Barber D C, Brown B H
Sheffield University and Health Authority, Department of Medical Physics and Clinical Engineering, Royal Hallamshire Hospital, UK.
Clin Phys Physiol Meas. 1988;9 Suppl A:101-4. doi: 10.1088/0143-0815/9/4a/017.
Reconstruction of electrical impedance images using the filtered back projection method of Barber and Brown makes several important assumptions about the object being imaged. These are principally that the object has a circular boundary, is two-dimensional and of impedance close to uniform, and has electrodes equally spaced on its boundary. In practice few of these assumptions are met, yet the method appears to give sensible and useful images. This paper looks at errors of reconstruction produced by non-ideal placement of the electrodes and shows that the reconstruction method is insensitive to such placement errors.
使用巴伯和布朗的滤波反投影法重建电阻抗图像时，对被成像物体做了几个重要假设。主要假设是物体具有圆形边界、是二维的且阻抗接近均匀，并且在其边界上电极等距分布。实际上，这些假设很少能满足，但该方法似乎能给出合理且有用的图像。本文研究了电极非理想放置所产生的重建误差，并表明重建方法对这种放置误差不敏感。
