PhD Candidate University of Oxford
Summary of the Segmentation Workflow Here’s a step-by-step view of the segmentation and geometry construction approach in the Zacur et al. context: Image Acquisition: Standard clinical cardiac MRI (cine short-axis + long-axis + scout images). Cardiac Structure Segmentation: Expert segmentation of epicardial and endocardial contours across relevant MRI slices. Contour Alignment: Rigid alignment of intersecting slices to correct misalignments due to patient motion or breath holding. Surface Mesh Reconstruction: Algorithms handle sparse, irregular contours to generate 3D surfaces representing heart chambers (ventricles). Torso Geometry Segmentation: Semi-automatic delineation (skin, lungs) from wider field MRI slices; used to define tissue boundaries for body volume conductor modeling. 3D Model Integration: The heart and torso meshes are combined into a personalized anatomical model for computational simulation of cardiac electrophysiology and ECG.