Demons deformable registration for CBCT‐guided procedures in the head and neck: Convergence and accuracy

Purpose: The accuracy and convergence behavior of a variant of the Demons deformable registration algorithm were investigated for use in cone‐beam CT (CBCT)‐guided procedures of the head and neck. Online use of deformable registration for guidance of therapeutic procedures such as image‐guided surgery or radiation therapy places trade‐offs on accuracy and computational expense. This work describes a convergence criterion for Demons registration...