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Abstract #3201

Modeling of organ's motion using external sensors.

Pasquier C, Vuissoz P, Felblinger J, Abaecherli R, Odille F
Universit Henri Poincar; INSERM ERI 13, Schiller Mdical

Common MRI sequences suffer from motion limitation, particularly respiratory-induced motion. Navigators are one proposed correction method but simultaneous acquisition of navigators and images could be a limitation. External sensor may constitute a more versatile input for motion model. Combination of several external sensors are tested and the best input function proving good correlation between external sensors and organ's motion is found. After calibration it is possible to estimate the motion of an organ at any instant in the sequence. This enables the adaptation of motion prediction to different organs and different physiology.