双源CT双能量线性融合重建去除腰椎固定物金属伪影的初步研究

Preliminary Study of Utilizing Dual Source CT Dual Energy Linear Fusion Technology to Eliminate Lumbar Metal Implants Artifacts

目的探讨双源CT双能量扫描线性融合技术对消除腰椎金属植入物伪影的临床应用价值。方法对33例腰椎金属植入术后复查的患者使用双源CT双能量扫描,对获得的80 k V及140 k V数据进行线性融合成像,所得图像为A组,模拟常规120 k V重建为B组,分别进行多平面重建技术、容积显示和最大密度投影,并对重建后图像质量及伪影进行评估。结果线性融合像质量为优者分别为90%和33%;无伪影图像分别占91%和36%,两者差异有统计学意义(分别为Z=-5.74,P=0.00;Z=-6.74,P=0.00)。结论双源CT双能量线性融合技术能够非常准确有效的去除金属伪影,清晰显示腰椎金属内固定物的位置、形态及其他细微结构,双侧腰大肌不受伪影干扰显示清楚,图像质量较高,可满足诊断要求。

Objective To explore the clinical application value of the dual source CT dual energy scanning linear fusion technology for eliminating lumbar metal implants artifacts.Methods33patients that were going to check after lumbar metal implants were selected for our research.The dual source CT dual energy scanning with the voltages were separately80kV and140kV was used to gain the imaging data for linear fusion,which we marked as group A.The regular120kV imaging data was simulated,which we marked as group B.Multiple planar reconstruction,volume reality,maximum intensity projection,reconstruction image quality and the artifacts were evaluated.Results The images with high quality under linear fusion were90%and33%,respectively.The images with no artifact in group A and B accounted for91%and36%,respectively.The difference between group A(Z=5.74,P=0.00)and group B(Z=6.74,P=0.00)was statistically significant.Conclusion It was very accurate and effective for the dual source CT dual energy scanning linear fusion technology to eliminate lumbar metal implants artifacts.It could clearly show the location shape,and other microscopic structures of the lumbar metal fixture.In addition,it could clearly show right and left psoas muscles without artifacts interference.Therefore,the dual source CT dual energy scanning linear fusion technology can obtain high quality images and meet the diagnostic requirements.