Real-time tracking of three-dimensional organ motion using ultrasound images for high-precision irradiation restricted to abdominal

作为呼吸门控放疗中测量器官运动的一种安全方法，我们研究并开发了一种器官运动的定量跟踪方法。我们提出的方法使用大量的特征点来实现长期的合适跟踪。实验结果表明，该方法可以实现对人体部分器官的长期跟踪。

As a safety method for measuring organ motion in respiratory-gated radiotherapy, we studied and developed a quantitative tracking method for organ motion. Our proposed method uses a large number of feature points to achieve a suitable tracking for a long term. The method was validated for moving phantom images and the subject images, and the result showed that our proposed method was possible to track some parts of organ for a long term.