X-ray collimator, X-ray detector system and CT device

An X-ray detector system comprising:

• a plurality of detector sub-modules;
• and
• a plurality of X-ray collimators,
• wherein each of the plurality of X-ray collimators is mounted on a different corresponding detector sub-module of the plurality of detector sub-modules, and the plurality of X-ray collimators and the plurality of detector sub-modules are spliced along at least one of a first direction or a second direction of the X-ray detector system, and
• wherein each of the X-ray collimators comprises:
• a collimator body formed by three-dimensional (3D) printing;
• and
• one or more side plates formed by non-3D printing,
• wherein the collimator body comprises:
• a plurality of first through holes,
• a plurality of body side walls, and
• a plurality of openings located on at least one side of the collimator body,
• wherein the plurality of first through holes and the plurality of openings are enclosed by respective body side walls, extend through the collimator body, and are arranged in an array,
• wherein the one or more side plates have a thickness smaller than a thickness of the body side walls,
• wherein the one or more side plates are connected with the at least one side of the collimator body to constitute a plurality of second through holes together with the plurality of openings, the first through holes and the second through holes constituting a plurality of through holes of the X-ray collimator, and
• wherein each through hole of the plurality of through holes has a square-frustum-like shape with extension lines of four lateral edges intersecting at a focus of an emission source of X-rays, such that the X-rays pass through the through hole.

A computed tomography (CT) device comprising:

• a bulb tube emitting X-rays;
• and
• a X-ray detector system,
• wherein the X-ray detector system comprises:
• a plurality of detector sub-modules;
• and
• a plurality of X-ray collimators configured to collimate the X-rays,
• wherein each of the plurality of X-ray collimators is mounted on a different corresponding detector sub-module of the plurality of detector sub-modules, and the plurality of X-ray collimators and the plurality of detector sub-modules are spliced along at least one of a first direction or a second direction of the X-ray detector system, and
• wherein each of the X-ray collimators comprises:
• a collimator body formed by three-dimensional (3D) printing;
• and
• one or more side plates formed by non-3D printing,
• wherein the collimator body comprises:
• a plurality of first through holes,
• a plurality of body side walls, and
• a plurality of openings located on at least one side of the collimator body,
• wherein the plurality of first through holes and the plurality of openings are enclosed by respective body side walls, extend through the collimator body, and are arranged in an array,
• wherein the one or more side plates have a thickness smaller than a thickness of the body side walls,
• wherein the one or more side plates are connected with the at least one side of the collimator body to constitute a plurality of second through holes together with the plurality of openings, the first through holes and the second through holes constituting a plurality of through holes of the X-ray collimator, and
• wherein each through hole of the plurality of through holes has a square-frustum-like shape with extension lines of four lateral edges intersecting at a focus of an emission source of X-rays, such that the X-rays pass through the through hole.