スペクトルS/N比をもちいた検出能による総合画像評価の理論

抄録

First, under accepted Gaussian distribution of noise, and additional signal to noise, the signal detection theory using the ideal detector is discussed in the spatial area by means of the deploying probability matrix theory. Second, the signal detectivity in the spatial frequency area which is able to be deal with the integration value of square of the spectral signal-to-noise ratio is explained. The ideal detector of the spatial area, having the same movements of the matched filter of spatial frequency area is discovered. As stated above, since the signal detection theory can be explained by the filter theory, it is easy to apply the signal detection theory to not only the evaluating radiographic imaging system but also the real detector, generating noise can be analyzed. Finally, the reason that the detectivity is increased by emphasizing the gradient and spectra of images is proven.