1. Developing a Cardiac Gating System for Magnetic Resonance Imaging of a mouse Chaiyapoj Netsiri Rice University, Houston, TX Khokiat Kengskool Florida International University, Miami, FL

2. Agenda Background Gating System Hardware Conclusion

3. Background Animal MRI scannerImaging probe

4. ~250mm Heart rate: 325-780 beat/minute Respiratory rate: 94-163 breath/minute Mouse’s organ imaging Mouse Kidney Liver Problem: fast movement ~100 times averaging

9. Gating system ECG cable Respiratory sensor

10. Results Liver Kidney

11. Conclusion Water-filled balloon and pressure sensor can be used in respiratory gating. Electronic system is inexpensive and easy to build. Double shield system can effectively protect ECG signal from MRI scanning noise. Gating system provides significant improvement of image quality.