X-ray ct apparatus and image noise reduction method

Abstract

An X-ray CT apparatus that can obtain a tomogram having high spatial resolution without increasing the effect of system noise and dosage is provided. The X-ray CT apparatus has an X-ray source for emitting X-ray, an X-ray detector having plural X-ray detecting elements that detect X-ray transmitted through an examinee as attenuation data and are arranged in a channel direction, a data combining unit for combining attenuation data of plural X-ray detecting elements in the channel direction to obtain composite data, a data decomposing unit for decomposing composite data to obtain respective decomposition data of the plural X-ray detecting elements, and an image re-constructing unit for re-constructing an image of the examinee by using the decomposition data.

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