By the comprehensive analysis of existing mcasuring methods

a new method is proposed in the paper tomeasure 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 renovation based on noncomplete proection are proposed to reconstruct dase field much more accurately. The filter function is also an important factor in the image reconstruction. The Butterworth filter function is chasen. By adjusting its parameters

we have obtained optimum result. Finally

all the experimentationshow that the methods proposed in paper are proper and whole measuring system is advanced and feasible.