X-RAY CT DEVICE

The present invention prevents aliasing of the X-ray detector from lowering the spatial resolution and enhances the precision of measurement in an X-ray CT device. An X-ray CT device for capturing an X-ray transmission image from a plurality of angular directions with respect to an object and generating a tomographic image of the object on the basis of the transmission images, wherein a plurality of detection pixels of an X-ray detector (2) are added together and a signal is retrieved, and also the adding positions of the plurality of detection pixels are changed in synchronization with a plurality of image scanning timings, thereby allowing a computer (CPU), which is a signal processing unit, to enhance the spatial resolution without lowering the S/N of the CT image thus measured. This has the effect of making it possible to measure finer structures, such as blood vessels, and enhance the diagnostic capability, without having to increase the subject's exposure in, for example, medical CT.