Evaluating the impact of x‐ray spectral shape on image quality in flat‐panel CT breast imaging

摘要: In recent years, there has been an increasing interest in exploring the feasibility of dedicated computed tomography (CT) breast imaging using a flat-panel digital detector truncated cone-beam geometry. Preliminary results are promising and it appears as if three-dimensional tomographic great potential for reducing masking effect superimposed parenchymal structure typically observed with conventional mammography. this study, mathematical framework used determining optimal design acquisition parameters such CT system is described. The ideal observer signal-to-noise ratio (SNR) figure merit, under assumptions that linear shift invariant. Computation SNR parallel-cascade model to predict signal noise propagation through detector, well realistic lesion detection task imaging. For all evaluations, total mean glandular dose study was constrained be approximately equivalent two-view mammography study. presented explore x-ray spectral shape across extensive range kVp settings, filter material types, thicknesses. give indication how can affect image quality