Method and device for automatically adapting a reference image

摘要

A method and a device for reference image adapting in the field of fluoroscopy-controlled interventional repair of abdominal aortic aneurisms on angiography systems are proposed. Displacements which can be brought about as a result of introducing instruments, such as when a stent is deployed in an aorta, are automatically corrected. It is also possible to correct such displacements which initially cannot be perceived in the image due to the angle of view.

主权项

1. A method for adapting a reference image, comprising:
extracting an assumed course of the blood vessels from the reference image; introducing an instrument into a target region which deforms the assumed course of the blood vessels; detecting a position of the introduced instrument in a fluoroscopic image; identifying a current vessel course based on the position of the introduced instrument in the fluoroscopic image; registering and overlaying the reference image with the fluoroscopic image which comprises a deformation as a result of the introduced instrument; correcting the deformation in the overlaid reference image based on the current vessel course so that the current vessel course and the assumed course of the blood vessels are consistent; and extrapolating a part of the current vessel course in which the instrument has not been introduced in the overlaid reference image based on smoothness condition, wherein the smoothness condition comprises no abrupt bends on the blood vessels.