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Current virtual reality (VR) training simulators of liver punctures oftenrely on static 3D patient data and use an unrealistic (sinusoidal) periodicanimation of the respiratory movement. Existing methods for the animation ofbreathing motion support simple mathematical or patient-specific, estimatedbreathing models. However with personalized breathing models for each newpatient, a heavily dose relevant or expensive 4D data acquisition is mandatoryfor keyframe-based motion modeling. Given the reference 4D data, first a modelbuilding stage using linear regression motion field modeling takes place. Thenthe methodology shown here allows the transfer of existing referencerespiratory motion models of a 4D reference patient to a new static 3D patient.This goal is achieved by using non-linear inter-patient registration to warpone personalized 4D motion field model to new 3D patient data. This cost- anddose-saving new method is shown here visually in a qualitative proof-of-conceptstudy.

Interpatient Respiratory Motion Model Transfer for Virtual Reality Simulations of Liver Punctures