Angiographic Examination Method for a Vascular System

摘要

An angiographic examination method for depicting a target region as an examination object using an angiography system includes capturing a volume data set of the target region with the examination object, registering the volume data set to a C-arm, and extracting information about an assumed course of the examination object in the volume data set. The method also includes generating a 2D projection image of a medical instrument in the target region, 2D/3D merging the 2D projection image and the registered volume data set for generating a 2D overlay image, and detecting the instrument in the 2D overlay image with a first projection matrix. The method includes generating a virtual 2D projection using a virtual projection matrix, 3D reconstructing the instrument, and distorting at least part of the reference image such that the current and the assumed course of vessels are made to be congruent.

主权项

1. An angiographic examination method for depicting a target region inside a patient with a vascular system as an examination object using an angiography system comprising an X-ray emitter and an X-ray image detector that are attached to ends of a C-arm, a patient positioning couch with a tabletop on which the patient is positioned, a system control unit, an image system, and a monitor, the angiographic examination method comprising:
capturing a volume data set of the target region with the examination object; registering the volume data set to the C-arm; extracting information about an assumed course of the examination object in the volume data set inside the target region; generating at least one two-dimensional (2D) projection image of a medical instrument inserted in the target region; generating a 2D overlay image, the generating of the 2D overlay image comprising 2D/3D merging of the at least one 2D projection image and of the registered volume data set; detecting the medical instrument inserted in the target region in the 2D overlay image with a first projection matrix; generating a virtual 2D projection using a virtual projection matrix; three-dimensional (3D) reconstructing the medical instrument, in which a 3D position of the medical instrument is determined from the at least one 2D projection image and the virtual 2D projection; and overlaying the at least one 2D projection image and the virtual 2D projection, and distorting at least a part of the at least one 2D projection image such that a current course and the assumed course of the vessels are congruent.