Patent ID: 7561660

Claim:
A radiation CT system that scans a subject by rotating about the subject's body axis a radiation source which irradiates radiation to the subject, and that constructs tomographic images of the subject on the basis of a distribution of doses of radiation which are used to produce a plurality of views, the radiation CT system comprising: a multi-array detector that has a plurality of detector elements, each of which converts radiation into an electric signal and transmits the electric signal, set in array in a direction of channels that is a direction around the body axis and in a direction of slices that is a direction parallel to the body axis, and that is opposed to the radiation source with the subject between them; a data acquisition system that acquires data items representing doses of radiation incident on the multi-array detector on the basis of output signals of the plurality of detector elements; and a data processing unit that identifies a distribution of doses of radiation incident on the multi-array detector, which is used to construct the tomographic images, according to the data items acquired by the data acquisition system, wherein the data acquisition system includes: a plurality of amplifiers that amplifies signals produced by the plurality of detector elements and outputs the amplified signals, wherein a number of the plurality of amplifiers is smaller than a number of the plurality of detector elements; and a switching means that changes the continuities between the plurality of detector elements and the plurality of amplifiers so that detector elements whose signals are amplified by each of the plurality of amplifiers will be changed into others juxtaposed in the direction of slices.