Abstract: A method is provided for assembling a collimator module including a plurality of first collimator plates arrayed in a first direction, each first collimator plate having a plurality of slots formed on a plate surface, and a plurality of second collimator plates arrayed in a second direction orthogonal to the first direction, wherein each second collimator plate penetrates respective slots along the first direction so as to form a lattice-shape. The method includes positioning the plurality of first collimator plates by moving a first collimator plate in one direction along the second direction, so that a side wall of a first cutout formed on an edge of a radiation incident side or a radiation output side of the first collimator plate contacts a member extending in the first direction.

Abstract: A radiation focal position detecting method for detecting a positional displacement of a focal point of a radiation source in a radiation tomographic imaging apparatus is provided. The method includes providing a radiation absorber that covers parts of first and second detecting element regions, the parts lying on mutually adjoining sides of the first and second detecting element regions in a radiation detector including a plurality of detecting elements arranged in channel and slice directions, and specifying, based on intensities of radiation detected by the detecting elements in the first and second detecting element regions, a position of the focal point or an amount of movement of the focal point from a reference position.

Abstract: A detector module for a radiation detector in a radiation imaging apparatus is provided. The detector module includes a detecting element array including 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, and a radiation shielding body arranged on a radiation incident side of the detecting element array. The radiation shielding body includes 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, and a plurality of radiation shielding materials each inserted in a respective groove of the plurality of grooves.

Abstract: A detector module for a radiation detector in a radiation imaging apparatus is provided. The detector module includes a detecting element array including 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, and a radiation shielding body arranged on a radiation incident side of the detecting element array. The radiation shielding body includes 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, and a plurality of radiation shielding materials each inserted in a respective groove of the plurality of grooves.

Abstract: A two-dimensional collimator module is provided. The two-dimensional collimator module includes first collimator plates arranged in a channel direction, second collimator plates arranged in a slice direction and combined with the first collimator plates to form a lattice, and a first block and a second block that hold the first collimator plates, wherein each of the first collimator plates is formed with slits, each of the second collimator plates is inserted through an associated row of the slits, first plate surfaces of the second collimator plates in the slice direction abut only first wall surfaces of first and second wall surfaces of the slits in the slice direction in a first set of the first collimator plates, and second plate surfaces of the second collimator plates opposite to the first plate surfaces abut only the second wall surfaces of the slits in a second set of first collimator plates.

Abstract: A radiation tomography system is provided. The radiation tomography system includes a radiation source configured to rotate around a subject and apply radiation to the subject, a plurality of radiation detecting elements disposed opposite the radiation source, a plurality of collimator plates partitioning the radiation detecting elements in a channel direction, the collimator plates erected such that plate surfaces of each of the plurality of collimator plates extend along a direction of radiation from the radiation source, and an aperture-width changing unit configured to change a width of each aperture formed by the plurality of collimator plates by moving a plurality of radiation absorbing members along respective end sides of the collimator plates close to the radiation source, the plurality of radiation absorbing members moveable between a first position at which the end sides are covered and a second position at which the end sides are exposed.

Abstract: A method is provided for assembling a collimator module including a plurality of first collimator plates arrayed in a first direction, each first collimator plate having a plurality of slots formed on a plate surface, and a plurality of second collimator plates arrayed in a second direction orthogonal to the first direction, wherein each second collimator plate penetrates respective slots along the first direction so as to form a lattice-shape. The method includes positioning the plurality of first collimator plates by moving a first collimator plate in one direction along the second direction, so that a side wall of a first cutout formed on an edge of a radiation incident side or a radiation output side of the first collimator plate contacts a member extending in the first direction.

Abstract: A radiation imaging apparatus is provided. The radiation imaging apparatus includes a radiation source configured to emit radiation from a first focal point, a plurality of radiation detecting elements disposed opposite to the radiation source and arranged in a channel direction, a plurality of collimator plates provided along the channel direction so as to separate the radiation detecting elements, the collimator plates including radiation absorption members at surfaces of at least one first collimator plate located on a first end side and at least one second collimator plate located on a second end side such that radiation shielding effects of the first and second collimator plates become substantially equivalent when the surfaces of the first and second collimator plates are located along a radial direction from a second focal point, and a data acquisition unit configured to acquire radiation projection data from the radiation detecting elements.

Abstract: A radiation detection device is provided. The radiation detection device includes a pair of rails spaced in a slice direction and extending parallel to a channel direction, and a plurality of collimator modules arranged along the channel direction on a radiation exit side of the pair of rails, wherein at least one of the pair of rails extending along the channel direction includes a plate member with a plurality of notches formed along the radiation exit side, and wherein the collimator modules each include a first pin protruding on a radiation incidence side and attached to the pair of rails with the first pin fitted in one of the notches of the plate member.

Abstract: A radiation focal position detecting method for detecting a positional displacement of a focal point of a radiation source in a radiation tomographic imaging apparatus is provided. The method includes providing a radiation absorber that covers parts of first and second detecting element regions, the parts lying on mutually adjoining sides of the first and second detecting element regions in a radiation detector including a plurality of detecting elements arranged in channel and slice directions, and specifying, based on intensities of radiation detected by the detecting elements in the first and second detecting element regions, a position of the focal point or an amount of movement of the focal point from a reference position.

