Wang Hongkai, Bai Jing, Zhou Yongxin, Zhang Yonghong
Medical Imaging Lab, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China.
Comput Med Imaging Graph. 2008 Sep;32(6):442-51. doi: 10.1016/j.compmedimag.2008.04.004. Epub 2008 Jun 5.
In this paper, a normalized abdominal coordinate system is defined for abdominal atlas mapping in CT and MR volume images. This coordinate system is independent of both the abdomen size and the respiratory motion. A real-time atlas mapping algorithm based on this coordinate system is also proposed. The purpose of this algorithm is to provide initial positions for abdominal organ segmentation. This algorithm reckons in the respiration phase and the fat amount to compensate organ translations. With this algorithm, rough positions of the target organs are found rapidly, and accurate segmentation results are obtained based on the mapping results.
本文定义了一种归一化腹部坐标系，用于CT和MR体图像中的腹部图谱映射。该坐标系与腹部大小和呼吸运动均无关。还提出了一种基于该坐标系的实时图谱映射算法。该算法的目的是为腹部器官分割提供初始位置。该算法考虑了呼吸阶段和脂肪量以补偿器官平移。通过该算法，可以快速找到目标器官的粗略位置，并根据映射结果获得准确的分割结果。
