Methods for determining a surface geometry of an object, including
determining a first projection matrix based on a first imaging device,
determining a second projection matrix based on a second imaging device,
obtaining at least one first two-dimensional (2D) image of the object
using the first imaging device, obtaining at least one second 2D image of
the object using the second imaging device, determining a contour of the
object in the first 2D image and the second 2D image, and, based on the
at least two contours, the first projection matrix, and the second
projection matrix, reconstructing 3D data associated with the surface of
the object. In one embodiment, the object can be a heart.