CN1959388B - A Solid Detector Array Structure Used in Radiation Imaging System - Google Patents

Abstract

A solid detector array structure used in a radiation imaging system belongs to the technical field of radiation detection. It consists of multiple scintillation crystals coupled with photodiodes. Its structural feature is that each scintillation crystal and photodiode are bonded and solidified and coated with a reflective layer to form a single detector. The detectors are arranged sequentially and separated from each other by partitions and solidified. The bottom of each photodiode is fitted with an insulator. The separators and insulators are embedded in the metal groove to form a detector array. The detector array is laid with a lead plate and a sponge rubber layer, which are contained and fixed on the metal groove plate by the metal outer cover. Compared with the prior art, the present invention not only has the advantages of light-proof, moisture-proof, vibration-proof, strong electromagnetic anti-interference ability, convenient installation and maintenance, but also improves the radiation anti-scattering and anti-interference ability, and can greatly improve the definition of imaging.

Description

A Solid Detector Array Structure Used in Radiation Imaging System

technical field

The invention belongs to the technical field of radiation detection, and relates to a solid-state detector device used in X and gamma radiation imaging systems.

Background technique

In the prior art, Chinese patent 02286053.3 discloses a solid-state detector for radiation imaging. The detector array composed of it has high detection efficiency and sensitivity, radiation resistance, anti-scattering, electromagnetic anti-disturbance capabilities, and environmental adaptability. It has the advantages of strong stability and zero flicker light interference. However, since the housing material of a single detector is stretched from a material with a lower density and the space is narrow, heavy metal materials cannot be placed in it too thick, otherwise the dead zone will be too large, so the ray interference and scattering will not be reduced thoroughly. .

Contents of the invention

In order to solve the problems existing in the above-mentioned prior art, the object of the present invention is to provide a solid detector array structure used in a radiation imaging system, which can solve the problem of avoiding light, moisture, vibration, and strong electromagnetic anti-interference ability. , The advantages of convenient installation and maintenance, at the same time, without reducing the sensitive area and without increasing the dead area, it can maximize the ability of anti-scattering and anti-interference of rays, and improve the definition of imaging.

In order to achieve the above-mentioned purpose of the invention, the technical solution of the present invention is realized in the following manner:

A solid-state detector array structure used in a radiation imaging system, which includes a plurality of scintillation crystals formed by cesium iodide or cadmium tungstate and photodiodes coupled thereto. Its structural feature is that the scintillation crystals and photodiodes are bonded and solidified and coated with a reflective layer to form a single detector. The detectors are arranged sequentially and separated from each other by partitions and bonded and solidified. The bottom of each photodiode is fitted with an insulator and its pins are extended downward. The partitions and insulators are embedded in the metal slot plate to form a detector array composed of a plurality of detectors. A lead plate is laid on the detector array, a sponge rubber layer is placed on the lead plate, and the detector array is contained and fixed on the metal groove plate by the metal outer cover.

Because the present invention adopts the above-mentioned structure, the single detectors formed by bonding the scintillation crystals and photodiodes are arranged in sequence, and spacers made of heavy metals such as tungsten are used to isolate each detector, and on each spacer A lead plate is laid, which greatly improves the anti-interference and anti-scattering ability of the detector. In addition, anti-mildew, light-proof, and moisture-proof glue is applied to the connection gap between the metal cover and the metal slot plate, insulator, etc. On the one hand, it is completely protected from light, and on the other hand, the electromagnetic anti-interference performance of the detector array is increased. There are sponge rubber layers between the front and back of the detector crystal and the outer cover, between the lead plate and the outer cover, which improves the shockproof performance. Therefore, the present invention has the characteristics of anti-scattering, anti-jamming, light-proof, moisture-proof, shock-proof, small dead zone, detachable and the like. For a detector formed by using a single photodiode and a single crystal, during maintenance, the single detector can also be replaced without destroying a basic measurement unit. It is very convenient to check the fault and greatly reduce the maintenance cost.

Description of drawings

Fig. 1 is a schematic sectional view of the structure of the present invention;

Fig. 2 is a schematic cross-sectional view of the structure A-A in Fig. 1;

Fig. 3 is a schematic view in direction B of Fig. 1;

Fig. 4 is the C direction view of Fig. 1;

Fig. 5 is a use state diagram of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to FIGS. 1 to 4 , the solid-state detector array structure of the present invention includes a plurality of scintillation crystals 4 formed of cesium iodide or cadmium tungstate and photodiodes 3 coupled thereto. Each scintillation crystal 4 and photodiode 3 are bonded and cured with an optically transparent adhesive and coated with a reflective layer to form a single detector. The detectors are arranged sequentially and separated from each other by partitions 9 made of heavy metals and bonded and solidified. The bottom of each photodiode 3 is covered with an insulator 2 and its pins are extended. Each partition plate 9 and insulator 2 are embedded on the metal slot plate 1 to form a detector array composed of a plurality of detectors. A lead plate 5 is laid on the detector array, and a sponge rubber layer 6 is placed on the lead plate 5 . The metal housing 7 that is stretched and formed with copper and plated with nickel contains the detector array and is fixed on the metal slot plate 1 by screws 8 . Moisture-proof, shockproof and light-proof glue is coated on the contact gap between the metal cover 7 and the metal slot plate 1 and each insulator 2 .

Referring to Fig. 5, when using the present invention, the solid state detector array is installed on a printed circuit board 10 by the installation hole that establishes additionally on the metal slot plate 1, and the printed circuit board is provided with the connection and the bias of the detector, Of course, no bias voltage can be added, so that the angle between the incident ray and the fixed detector is close to 0 degrees, which can reduce crosstalk.

Claims (5)

1. A solid-state detector array structure used in a radiation imaging system, it includes a plurality of scintillation crystals (4) formed by cesium iodide or cadmium tungstate and photodiodes (3) coupled therewith, characterized in that , the scintillation crystals (4) and photodiodes (3) are bonded and cured and coated with a reflective layer to form a single detector, each detector is arranged in sequence and separated from each other by a partition (9) and bonded and cured, each photodiode ( 3) The bottom of the insulator (2) is set and the pins are extended downward, and each partition (9) and insulator (2) are embedded in the metal slot plate (1) to form a detector array composed of multiple detectors. A lead plate (5) is laid on the detector array, a sponge rubber layer (6) is placed on the lead plate (5), and the detector array is accommodated and fixed on the metal slot plate (1) by a metal outer cover (7). 2. The solid-state detector array structure used in a radiation imaging system according to claim 1, characterized in that, the metal housing (7) is formed by stretching copper and plated with nickel. 3. The solid-state detector array structure used in a radiation imaging system according to claim 1, characterized in that the material of the partition (9) is tungsten alloy. 4. The solid-state detector array structure used in the radiation imaging system according to claim 1, 2 or 3, characterized in that, the connection between the metal housing (7) and the metal slot plate (1) adopts screws (8 )fixed. 5. The solid-state detector array structure used in a radiation imaging system according to claim 4, characterized in that, the contact gap between the metal cover (7) and the metal slot plate (1) and each insulator (2) is coated with There are moisture-proof, shock-proof and light-proof materials.

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