CT reconstruction by using the MLS-ART technique and the KCD imaging system - I: Low-energy X-ray studies

We investigated the use of the kinestatic charge detector (KCD) combined wi th the multilevel scheme algebraic reconstruction technique (MLS-ART) for X -ray computer tomography (CT) reconstruction. The KCD offers excellent dete ctive quantum efficiency and contrast resolution. These characteristics are especially helpful for applications in which a limited number of projectio ns are used. In addition, the MLS-ART algorithm offers better contrast reso lution than does the conventional convolution backprojection (CBP) techniqu e when the number of projections is limited. Here we present images of a Ra ndo-head phantom that was reconstructed by using the KCD and MLS-ART. We al so present, for comparison, the images reconstructed by using the CBP techn ique. The combination of MLS ART and the KCD yielded satisfactory images af ter just one or two iterations.