Abstract: A radiation detection device is provided. The radiation detection device includes a pair of rails spaced in a slice direction and extending parallel to a channel direction, and a plurality of collimator modules arranged along the channel direction on a radiation exit side of the pair of rails, wherein at least one of the pair of rails extending along the channel direction includes a plate member with a plurality of notches formed along the radiation exit side, and wherein the collimator modules each include a first pin protruding on a radiation incidence side and attached to the pair of rails with the first pin fitted in one of the notches of the plate member.

Abstract: A method is provided for assembling a collimator module including a plurality of first collimator plates arrayed in a first direction, each first collimator plate having a plurality of slots formed on a plate surface, and a plurality of second collimator plates arrayed in a second direction orthogonal to the first direction, wherein each second collimator plate penetrates respective slots along the first direction so as to form a lattice-shape. The method includes positioning the plurality of first collimator plates by moving a first collimator plate in one direction along the second direction, so that a side wall of a first cutout formed on an edge of a radiation incident side or a radiation output side of the first collimator plate contacts a member extending in the first direction.

Abstract: A radiation imaging apparatus is provided. The radiation imaging apparatus includes a radiation source configured to emit radiation from a first focal point, a plurality of radiation detecting elements disposed opposite to the radiation source and arranged in a channel direction, a plurality of collimator plates provided along the channel direction so as to separate the radiation detecting elements, the collimator plates including radiation absorption members at surfaces of at least one first collimator plate located on a first end side and at least one second collimator plate located on a second end side such that radiation shielding effects of the first and second collimator plates become substantially equivalent when the surfaces of the first and second collimator plates are located along a radial direction from a second focal point, and a data acquisition unit configured to acquire radiation projection data from the radiation detecting elements.

Abstract: A collimator module (10A) comprises a plurality of collimator single plates (11) having a pair of long sides and a pair of short sides and a pair of blocks (12) including a plurality of first grooves (125) extending along an irradiation direction of the X-rays. The short sides are inserted into the first grooves to support the collimator single plates. A supporting member is configured to cover the long sides from an incident side and an emission side of the X-rays. The supporting member includes an incident side fixing sheet (13) and an emission side fixing sheet (15) each having a plurality of second grooves into which the long sides are inserted to support the plurality of collimator single plates. The fixing sheets cover the first grooves and at least a portion of each of the long sides.

Abstract: A two-dimensional collimator module is provided. The two-dimensional collimator module includes first collimator plates arranged in a channel direction, second collimator plates arranged in a slice direction and combined with the first collimator plates to form a lattice, and a first block and a second block that hold the first collimator plates, wherein each of the first collimator plates is formed with slits, each of the second collimator plates is inserted through an associated row of the slits, first plate surfaces of the second collimator plates in the slice direction abut only first wall surfaces of first and second wall surfaces of the slits in the slice direction in a first set of the first collimator plates, and second plate surfaces of the second collimator plates opposite to the first plate surfaces abut only the second wall surfaces of the slits in a second set of first collimator plates.

Abstract: A pair of holding plates formed with a plurality of grooves each wider than the thickness of each collimator plate are disposed in parallel so that the respective surfaces formed with the grooves confront each other. Urging members are disposed on the holding members. When the urging members slide in the arranged direction of the grooves along the grooves-formed surfaces of the holding members, the urging members urge individual collimator plates inserted in the grooves toward side walls of the grooves. The collimator plates are inserted into the grooves, then the urging members are slid and held in that slide position to urge individual collimator plates into close contact with side walls of the grooves.

Abstract: A collimator module (10A) comprises a plurality of collimator single plates (11) having a pair of long sides and a pair of short sides and a pair of blocks (12) including a plurality of first grooves (125) extending along an irradiation direction of the X-rays. The short sides are inserted into the first grooves to support the collimator single plates. A supporting member is configured to cover the long sides from an incident side and an emission side of the X-rays. The supporting member includes an incident side fixing sheet (13) and an emission side fixing sheet (15) each having a plurality of second grooves into which the long sides are inserted to support the plurality of collimator single plates. The fixing sheets cover the first grooves and at least a portion of each of the long sides.

Abstract: A pair of holding plates formed with a plurality of grooves each wider than the thickness of each collimator plate are disposed in parallel so that the respective surfaces formed with the grooves confront each other. Urging members are disposed on the holding members. When the urging members slide in the arranged direction of the grooves along the grooves-formed surfaces of the holding members, the urging members urge individual collimator plates inserted in the grooves toward side walls of the grooves. The collimator plates are inserted into the grooves, then the urging members are slid and held in that slide position to urge individual collimator plates into close contact with side walls of the grooves.

Abstract: The present invention provides a detector which suppress the crosstalk between detector cells while improving the acquisition efficiency of X-ray radiation. The detector includes a plurality of detector cells, arranged along a detection plane of X-ray, in which each detector cell has a scintillator unit made of a scintillator, and a photodiode for transduce the light incoming from the scintillator unit into electric signals. The scintillator units are partitioned each from another by the border, which has a groove extending in the channel and row directions. A scintillator is provided in some part of the border in the incident X-ray direction.

Abstract: The present invention provides a detector which suppress the crosstalk between detector cells while improving the acquisition efficiency of X-ray radiation. The detector includes a plurality of detector cells, arranged along a detection plane of X-ray, in which each detector cell has a scintillator unit made of a scintillator, and a photodiode for transduce the light incoming from the scintillator unit into electric signals. The scintillator units are partitioned each from another by the border, which has a groove extending in the channel and row directions. A scintillator is provided in some part of the border in the incident X-ray direction.