IMPROVED TEMPORAL RESOLUTION FOR MULTI-SLICE CARDIAC CT

摘要

There is therefore provided in accordance with an embodiment of the present invention, a CT scanner for providing an image of a region a patient's heart comprising: at least one X-ray cone beam for illuminating the region with X-rays; a plurality of rows of X-ray detectors that generate signals responsive to attenuation of X-rays from the at least one X-ray source that pass through the region; a controller that controls the at least one X-ray cone beam to illuminate the patient with X-rays so as to acquire attenuation data for the region during a plurality of heart cycles; and a processor that receives the signals and: determines a duration, 2DtM, of at least one imaging window centered at the heart phase of each of the heart cycles for each voxel of the region independent of determining the duration of the at least one imaging window for the other voxels; determines an attenuation value for each voxel using substantially only attenuation data acquired during the at least one window; and generates the image of the region using the determined attenuation values.