| 摘要 |
PROBLEM TO BE SOLVED: To prevent a collimator from falling from a radiation detector even when adhesion failure occurs in the radiation detector in which the collimator is adhered to a detection element array.SOLUTION: A radiation detector comprises: a detection element array in which a plurality of detection elements are substantially arrayed in a fan angle direction and a cone angle direction of the radiation; a collimator which is adhered to the radiation incident side of the detection element array and whose outer end faces on both sides in a slice direction are formed in the tapered shape along a radial direction from a radiation source; and a pair of blocks which is arranged so as to sandwich the collimator in the cone angle direction and whose inner end faces on both sides in the cone angle direction are formed in the tapered shape along the radial direction. |
