Method and device for generating a three-dimensional image data record of a moving object by means of X-ray tomography

A method of generating a three-dimensional image data record of a moving object, comprising:

• acquiring a number of two-dimensional raw images of the moving object by an X-ray tomograph;
• grouping the two-dimensional raw images relative to a cyclical relative time;
• generating at least two preliminary 3D image data records based on such raw images corresponding to each other relative to the grouping;
• determining at least one movement matrix based on the at least two preliminary 3D image data records, a first of the at least two preliminary 3D image data records serving as a source data record and a second of the at least two preliminary 3D image data records serving as a target data record;
• determining at least one movement-compensated 3D image data record by calculating a transformation of the target data record, the transformation including mathematically operating the movement matrix upon the target data record, the movement-compensated 3D image data record corresponding to a reference time of the source data record;
• and
• adding the movement-compensated 3D image data record to at least one further movement-compensated 3D image data record or to a further preliminary 3D image data record corresponding to the reference time.

A device for generating a three-dimensional image data record of a moving object, comprising:

• an X-ray emitter/detector unit configured to be rotated about an isocentric axis of the X-ray emitter/detector unit for generating two-dimensional raw images of the moving object;
• and
• an evaluation unit for generating a three-dimensional image data record of the moving object based on the raw images, the evaluation unit configured to:
• group the raw images according to a cyclical relative time;
• generate at least two preliminary 3D image data records based on such raw images corresponding to each other relative to the grouping;
• determine at least one movement-compensated 3D image data record by calculating a transformation of the target data record, the transformation including mathematically operating the movement matrix upon the target data record, the movement-compensated 3D image data record corresponding to a reference time of the source data record;
• and
• add the movement-compensated 3D image data record to at least one further movement-compensated 3D image data record or to a further preliminary 3D image data record corresponding to the reference time.