Mott D J, Zheng G L, Eddleston B
Br J Radiol. 1985 Sep;58(693):873-80. doi: 10.1259/0007-1285-58-693-873.
Brain images produced on the EMI 7070 scanner exhibit a "cupping" artefact due to a combination of beam hardening and scatter effects. The magnitude of the artefact is assessed by statistically analysing a series of concentric regions of interest in the final image. Once the magnitude has been determined it can be subtracted from the image. While the result of the technique does not modify the clinical analysis of images it does increase the observer's appreciation of the image. Both the technique and clinical results are presented, and the implications of this type of reconstruction artefact removal discussed.
由EMI 7070扫描仪生成的脑部图像由于束硬化和散射效应的综合作用而呈现出“杯状”伪影。通过对最终图像中一系列同心感兴趣区域进行统计分析来评估伪影的大小。一旦确定了大小，就可以从图像中减去它。虽然该技术的结果不会改变图像的临床分析，但它确实会增强观察者对图像的理解。本文展示了该技术和临床结果，并讨论了这种类型的重建伪影去除的意义。
