JPS59676A - X-ray detector - Google Patents

Abstract

PURPOSE:To eliminate the need of a lead wire for electric wiring to an electrode, by providing an electrode pattern adjusted the pitch to a flat board holding a signal electrode plate and a common electrode plate and also, providing a soldering layer on the one side part. CONSTITUTION:A signal electrode plate 6 and a common electrode plate 7, are provided a soldering layer 10. Two flat boards 11, 12 are arranged facing each other and an electrode pattern 11a is provided on the one hand board 11 adjusting to the pitch of each arranged electrode plate. Accordingly, the one side provided with the layer 10 of each plate 6, 7 is accorded with the pattern 11a of the board 11 by arranging each electrode 6, 7 at a fixed interval. Further, the layer 10 and the pattern 11a are fixed at ita part by heating the layer 10 and the pattern 11a in this accorded state. Consequently, electric wiring to the electrode is carried out without using a lead wire by processing in this manner.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an X-ray detector. To explain in more detail, X
The present invention relates to an X-ray detector used in a radiation combinator tomography apparatus (hereinafter simply referred to as an X@CT apparatus).

An X@CT device irradiates a subject with XIM from an X-ray tube, detects the X-rays that have passed through the subject using an A tomographic image of the subject is obtained by processing.

First, we will explain the operating principle of the X-ray detector used in the present invention as well as the conventionally known detector.
This will be explained using figures. FIG. 1 is a partially cutaway view of the case so that an example of the appearance of the X-ray detector and an example of its internal configuration can be seen.

However, in order to make the principle of operation easier to understand, the structure and flat plate of the electrode plate portion, which is the main point of the present invention, are omitted from the illustration. In the figure, 1 represents a case, which is filled with high-pressure X-ray detection gas 2. The type and pressure of the X-ray detection gas 2 are selected from those well known to those skilled in the art.

For example, rare gases with large atomic numbers such as xenon, krypton, and argon are used. The front part 5 of the case 1 is
It is made of a material that is transparent to X-rays, such as plasti, aluminum, or the like. Here, it can be said that the detection gas 2 filling the case 1 is substantially opaque to X-ray frequency radiation, while the front surface 3 is substantially transparent. Reference numeral 5 represents an X-ray beam to be detected, which enters from the direction shown in FIG. 6 represents a signal electrode plate, and 7 represents a common electrode plate. The signal electrode plate 6 and the common electrode plate 7 have a planar shape as shown in FIG. 1, and are arranged in a sector shape substantially parallel to the incident X-ray 5 in the direction shown in the figure. The signal electrode plates 6 and the common electrode plates 7 are alternately arranged at approximately equal intervals.

As a result, the intervening portion constitutes the X-ray detection compartment, with a 4° angle.
Typically, the common electrode plate 7 is made of a material that is opaque to X-rays in order to prevent secondary photons from penetrating into adjacent detection compartments due to the scattering of secondary photons caused by the incident X-rays.

Each common electrode plate 7 is connected to a common potential (usually ground potential), and a DC voltage v1 (not shown) is applied between each signal electrode plate 6 and this common electrode plate 7.

Note that in this specification, the signal electrode plate 6 does not simply mean a plate made of a conductive substance, but also refers to a plate in which mutually insulated electrodes are provided on the front and back sides of the flat plate. Including those with a configuration. Further, the common electrode plate 7 is usually composed of a plate made of a material that is opaque to X-rays and has conductivity.
The present invention is also applicable to a structure in which mutually insulated electrodes are provided on the front and back sides of a flat plate, respectively.

When X-rays pass through the front section 3 of the X-ray detector shown in FIG.
interacts with the atoms of and generates electron-ion pairs, which flow along the electric field and cause a current to flow between the signal electrode plate 6 and the common electrode plate 7. The value of this generated current corresponds to the incident X-ray energy, so by measuring the current flowing through the lead wires connected to each signal electrode plate 6, the incident X-ray energy for each detection compartment is measured. be able to.

X+11i of such operation! In the detector, FIG. 2 is a diagram showing an example of electrical connection of conventional electrode plates (signal electrode plate 6 and common electrode plate 7). In the same figure, 6 and 7
are a signal electrode plate and a common electrode plate similar to those explained in FIG. L is a common line and is connected to a potential (for example, ground potential). Moreover, each common electrode plate 7 is
It is connected to the common line by the common lead line lIC. On the other hand, each signal electrode plate 6 is connected to a signal lead wire eS. Then, the common wire and each signal lead ms are taken out of the case 1 (see FIG. 1) of the X-ray detector. Note that the connection between each common lead wire ec, each signal lead wire 4, and each electrode plate is performed, for example, by bonding.

The conventional electrode wiring means as described above has the following drawbacks.

Therefore, wiring as shown in FIG. 2 requires an enormous amount of wiring time.

←) Normally, the electrode plates are of a small shape and the intervals between each electrode plate are extremely narrow, so the signal lead wire eS
A thin wire is used for the common lead wire &.

Therefore, the signal lead wire es and the common lead wire Cc are often broken or short-circuited to each other.

(c) Each electrode plate 6, 7 and signal lead wire e8. Connection with the common lead wire ea is performed by bonding or the like, but peeling of the electrode at the bonding portion P poses a problem.

The present invention solves the above-mentioned drawbacks, and includes lead wires,
It is an object of the present invention to provide an X-ray detector in which electrical wiring can be made to the electrodes of each electrode plate through the la.

