摘要
X-CT成像系统中,当被检测物体中含有金属等高密度物质时,对投影数据重建后,重建图像中将出现放射状伪影或带状伪影。这些伪影严重影响了图像的质量,给人们的判断带来极大困难。金属伪影的校正已成为CT技术中的研究难点和热点。本文阐述了金属伪影产生的原因,就近些年出现的金属伪影校正方法进行归纳总结,并对金属伪影校正方法研究的前景进行讨论。
In the system of CT imaging,for the objects with high density metal,CT images reconstructed by the standard filtered-back-projection（FBP） algorithm generate significant streak artifacts. These artifacts seriously influence image quality and bring huge difficulties for judgment. Correction method of metal artifacts has become the hot and difficult issue of CT technique. The paper formulates the cause of metal artifacts,and sums up the correction methods of metal artifacts developed this year,at last,discusses the investigative foreground of correction methods of metal artifacts.
出处
《CT理论与应用研究（中英文）》
2011年第1期131-140,共10页
Computerized Tomography Theory and Applications
基金
国家高技术研究发展计划"863计划"(2009AA012201)
河南省基础与前沿技术研究计划项目(072300450240)
关键词
计算机断层成像
金属伪影
插值法
迭代法
CT
metal artifacts
interpolation methods
iterative reconstruction methods
