Method and medical imaging system for compensating for patient motion

摘要

The present invention relates to a method to compensate for patient motion in series recordings in medical imaging, in which a plurality of images of an examination area of a patient ( 17 ) are recorded at time intervals with an imaging system ( 1 ) and related to each other. The invention also relates to an imaging system ( 1 ) for implementing the method. With the method, before the start of the series recordings a 3D image data set is recorded by a 3D recording of the examination area, which establishes a reference system. A first spatial position of the examination area in the reference system is then either obtained by recording a first image of the series recordings and registering it with the 3D image data set or by calculating it from a known calibration of the imaging system ( 1 ). Each further image of the series recordings is registered immediately after recording with the 3D image data set, to obtain the current spatial position of the examination area in the reference system. Finally a difference in respect of the first spatial position is determined and at least some of the difference is compensated for at least approximately by changing geometric relationships of the imaging system ( 1 ) in temporal proximity to registration. The method allows patient motion to be compensated for without interaction by the user of the imaging system.