Fig. 3From: Cone-beam CT reconstruction for non-periodic organ motion using time-ordered chain graph modelSchematic of the digital phantom and its projection geometry. a projection geometry and the phantom containing a moving sphere, b axial and sagittal views of the original digital phantom, and c one of the virtually created projections. An air sphere with a diameter of 3 cm was moving 3 cm along the longitudinal axis during one rotation of the projection sourceBack to article page