The Study of real-time radiography system based on array absorption-emission computed tomography

By the comprehensive analysis of existing measuring methods, a new method is proposed to measure the nuclear radiation dose field with array absorption-emission computed tomography. The detector based on scintillation optical fiber array and its servo- control system are designed. The weak optical signal is measured by Charge Coupled Devices (CCD) and the formed visual signal is quickly sampled with the method of testing fixed signed points. The reconstruction method of iterative filter back projection and the data renovate based on non-complete projection are proposed to reconstruct dose field more accurately. The filter function is also an important factor in the image reconstruction. The Butter worth filter function is chosen. By adjusting its parameters, the authors have obtained optimum result. Finally, all the experimentation shows that the methods proposed are proper and whole measuring system is advanced and feasible