基于SEMAR技术在CT检查中去除金属假体伪影临床应用价值的研究

发布时间：2018-05-16 09:47

本文选题：体层摄影术 + X线计算机　；参考：《临床放射学杂志》2017年07期

【摘要】：目的探讨320排CT基于SX能量金属伪影减除(SEMAR)技术去金属伪影在髋关节、膝关节置换术后检查中的临床应用价值。方法行髋关节置换术患者30例,膝关节置换术10例,于术后行320排CT检查,原始数据分别行常规重建及应用SEMAR技术重建两组图像。由3名放射科高年资医生对两组图像质量进行主观目测评分,测量放射状伪影长度以评价其伪影程度,并测量假体周围噪声值,对所获得数据采用SPSS 18.0进行配对t检验或Wilcoxon秩检验进行比较,并分析其临床价值。结果使用SEMAR技术所得图像的质量评分、金属伪影的长度及假体周围噪声值均优于不使用SEMAR技术,差异均有统计学意义,P值均0.05;使用SEMAR技术单侧和双侧金属假体去伪影效果差别不大(P=0.083),差异无统计学意义;使用SEMAR技术骨计算方法去金属伪影效果优于软组织计算方法,P值0.05,差异有统计学意义。结论 320排CT基于SEMAR技术能显著减少髋关节、膝关节的金属伪影,使含金属植入物的受检部位CT图像质量明显提高,具有较好的临床应用价值。
[Abstract]:Objective to investigate the clinical application value of SX energy metal artifact subtraction technique (SEMAR) on 320 slice CT in the examination of hip and knee arthroplasty. Methods Thirty patients with hip arthroplasty and 10 patients with knee arthroplasty were examined by 320-slice CT. The original data were reconstructed by routine reconstruction and SEMAR technique respectively. The image quality of the two groups was evaluated by 3 senior radiologists. The length of the radial artifact was measured to evaluate the degree of artifacts, and the noise around the prosthesis was measured. The data obtained were compared by SPSS 18.0 paired t test or Wilcoxon rank test, and its clinical value was analyzed. Results the quality score of image obtained by SEMAR technique, the length of metal artifact and the noise value around prosthesis were better than those without SEMAR technique. The difference was statistically significant (P = 0.05), and there was no significant difference in the effect of removing artifact between unilateral and bilateral metal prostheses using SEMAR technique, but the difference was not statistically significant. The effect of removing metal artifact using SEMAR technique was better than that of soft tissue calculation method (P = 0.05), the difference was statistically significant. Conclusion 320-slice CT based on SEMAR technique can significantly reduce the metal artifacts of hip and knee joint, and improve the quality of CT images of the tested sites with metal implants, which has good clinical application value.
【作者单位】：中日友好医院放射诊断科;
【分类号】：R687.4;R816.8

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