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Developing a Cardiac Gating System for Magnetic Resonance Imaging of a mouse
Chaiyapoj NetsiriRice University, Houston, TX
Khokiat KengskoolFlorida International University, Miami, FL
Agenda
• Background
• Gating System
• Hardware
• Conclusion
Background
Animal MRI scanner Imaging probe
~250mm
Heart rate: 325-780 beat/minuteRespiratory rate: 94-163 breath/minute
Mouse’s organ imagingMouse’s organ imaging
Mouse
Kidney Liver
Problem: fast movement
~100 times averaging
Gating system
ECG cableRespiratorysensor
Results
Liver
Kidney
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.