Splicing CT detector module unit

Abstract

The utility model discloses a splicable CT (Computed Tomography) detector module unit, which belongs to the technical field of CT detectors and comprises a photodiode substrate, one side of the outside of the photodiode substrate is electrically connected with a first rigid circuit board, and the other side of the outside of the photodiode substrate is electrically connected with a scintillator. The first rigid circuit board is electrically connected with a flexible circuit board, the flexible circuit board is electrically connected with a second rigid circuit board, and a metal structural member is installed outside the first rigid circuit board. Meanwhile, multi-row arrangement can be conveniently carried out on the basis of transverse arrangement, so that multiple rows of detector module units form a plane, and the number of detector pixel units can be infinitely increased theoretically according to requirements, so that the number of the detector pixel units can be conveniently increased, the scanning range of the CT detector can be enlarged, and the image quality can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to CT detector technical field, concretely is a kind of splicing CT detector module unit. BACKGROUND

[0002] In our country, in recent years, computed tomography (CT) technology is widely used in medical and security inspection field.

[0003] CT detector is one of the core components of CT. CT detector is composed of multiple detector modules, and the detector module receives X-ray irradiation, and the scintillator therein is excited to generate visible light, which is converted into photocurrent by photodiode, and transmitted to the back-end analog-digital conversion chip for analog-digital conversion, and the converted digital signal is transmitted to the host computer for reconstruction and image imaging; wherein, the number of pixels arranged in multiple rows of detector determines the range of objects that can be scanned by CT machine in one rotation, and further determines the image quality.

[0004] At present, the detector of most CT devices is composed of multiple detector module units arranged in transverse splicing, and multiple scintillator pixel units and the photodiodes below them form an array; the scintillator converts X-ray into visible light, and the visible light is absorbed by the photodiode array and converted into electrical signal, and then the original electrical signal is output from the side of the photodiode to the upper surface of the substrate below through wire bonding process, and the substrate provides the lead signal to the analog-digital conversion chip through connector or other means for processing.

[0005] Due to the increasing demand for the number of pixel units when multiple rows of detector module units are composed into a plane, the number of bonding leads is increased, and the difficulty of substrate wiring is increased, so that the number of pixel units in the Z direction of the detector is difficult to increase indefinitely. SUMMARY

[0006] The utility model aims at at least one of the technical problems existing in prior art.

[0007] Therefore, one purpose of the utility model is to provide a splicing CT detector module unit, which can increase the number of detector detection pixel units, increase the scanning range of CT detector and improve the image quality.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: a splicable CT detector module unit, including photodiode substrate, the outside one side of photodiode substrate is electrically connected with first rigid circuit board, the outside other side of photodiode substrate is electrically connected with scintillator, first rigid circuit board is electrically connected with flexible circuit board, flexible circuit board is electrically connected with second rigid circuit board, the outside installation of first rigid circuit board has metal structural member, and one end of flexible circuit board is along the profile surface of metal structural member and is pasted.

[0009] Preferably, the second rigid circuit board is welded with an analog-digital conversion chip outside.

[0010] Preferably, a digital interface is installed on the second rigid circuit board.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model can meet the demand of CT detector module unit in transverse splicing arrangement, and it is convenient to arrange multiple rows on the basis of transverse arrangement, so that multiple rows of detector module units form a plane, and theoretically, the number of detector pixel units can be infinitely increased according to demand, so as to facilitate increasing the number of detector pixel units, and the CT detector can increase the scanning range and improve the image quality. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a structure schematic view of the splicable CT detector module unit of the utility model;

[0014] Fig. 2 It is a structure schematic view of the digital interface in the splicable CT detector module unit of the utility model;

[0015] Fig. 3 It is a structure schematic view of the metal structural member in the splicable CT detector module unit of the utility model.

[0016] In the drawing: 1, photodiode substrate; 2, scintillator; 3, first rigid circuit board; 4, metal structural member; 5, flexible circuit board; 6, second rigid circuit board; 7, analog-digital conversion chip; 8, digital interface. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Referring to Figs. 1-3 The embodiment of the utility model provides a kind of splicing CT detector module unit, comprising: photodiode substrate 1, the outside one side of photodiode substrate 1 is electrically connected with first rigid circuit board 3, the outside other side of photodiode substrate 1 is electrically connected with scintillator 2, first rigid circuit board 3 is electrically connected with flexible circuit board 5, flexible circuit board 5 is electrically connected with second rigid circuit board 6, first rigid circuit board 3 is externally installed with metal structural member 4, and one end of flexible circuit board 5 is adhered along the profile surface of metal structural member 4.

[0019] Photodiode substrate 1, scintillator 2, first rigid circuit board 3 and metal structural member 4 are electrically connected together, and flexible circuit board 5 is closely adhered to the profile surface of metal structural member 4, which can not only leave space for the horizontal splicing of multiple utility models during installation, but also avoid X-ray from penetrating through the vertical gap and irradiating flexible circuit board 5 during the vertical splicing of multiple utility models, causing unnecessary radiation damage.

[0020] Second rigid circuit board 6 is welded with analog-digital conversion chip 7 outside, and digital interface 8 is installed on second rigid circuit board 6.

[0021] Analog-digital conversion chip 7 is used to directly complete analog-digital conversion from analog signal to digital signal, reducing noise caused by distributed capacitance of analog signal line.

[0022] According to the above technical solution, the working steps of the present scheme are summarized and combed: the utility model connects photodiode substrate 1, scintillator 2, first rigid circuit board 3 and metal structural member 4 together, and flexible circuit board 5 is closely adhered to the profile surface of metal structural member 4, which can not only leave space for the horizontal splicing of multiple utility models during installation, but also avoid X-ray from penetrating through the vertical gap and irradiating flexible circuit board 5 during the vertical splicing of multiple utility models, causing unnecessary radiation damage.

[0023] The parts not involved in the utility model are the same as the prior art or can be realized by using the prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A modular unit for a splicable CT detector, comprising a photodiode substrate (1), characterized in that: One side of the exterior of the photodiode substrate (1) is electrically connected to a first rigid circuit board (3), the other side of the exterior of the photodiode substrate (1) is electrically connected to a scintillator (2), the first rigid circuit board (3) is electrically connected to a flexible circuit board (5), the flexible circuit board (5) is electrically connected to a second rigid circuit board (6), a metal structure (4) is installed on the exterior of the first rigid circuit board (3), and one end of the flexible circuit board (5) is bonded along the contour surface of the metal structure (4).

2. The modular CT detector unit according to claim 1, characterized in that: An analog-to-digital conversion chip (7) is welded to the outside of the second rigid circuit board (6).

3. The modular CT detector unit according to claim 1, characterized in that: A digital interface (8) is installed on the second rigid circuit board (6).

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