METHOD FOR RECONSTRUCTING ADAPTIVE TYPE ELECTROCARDIOGRAM SYNCHRONOUS IMAGE, METHOD FOR COLLECTING ADAPTIVE TYPE ELECTROCARDIOGRAM SYNCHRONOUS PROJECTION DATA, AND X-RAY CT APPARATUS

摘要

PROBLEM TO BE SOLVED: To improve an image quality when a heart rate is low in a method for reconstructing an adaptive type electrocardiogram synchronous image, a method for collecting an adaptive type electrocardiogram synchronous projection data, and X-ray CT (Computed Tomography) apparatus.;SOLUTION: When the heart rate corresponding to projection data is equal to or less than a threshold, namely, the heart moves slowly, the image is fully reconstructed, and when the heart rate corresponding to the projection data is not less than a threshold, namely, the heart moves quickly, the image is half-reconstructed. In the full reconstruction, though time resolution is reduced, the heart moves slow to have no problem substantially and improve the image quality. In the half reconstruction, the time resolution when the heart moves quickly can be improved.;COPYRIGHT: (C)2007,JPO&INPIT