基于水平集的HIFU损伤区域三维重建技术

3D reconstruction of HIFU lesion area based on level set

目的:为超声引导的HIFU治疗系统设计自动检测凝固性坏死损伤区域的大小形状及位置的辅助诊断方法。方法:针对超声图像斑纹噪声较强、分辨率低且HIFU损伤区域无明显边界的的特点,提出一种基于双零水平集双速度的图像分割方法,以提取器官及其内部HIFU损伤区域的轮廓。利用"切片"B超图像的双轮廓线,对器官及其内部的损伤部位进行三维重建。结果:实验表明,基于水平集轮廓提取算法的三维重建的结果可直观反映HIFU损伤区域的形状,大小及其在器官内的相对位置。结论:作为自动检测HIFU凝固性坏死区域的辅助诊断方法,该方法具有可行性。

Objective To design a computer aided method in HIFU treatment system to monitor the size, shape and location of HIFU lesion automatically. Methods According to ultrasound image＇s characters of high noise, low resolution and weak edge, a double zero level set, double speed approach was proposed to extract the contour of organ and lesion area. The serial ＂lice＂ contours were used to reconstruct three dimension（3D） HIFU lesion area in the sample. Results Experiments show that level set contour extraction method based 3D reconstruction is helpful in monitoring the size, shape and location in the organ. Conclusions This method has the feasibility to be introduced as an auxiliary technique monitoring HIFU lesion area automatically.