Method and system for pericardium based model fusion of pre-operative and intra-operative image data for cardiac interventions

摘要

A method and system for model based fusion pre-operative image data, such as computed tomography (CT), and intra-operative C-arm CT is disclosed. A first pericardium model is segmented in the pre-operative image data and a second pericardium model is segmented in a C-arm CT volume. A deformation field is estimated between the first pericardium model and the second pericardium model. A model of a target cardiac structure, such as a heart chamber model or an aorta model, extracted from the pre-operative image data is fused with the C-arm CT volume based on the estimated deformation field between the first pericardium model and the second pericardium model. An intelligent weighted average may be used improve the model based fusion results using models of the target cardiac structure extracted from pre-operative image data of patients other than a current patient.

主权项

1. A method for fusion of a model of a target cardiac structure extracted from a first medical image of a patient acquired using a first imaging modality with a second medical image of the patient acquired using a second imaging modality, comprising:
segmenting a first pericardium model in the first medical image; segmenting a second pericardium model in the second medical image; estimating a deformation field between the first pericardium model and the second pericardium model; and fusing the model of the target cardiac structure extracted from the first medical image with the second medical image based on the estimated deformation field between the first pericardium model and the second pericardium model, wherein the target cardiac structure is a cardiac structure other than the pericardium and the pericardium is used as anchor structure to fuse the target cardiac structure to the second medical image.