Spatial co-registration is fusion of 3D geometries originating from different mapping modalities. Typical example may be CT derived surface of LA and it’s electroanatomical map – fused in order to have better idea about pulmonary veins anatomy. But the fusion may be also useful in answering research questions, for example how scar on LGE-MRI is related with bipolar voltage. EPLab Works application has a co-registration tool for this purpose. 

Process starts with creation of two 3D geometries of the chamber:

In the next step, three pairs of corresponding points are introduced on both geometries:

Algorithm then minimizes the distance between pairs of points, following this process with refinement aiming to minimize the distance between both goemetries: