ADAPTATION OF RECONSTRUCTION WINDOW IN COMPUTED TOMOGRAPHY WITH GATED ELECTROCARDIOGRAM Russian patent published in 2012 - IPC A61B6/00 A61B6/03 A61B5/452 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine and medical equipment, namely, to systems of image obtaining, in particular, to computed tomography. In first version of implementation system of image obtaining contains component of window management, which receives ECG signal, which contains premature cardiac cycle and preliminarily obtained X-ray projection data of beating heart. ECGF signal is synchronised with the time of preliminarily obtained X-ray projection data of beating heart. Component of window management places first reconstruction window within the limits of the first cardiac cycle to correspond desirable cardiac phase of preliminarily obtained X-ray projection data, when premature cardiac cycle ensures correspondence of the first reconstruction window to another cardiac phase. Such system contains device of reconstruction which reconstructs projection data, corresponding to multitude of windows of reconstruction of different cardiac cycles to create image data, characteristic of desirable heart phase. In second version of implementation system contains component of window management which deletes first reconstruction window corresponding to suboptimal cardiac phase of preliminarily obtained X-ray projection data of beating heart resulting from abnormal signal in ECG signal. ECG signal is presented in time with preliminarily obtained X-ray projection data of beating heart on multitude of heart cycles, and component of window management adds replacing reconstruction window to optimise set of data for reconstruction, basing on abnormal signal and available preliminarily obtained projection. System also contains reconstruction device which reconstructs set of data for reconstruction in order to create image data characteristic of desirable phase of heart beating. In third version of implementation system contains recommendation component which recommends reconstruction window for cardiac phase within the multitude of preliminarily obtained successive cardiac cycles based on ECG signal and arrhythmia in it, and device of reconstruction, which reconstruct data corresponding to data for each cycle, corresponding to reconstruction window. ECG signal is obtained with simultaneous scanning of beating heart by of computed tomographic scanner. In fourth version of implementation system contains component of window management which automatically changes location or moves first window of reconstruction for cardiac cycle on the basis of premature cardiac cycle within ECG, which is signal synchronised with preliminarily obtained X-ray projection data of beating heart; recommendation component which automatically recommends, at least, one additional reconstruction window, on the basis of premature cardiac cycle; and reconstruction device which reconstructs data, corresponding to reconstruction windows. In order to obtain image received is ECG signal which contains premature cardiac cycle, ECG signal is synchronised in time with preliminarily obtained X-ray projection data of beating heart by multitude of cycles of heart beating. After that, first reconstruction window is moved within the limits of first cardiac cycle, which corresponds to data, different from desirable cardiac phase as a result of premature cardiac cycle. Each from multitude of cardiac cycles contains reconstruction window. Then preliminarily obtained projection data, corresponding to multitude of reconstruction windows, are reconstructed to create image data, characteristic of desirable phase of heart beating. Group of inventions also contains computer-readable data carrier, which stores commands, which, when performed by computer, make computer perform claimed method of image obtaining.

EFFECT: application of claimed group of inventions will make it possible to increase quality of resulting data of reconstructed image.

34 cl, 10 dwg