Analytic torsion, a spectral invariant derived from the zeta functions of Laplace‐type operators, has become a fundamental tool in modern differential geometry. It offers refined insights into the ...

Objectives The analytical description of the geometric sensitivity of a pinhole has been extensively described in literature. However, there is a penumbra region that is often neglected because this ...

Objectives To develop a new geometric calibration method for the cone-beam CT imaging geometry for artifacts-free image reconstruction. Methods The new geometric calibration method is applicable to ...