Association of Several Motion Sensors for Free Breathing Reconstruction Method

Laure Rousselet^1,2, Slavisa Jovanovic^1,2, Malne Lohezic^2,3, Marina Filipovic^1,2, Cdric Pasquier^4,5, Jacques Felblinger^1,2

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.