Robust real-time respiratory motion tracking using ultrasound image sequences

Respiratory motion monitoring is important to deal with tumor tracking in radiotherapy and imaging. In this paper, we propose a system that measures directly the motion of organ itself only using ultrasound image. Our system locates robustly diaphragm even though diaphragm may be blurred in ultrasound images by a fitting technique. In addition, it can extract robustly respiratory signal by automatically selecting the best area to monitor respiratory area in all image sequences.