| 摘要 |
An X-ray CT apparatus includes a plurality of X-ray tubes, a plurality of X-ray detectors corresponding to the plurality of X-ray tubes, respectively, a support mechanism which supports the X-ray tubes and the X-ray detectors to allow the X-ray tubes and the X-ray detectors to rotate about a single rotation axis, a reconstruction unit which reconstructs image data on the basis of outputs from the X-ray detectors, and a plurality of filters which are respectively provided for the plurality of X-ray tubes and each have a characteristic in which an X-ray path length changes along a curve approximate to an inverted Gaussian curve from the rotation center to the two ends of an X-ray beam.
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