Patent ID: 6714668
Filing Date: 2004-03-30
Classification: G06T

Abstract:
A method of automatic registration of two- and three-dimensional angiography images by comparison of a two-dimensional digital subtracted angiography image with data on a three-dimensional image reconstructed from rotational angiography sequences, in which a field of distortions in at least one of the two-dimensional image and the three-dimensional image is estimated, a conical projection matrix is estimated and an approximation is made of a rigid transformation in space equal to the difference between an initial registration based on the field of distortions and on the conical projection matrix and a perfect registration, the rigid transformation comprising a translation part and a rotation part, an approximation is made of the translation part by considering the rotation part as known, the optimal transformation being attained when the correlation of the digital subtracted angiography image and the reconstructed three-dimensional image data is at a maximum.