1H-Imaging and 31P-Spectroscopy on Mice

Maximilian N. Voelker¹, Alexander M. Koenig¹, Steve Braun¹, Andreas H. Mahnken¹, Johannes T. Heverhagen²

¹Diagnostic Radiology, Philipps University, Marburg, Hessen, Germany; ²University Institute of Diagnostic, Interventional and Pediatric Radiology, Inselspital, Bern University Hospital, Bern, Switzerland

A PIN-diode switched Birdcage coil for MRI on mice at 7T had been developed. PIN-diodes are used directly on the end rings of a high pass birdcage to add a second/parallel capacitor line to a 1H-tuned Birdcage coil. Therefore the resonance frequency can be changed between proton and phosphor frequencies. The intended usage is proton imaging and spectroscopy with phosphor spectroscopy as an Add-on. The coil is easy to match and tune and shows superior SNR to a 4-Ring-BC of similar size in proton imaging, but lower SNR on phosphor resonance mode.