Dept. of Electr. Eng., Tamkang Univ., Tamsui.
IEEE Trans Med Imaging. 1995;14(4):752-6. doi: 10.1109/42.476116.
Electronic imaging of complex cylindrical objects with arbitrary cross sections was investigated, assuming an incident wave upon both penetrable inhomogeneous dielectric cylinders and perfectly conducting cylinders with known shape, and external measurements of the scanned field. By properly processing the scattered held measurements, the dielectric permittivity distribution of the scanned object can be reconstructed. A theoretical formulation was based on proper arrangement of the incident field directions resulting in a set of integral equations derived and solved by the moment method and the unrelated illumination method. Numerical results demonstrate the capability of the imaging algorithm. Good reconstruction results were obtained even in the presence of additive random noise. In addition, noise effects on the reconstruction results were investigated.
研究了对任意横截面的复杂圆柱形物体的电子成像，假设在具有已知形状的可穿透非均匀介电圆柱和理想导电圆柱上存在入射波，并对扫描场进行外部测量。通过对散射场测量值进行适当处理，可以重建扫描物体的介电常数分布。理论公式基于适当排列入射场方向，得出一组积分方程，然后通过矩量法和无关照明法进行求解。数值结果证明了成像算法的能力。即使存在附加随机噪声，也能获得良好的重建结果。此外，还研究了噪声对重建结果的影响。
