基于改进光线投射算法的乳腺MRI图像三维可视化研究  

Magnetic Resonance Tumor Image Segmentation Method Based on Multimodal Hierarchical Fusion

作　　者：陈蓉 高瞻[1] 邵叶秦 许昌炎 Rong Chen;Zhan Gao;Yeqin Shao;Changyan Xu(School of Information Science and Technology,Nantong University,Nantong Jiangsu 226001,China;School of Transportation and Civil Engineering,Nantong University,Nantong Jiangsu 226001,China)

机构地区：[1]南通大学信息科学技术学院,江苏南通226001 [2]南通大学交通与土木工程学院,江苏南通226001

出　　处：《生物工程前沿（中英文版）》2022年第1期8-16,共9页Biotechnology Frontier

基　　金：国家自然科学基金项目(61671255)。

摘　　要：针对磁共振图像体绘制速度慢、绘制效果不佳等问题,提出一种改进的光线投射算法,用于对磁共振成像(MRI)下的乳腺以及病灶进行三维可视化。首先,利用线性最小均方误差(LMMSE)滤波器对乳腺磁共振图像进行降噪;然后,采用双线性插值运算和光线提前终止技术对光线投射算法进行改进以提高体绘制的算法;最后,利用VTK库实现乳腺MRI图像的三维可视化。实验结果表明:提出的方法能在保证图像质量的同时提高乳腺MRI图像的绘制速度,辅助医生直观地了解乳腺内部的情况。Aiming at the problems of sensor noise and slow volume rendering in magnetic resonance images,an improved ray-casting algorithm is proposed to visualize the breast and lesion in Magnetic Resonance Imaging(MRI).First,a linear minimum mean square error(LMMSE)filter is used to denoise the breast magnetic resonance images.Then,in order to improve the algorithm of volume rendering,the ray casting algorithm is improved by using bilinear interpolation operation and ray early termination technology.Finally,the three-dimensional visualization of the breast MRI images is realized based on VTK library.Experiments show that the proposed method can improve the rendering speed of breast MRI images while ensuring image quality,and assist doctors to understand the internal situation of the breast and the condition of the lesions intuitively.

关 键 词：磁共振成像 体绘制 线性最小均方误 双线性插值运算 光线提前终止 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]