Figure 6.

XCAT study: three‐view slice cuts of the initial prior CT volume, the “gold‐standard” new CT volume, the ADRIC‐reconstructed CT volume, the ADRIC deformation‐recovered CT volume (the final μ _comp‐DR ), and the ADRIC intensity correction besides deformation recovery. The reconstruction used 40 projections simulated with 10⁵ incident photon counts for each pixel. The display window for the initial prior CT volume, the “gold‐standard” new CT volume, the ADRIC‐reconstructed CT volume, and the ADRIC deformation‐recovered CT volume is [0.015, 0.05] mm⁻¹. The display window for the ADRIC intensity correction is [−0.015, 0.015] mm⁻¹. The dashed line was added to indicate the deformation from the initial prior image to the gold‐standard image. The boxes shown in the axial, coronal, and sagittal views of the “gold‐standard” new CT volume indicate the three ROIs used for UQI calculation and comparison. [Color figure can be viewed at wileyonlinelibrary.com]