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Abstract #0501

An Optically Detunable Coil for Improved Self Gating in Small Animals

Matthias Korn1, Reiner Umathum1, Jessica Schulz1,2, Axel Joachim Krafft1, Wolfhard Semmler1, Michael Bock1

1Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany; 2Siemens Healthcare, Erlangen, Germany

Physiological motion correction using MR-signals (self gating) has become a widely used method. However in small animal MRI the acquisition of motion dependent signals can be challenging. In this work a hardware-device, consisting of an inductively coupled coil that can be dynamically detuned by an optical trigger signal, is presented. Only during acquisition of the gating signal the coil is tuned and therefore enhances the gating signal while the over all image remains homogeneous. Experiments on mice are shown where the self gating signal was amplified by a factor of 1.7 to 2.8.