Device and method, (MRI) is described during the magnetic resonant imaging examination to measure and observe the human or animal subject of cardio-cerebral respiratory system signal. This includes in video camera and MRI scan device, the transfer tool of video data is far from MRI scan device, the light source irradiates the object and an algorithm, analyzes video flowing and extracts the object of heartbeat signal and respiratory signal using the variation of small image intensity and motion information. These methods make that optical tracking is utilized to monitor and correct for heart and respiratory movement in MRI, and provide basic patient monitoring and object is not physically contacted.
