Radiation detector, and radiation imaging apparatus provided with detector

摘要

An X-ray detector is provided with a plurality of modules each having a plurality of detection elements each composing a pixel, in which the detection elements convert incoming radiations to electric data depending on amounts of the radiations. The plural modules are mutually adjacently arranged on the same surface with a gap having a known width formed therebetween, such that the modules are arranged along at least one of a first X-axis and a first Y-axis, wherein the radiation detector is given a scan direction which is set along one of the first X- and Y-axes and the first Y-axis is perpendicular to the first X-axis. The plural detection elements of each module are two-dimensionally arranged along a second X-axis and a second Y-axis which are set obliquely to the first X-axis and the first Y-axis respectively and which are perpendicular to each other.

主权项

1. A radiation detector comprising:
a plurality of modules each provided with a rectangular radiation incidence surface in which a plurality of detection elements are arrayed, each of the detection elements composing a pixel, converting an incoming radiation to an electronic data, and outputting the electronic data whose amount corresponds to an amount of the incoming radiation, wherein the plurality of modules are mutually adjacently arranged on the same surface with a gap having a known width formed therebetween, such that the modules are arranged along at least one of a first X-axis and a first Y-axis, wherein the radiation detector is given a scan direction which is set along one of the first X-axis and the first Y-axis and the first Y-axis is perpendicular to the first X-axis; and the plurality of detection elements of each of the modules are two-dimensionally arranged along a second X-axis and a second Y-axis which are set obliquely to the first X-axis and the first Y-axis respectively and which are perpendicular to each other, wherein the second X-axis and the second Y-axis have a relative angle to the first X-axis and the first Y-axis respectively, the relative angle being a range of 6-20.7 degrees, the relative angle being set based on a use rate of area in the radiation incidence surface of the radiation detector, a required area rate required for uniformity correction of the data outputted from the radiation detector, and an influence rate of the known width in the scan direction, and the radiation detector comprises a shielding member arranged in the gap between ones of the plurality of modules mutually adjacent, the shielding member having a width narrower than the gap, having a surface covered by electrical insulating material, and containing therein a material with a specific gravity of equal or higher to or than the detection elements.