基于双目红外相机定位的自由式三维超声图像重建系统-《中国医学物理学杂志》

文章信息/Info

Title:: Freehand three-dimensional ultrasound image reconstruction system based on binocular infrared camera positioning

Author(s):: CHEN Zeyu; GE Yun; CHEN Ying; HUANG Xiaolin; LI Weifeng; School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China

摘要:: 目的：设计并实现自由式三维超声图像重建系统，该系统能对自由式采集的二维超声图像阵列进行三维重建与显示交互。方法：系统使用双目红外相机及其配套测量器件，在超声探头上固定定位小球，双目红外相机可以实时追踪探头的空间位置，从而获取超声图像阵列的相对关系。软件部分根据实时探头位置并计算转换矩阵，获取超声图像阵列的数据并填充三维体数据网格，使用光线投射法绘制图像。结果：该系统可以实现超声图像阵列的采集与存储、超声图像感兴趣区域勾画、三维重建与可视化功能。结论：该研究提出的基于双目红外相机定位的自由式三维超声图像重建系统对未来的临床使用以及科学研究奠定了良好基础。

Abstract:: Abstract: Objective To design and implement a freehand three-dimensional (3D) ultrasound image reconstruction system which can perform 3D reconstruction and display interaction on the two-dimensional ultrasound image array acquired by freehand method. Methods The system uses a binocular infrared camera and its matching measurement tools. By fixing positioning balls on the ultrasound probe, the binocular infrared camera could track the spatial position of the probe in real time so as to obtain the relative relationship of the ultrasound image array. Besides, the transformation matrix was calculated by software based on the real-time probe position, and then the 3D volume grid was filled based on the data of the ultrasound image array. Finally, the 3D image was obtained using ray casting algorithm. Results The system realized the acquisition and storage of ultrasound image array, the delineation of the region of interest on the ultrasound image as well as 3D reconstruction and visualization. Conclusion The freehand three-dimensional ultrasound image reconstruction system based on binocular infrared camera positioning proposed in the study lays a good foundation for future clinical application and scientific research.