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Abstract #4609

Association of Several Motion Sensors for Free Breathing Reconstruction Method

Laure Rousselet1,2, Slavisa Jovanovic1,2, Malne Lohezic2,3, Marina Filipovic1,2, Cdric Pasquier4,5, Jacques Felblinger1,2

1IADI, Nancy-Universit, Nancy, France; 2U947, INSERM, Nancy, France; 3Global Applied Science Lab., GE Healthcare, Nancy, France; 4CIT 801, INSERM, Nancy, France; 5CIC-IT, CHU de Nancy, Nancy, France

New MR compatible sensors based on acceleration measurements have been developed. They are associated with a microcontroller to easily adjust amplification parameters to the respiration of each volunteer. Motion information extracted from these sensors has been included in a free-breathing reconstruction technique, GRICS. It is based on a non rigid motion model linearly constrained by physiological signals, initially pneumatic respiratory belts. The combination of motion information extracted from different sources (accelerometers and pneumatic belts) improves the quality of GRICS reconstructed images. Moreover, resulting images are comparable with images acquired in breath hold.