Laminated type X-ray filter grating, and manufacturing device and manufacturing method thereof

Abstract

The invention provides a laminated type X-ray filter grating with shape keeping property, rigidity, and durability. The laminated type X-ray filter grating is characterized in that printed sheets (1) formed on sheets (2) with X-ray transmissivity and containing printing layers (3) of specified patterns of X-ray absorption coating layers (4) and gap layers (5) is regarded as the unit layer, a plurality of printed sheets (1) are formed by a printed sheet laminating body (13) laminated by the sheets (2) and the printing layers (3) in an alternative manner in the lamination direction, a plurality of X-ray absorption coating layers (4) laminated in the vertical manner and clamping the sheets (2) form an X-ray absorption portion (10), and a plurality of gap layers (5) laminated in the vertical direction and clamping the sheets (2) form an X-ray transmission portion (12). Therefore, the top can be provided with an upper side plate (20) with the X-ray transmissivity, and the bottom can be provided with a lower side plate (18) with the X-ray transmissivity.

Description

technical field [0001] The present invention relates to an X-ray filter used in X-ray devices such as X-ray imaging devices and X-ray CT devices. An X-ray filter grid that passes X-rays and passes primary X-rays. Background technique [0002] Figure 12 It is a general X-ray filter grating, especially a sectional explanatory diagram of a cluster filter grating. The X-ray filter grating 114 is a plate-shaped member configured by alternately arranging through-hole X-ray transmitting portions 112 that transmit X-rays and X-ray absorbing portions 110 that absorb and block X-rays. The X-ray absorbing portion 110 is made of an X-ray absorbing metal, for example, a metal with a high atomic number such as Pb, W, Ta, Re, Pt, Au, and Cu. On the other hand, the X-ray transmitting portion 112 may be an air layer, or may be filled with a substance that easily transmits X-rays, such as Al or resin. In particular, an X-ray filter in which the X-ray transmitting portion 112 is an air lay...

AI Technical Summary

Problems solved by technology

[0010] As described above, in the case of manufacturing the X-ray filter grating by machining, there are complicated steps, and for example, about 400 sheets of metal foil are installed to form the X-ray filter grating, so there is a disadvantage that it takes a lot of time.

In addition, in the middle of machining, if several metal foils are defective, it is troublesome to replace the metal foils, etc., and the finished X-ray filter grid is also expensive.

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