Wang Hongkai, Bai Jing, Zhang Yonghong
Dept. of Biomed. Eng., Tsinghua Univ., Beijing.
Conf Proc IEEE Eng Med Biol Soc. 2005;2005:3257-60. doi: 10.1109/IEMBS.2005.1617171.
Thoracic organ segmentation from the three dimensional (3D) medical images always needs an initial position. We developed a relative thoracic cage coordinate system (RTCCS) for localizing the organs in chest CT volume data. To test the RTCCS, we first extracted the 3D ribs and heart-wall from the segmented atlas of male American visible human, and then we built up a RTCCS according to the position of the ribs and calculated the relative coordinate values of all the voxels in the heart-wall. Next we segmented the 3D ribs from the female American visible human CT data and built up another RTCCS on these ribs. At last we used the relative coordinate values of the male visible human's heart-wall to reconstruct a new 3D heart-wall in the thoracic cage of the female visible human CT data, getting an approximate position of the female visible human's heart.
从三维（3D）医学图像中进行胸部器官分割总是需要一个初始位置。我们开发了一种相对胸廓坐标系（RTCCS），用于在胸部CT容积数据中定位器官。为了测试RTCCS，我们首先从美国男性可见人体的分割图谱中提取3D肋骨和心脏壁，然后根据肋骨的位置建立一个RTCCS，并计算心脏壁中所有体素的相对坐标值。接下来，我们从美国女性可见人体CT数据中分割出3D肋骨，并在这些肋骨上建立另一个RTCCS。最后，我们使用男性可见人体心脏壁的相对坐标值在女性可见人体CT数据的胸廓中重建一个新的3D心脏壁，从而得到女性可见人体心脏的近似位置。
