Patent Number: 
Section: claims

1. A detector module for a radiation detector in a radiation imaging apparatus, the detector module comprising:a detecting element array comprising a plurality of detecting elements arranged in a matrix form in first and second directions orthogonal to each other, the detecting element array configured to allow radiation to penetrate through spaces defined between the detecting elements;an electronic circuit arranged on a radiation emission side of the detecting element array; anda radiation shielding body arranged on a radiation incident side of the detecting element array, the radiation shielding body comprising:a base material having radiation permeability and formed with a plurality of grooves extending in the first direction at respective positions corresponding to spaces between the detecting elements in the second direction; anda plurality of radiation shielding materials each inserted in a respective groove of the plurality of grooves. 2. The detector module according to claim 1, wherein the base material includes a carbon resin. 3. The detector module according to claim 1, wherein the base material is formed in a plate-like fashion. 4. The detector module according to claim 3, wherein the base material has a plate thickness greater than or equal to 0.2 mm and less than or equal to 1 mm. 5. The detector module according to claim 1, wherein the radiation shielding materials each contain one of tungsten and molybdenum. 6. The detector module according to claim 1, wherein the radiation shielding materials are each molded in a wire form, in a bar form, or by hardening powder. 7. The detector module according to claim 1, wherein the radiation shielding materials each have a width in the second direction that is equivalent to a length that is from one to three times a width of each of the spaces. 8. The detector module according to claim 1, wherein the detecting elements each comprise a scintillator and a photoelectric conversion element. 9. The detector module according to claim 1, wherein the detecting element array comprises a light-reflecting member positioned in the spaces. 10. The detector module according to claim 1, wherein the electronic circuit comprises a circuit configured to process signals outputted from the detecting elements. 11. The detector module according to claim 1, wherein the electronic circuit comprises an integrated circuit. 12. A radiation detecting device comprising:a radiation detector in which a plurality of detector modules according to claim 1 are arranged in the first direction; anda plurality of collimator plates arranged on a radiation incident side of the radiation detector and each extending in the second direction at respective positions corresponding to the spaces defined between the detecting elements in the first direction. 13. A radiation detecting device comprising:a radiation detector in which a plurality of detector modules according to claim 2 are arranged in the first direction; anda plurality of collimator plates arranged on a radiation incident side of the radiation detector and each extending in the second direction at respective positions corresponding to the spaces defined between the detecting elements in the first direction. 14. A radiation detecting device comprising:a radiation detector in which a plurality of detector modules according to claim 11 are arranged in the first direction; anda plurality of collimator plates arranged on a radiation incident side of the radiation detector and each extending in the second direction at respective positions corresponding to the spaces defined between the detecting elements in the first direction. 15. A radiation imaging apparatus comprising a radiation detecting device according to claim 12. 16. A radiation imaging apparatus comprising a radiation detecting device according to claim 13. 17. A radiation imaging apparatus comprising a radiation detecting device according to claim 14. 18. The radiation imaging apparatus according to claim 15, wherein the radiation imaging apparatus is configured to perform radiation tomographic imaging. 19. The radiation imaging apparatus according to claim 16, wherein the radiation imaging apparatus is configured to perform radiation tomographic imaging. 20. The radiation imaging apparatus according to claim 17, wherein the radiation imaging apparatus is configured to perform radiation tomographic imaging.