The present invention comprises a pair of flat plates on which electrode plates are arranged and fixed at approximately equal intervals as shown in FIGS. 1 and 2, and each electrode plate is arranged on at least one of the flat plates. A layer of electrodes (a turn is provided and at least one side of each electrode plate) is provided to match the pitch of the electrode plate, and by heating, the electrode pattern of the flat plate and one side of each electrode plate are formed. An X-ray detector is used to mark and mark the area.

The present invention will be described in detail below based on the drawings.

3 and 4 are views showing one example of the electrode plate used in the present invention, FIG. 5 is a perspective view, and FIG. 4 is a sectional view viewed from the thickness direction. In FIGS. 3 and 4, 6 is a signal electrode plate similar to that described above, and 7 is also a common electrode plate. Reference numeral 10 is a nine-inch joint provided on the 6.701 side portion of the electrode plate.

FIG. 5 is a diagram for explaining the main parts of the X-ray detector according to the present invention. In FIG. 5, 6 and 7 are the electrode plates explained in FIGS. 6 and 4. , a solder layer 10 is provided. 11 and 12 are flat plates, and these two flat plates are provided facing each other, and the electrode plates 6 and 7 are arranged and fixed between them as shown in FIG. 1. On one side of the flat plate 11, there is an electrode pattern ll as shown in FIG.
A is provided. This electrode pattern lla is the first
Similarly, the electrode plates are provided in accordance with the pitch at which each electrode plate is arranged. Therefore, when the electrode plates 6 and 7 are arranged at a predetermined interval, as shown in FIG.
matches. Then, when the solder layer and the electrode pattern lla are heated while they are aligned (in contact), both are soldered and fixed at that portion.

Note that although no explanation has been given above regarding the means for joining each of the electrode plates 6, 7 and the flat plate 12, in the present invention, this means that the means for joining each of the electrode plates 6, 7 and the flat plate 12 This is because there are no particular limitations on this. For example, some of the means for joining each of the electrode plates 6, 7 and the flat plate 12 are as follows: (a) A simple flat plate 12 and each of the electrode plates 6, 7 are bonded and fixed with an adhesive.

←) The electrode pattern lla is applied to the flat plate 12 in the same way as the flat plate 11.
The electrode plates 6 and 7 are fixed to each other by soldering. In this case, each electrode plate 6.
The No. 7 layer must also be provided on the side opposite to the side on which the No./Der layer 10 of FIG. 3 is provided.

With the above configuration, the electrode plates 6 and 7 are arranged and fixed between the flat plates 11 and 12. Then, each electrode plate 6, 7 is connected to each electrode pattern 11 of the flat plate 11.
This makes it easy to send and receive signals via each electrode pattern lla.

6 and 7 are diagrams for explaining one means for assembling the flat plate 11, 12 and the electrode plates 6, 7 as described above. In FIGS. 6 and 7, 13 and 14 are blocks constituting a jig. The blocks 13 and 14 each have grooves A1. A2. ,,, and B1
+821'' is provided, and the electrode plates 6 and 7 can be inserted into this groove as shown in Figs. 6 and 7.The two blocks 13 and 14 are fitted at the 0 part. As shown in FIG. 7, after assembling the jigs and tools, the flat plate 11 and each electrode plate 6,
7 and the flat plate 12 are set, and then heated by an appropriate method to solder the electrode pattern lla of the flat plate 11 and each electrode plate 6, 7. Of course, the flat plate 12 and each electrode plate 6, 7 are joined by the above-mentioned means or other means.

Each electrode plate 6゜7 assembled as in this 7th lesson is
When removed from the jig, the arrangement is as shown in FIG. 1.0 As described above, according to the present invention, the lead wires
Since electrical wiring can be made to each electrode plate without going through the cable, the wiring time is greatly reduced, and there is no need to worry about breaking or shorting thin lead wires, producing a highly reliable X-ray detector. I can do it.

Further, since electrical wiring and electrification of the adhesive surface are simultaneously performed by soldering the flat plate 11 and each of the electrode plates 6 and 7, the time required for assembling the X-ray detector can be shortened.

[Brief explanation of drawings]

Figure 1 is a partially cutaway view of the case to show an example of the external appearance and internal structure of the X# detector, which is known in the past and will be used in the present invention, and Figure 2 is a diagram showing the conventional electrode. FIGS. 5 and 4 are diagrams showing an example of electrical connection of the plates, FIGS. 5 and 4 are diagrams showing an example of the electrode plate used in the present invention, and FIG. The figures shown, Figures 6 and 7
The figure shows one means for assembling a flat plate and an electrode plate. DESCRIPTION OF SYMBOLS 1... Case, 2... X-ray detection gas, 6... Front part, 6... Signal electrode plate, 7... Common electrode plate, 10
...Solder layer, 11.12...Flat plate, lla...
Electrode pattern, 13.14...Jig tool block. Figure 1 Figure M2 Figure 3 Figure 6 cBr7

Claims (1)

[Scope of claims] In the X-ray detector, a large number of spatially partitioned detection compartments are configured in the case, and X-ray energy incident on the detection compartments is detected by a current flowing through a signal electrode. a pair of flat plates provided in the interior and arranged facing each other so as to hold a signal electrode plate and a common electrode plate, the pitch at which the signal electrode plate and the common electrode plate are arranged on at least one of the flat plates; A solder layer is provided on at least one side of the signal electrode plate and the common electrode plate, and the signal electrode plate is attached to the electrode pattern of the flat plate by heating. An X-ray detector characterized in that said one side portion of the common electrode plate is soldered.