Ct - image reconstruction for a better time resolution, in the power of only - ct

摘要

The present invention relates to a process for the reconstruction of image data (i_partial) a moving object to be examined from measured data (y_meas), wherein the measurement data (y_meas) in the case of a relative rotational movement between a radiation source of a computer tomography system and the object to be examined were detected. A first image (i_{prior art}) of the object to be examined is made of a for an image reconstruction complete measuring data record (y_full) the measurement data (y_meas) is calculated, and a second image (i⁰_partial) of the object to be examined is made of a for an image reconstruction incomplete measuring data record (y_partial) the measurement data (y_meas) calculated. There is a frequency splitting of the first (i_{prior art}) and of the second (i⁰_partial) Image in each case in at least one low frequency and a higher-frequency component, and the image data of the second image (i⁰_partial) in the low-frequency portion in order to image data of the low frequency component of the first image (i_{prior art}) supplements (mix). In a further machining step (min), the thus supplemented second image (i^0a_partial) with the use of the first image (i_{prior art}) improved, since on the incompleteness of of the measuring data set (y_partial) the second image (i⁰_partial) error due to be reduced.