JP2007155563A - Radiological image detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a signal passing a wire connecting a radiological image detection module to a subsequent signal processing circuit from being influenced by an external noise or the like, and to mitigate a stress to a support member. <P>SOLUTION: The radiological image detection module M is connected electrically to the subsequent signal processing circuit 12 by a wire 18 passing a through hole 20 provided in the support member 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radiation image detection apparatus that transmits a signal output from a radiation image detection module installed on an upper part of a support member to a subsequent signal processing circuit installed below the support member through electric wiring.

  As a conventional radiographic image detection apparatus, a radiographic image detection module and a post-stage signal processing circuit are respectively provided above and below a support member (see, for example, Patent Documents 1, 2, and 3).

  Among these, the radiation image detection module includes a radiation detection element that detects a radiation image signal of an object in units of pixels, and an integrated circuit element that outputs an electrical signal corresponding to the radiation dose detected by the radiation detection element. ing.

  On the other hand, the post-stage signal processing circuit inputs the radiation dose information from the upper surface of the circuit board on which the radiation image detection module is mounted through the wiring passing through the upper surface and the side surface of the support member. Based on this radiation dose information, the post-stage signal processing circuit performs analog-digital conversion of signals, control of digital communication, and the like.

Further, the post-stage signal processing circuit is configured to display a grayscale image of an object on an image processing display device such as a computer connected to the post-stage signal processing circuit based on information obtained by processing the radiographic image configuration and the like. Generate the necessary signals.
US Pat. No. 6,033,003 US Pat. No. 6,403,964 B1 Japanese National Patent Publication No. 10-505469

  However, in the conventional radiation image detection apparatus as described above, since the wiring length from the upper surface of the circuit board to the subsequent signal processing circuit is large (long), signal crosstalk between adjacent wirings and external noise There is a problem that the quality of the radiation dose information signal propagated from the integrated circuit element to the subsequent signal processing circuit is deteriorated.

  In addition, there is a problem in that the support member may be thermally deformed due to thermal stress due to heat generation of the radiation image detection module.

  The present invention solves the conventional problems as described above, and a support member on which the radiation image detection module is placed is provided with a through hole, and the radiation image detection module and the subsequent signal processing circuit are connected to the through hole. An object of the present invention is to obtain a radiological image detection apparatus that can prevent deterioration of signals due to external noise or the like by passing through the wiring, and that can reduce the thermal stress acting on the support member.

  To achieve the above object, a radiological image detection apparatus according to the present invention supports a radiological image detection module in which a radiological detection element and an integrated circuit element are electrically connected, and a plurality of the radiological image detection modules on the upper part. And an image processing display device such as a computer connected to the apparatus based on the radiation dose signal output from the radiation detection image module and installed on the lower side of the support member. A post-stage signal processing circuit that performs configuration and analysis of a radiographic image of an object, and the radiographic image detection module and the post-stage signal processing circuit are electrically connected by wiring passing through a through-hole provided in the support member It is characterized by being made.

  With this configuration, the radiation image detection module and the subsequent signal processing circuit are electrically connected at the shortest distance by the wiring passing through the through hole without going around the upper surface or the side surface of the support member. For this reason, the induction | guidance | derivation to wirings, such as external noise, can be suppressed as much as possible, and the quality degradation of the signal which passes this wiring can be avoided.

  In addition, since a plurality of the through holes are provided in the support member, it is possible to prevent the support member from being deformed or broken due to heat stress by the heat generated by the radiation detection module. Durability can be improved.

  In the radiological image detection apparatus according to the present invention, the arrangement pattern of the through holes formed in the support member is a lattice shape.

  With this configuration, when the wiring is passed through the through hole, the radiation image detection module can be arranged in a lattice shape (tile shape) on the support member without gaps.

  In the radiological image detection apparatus according to the present invention, the arrangement pattern of the through holes formed in the support member is staggered.

  With this configuration, the distance between the through holes can be kept large on average, and the warping and twisting of the support member due to thermal stress and external force accompanying heat generation of the radiation image detection module can be suppressed.

  It is also possible to avoid the occurrence of signal crosstalk between the wirings passing through the through holes. Furthermore, each radiation image detection module can be arrange | positioned on a support member in the grid | lattice form (tile form) without a gap.

  The radiographic image detection apparatus according to the present invention is characterized in that each of the radiographic image detection modules is supported on an upper portion of the support member via a spacer integrated with the radiographic image detection module.

  The radiological image detection apparatus according to the present invention is characterized in that a spacer integral with the radiological image detection module has a positioning projection fitted into a positioning groove formed on the support member.

  With this configuration, the plurality of radiographic image detection modules can be accurately and orderly arranged on the support member without any gaps and at the determined positions by fitting the positioning protrusions with the positioning grooves.

  According to the present invention, the radiation image detection module and the post-stage signal processing circuit are electrically connected by the wiring passing through the through hole provided in the support member, so that the wiring does not pass through the upper surface and the side surface of the support member. Further, the wiring distance can be minimized by passing the through hole. For this reason, it is possible to suppress adverse effects such as external noise on the signal passing through each wiring as much as possible, and to effectively avoid the deterioration of the quality of the signal.

  Hereinafter, a radiological image detection apparatus according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a cross-sectional view conceptually showing a radiological image detection apparatus according to a first embodiment of the present invention. The radiological image detection apparatus A includes a radiological image detection module M, a support member 11, and a post-stage signal processing circuit 12.

  Among these, the radiation image detection module M is configured by electrically connecting the radiation detection element 13 and the integrated circuit element 14 and is installed on the circuit board 15. In FIG. 1, three radiation image detection modules M are shown in a state of being arranged horizontally.

  A plate-like spacer 16 having a predetermined thickness is bonded to a predetermined position on the lower surface of each radiation image detection module M via an adhesive layer 17. A positioning projection 16 a having the same shape and size is provided at the center of the lower surface of the spacer 16.

  In the radiation image detection module M, the radiation detection element 13 is made of, for example, a monolithic array type semiconductor. As this semiconductor, CdTe, CdZnTe, HgI2, etc. with high detection sensitivity of γ-rays are used. It is formed as follows.

  On the other hand, the integrated circuit element 14 functions to output an electrical signal corresponding to the radiation dose for each pixel based on radiation information detected by the radiation detection element 13 and output in units of pixels. A plurality of signal processing side pixel electrode pads are provided on an integrated circuit surface (upper surface) of the integrated circuit element 14.

  These signal processing side pixel electrode pads are respectively connected to those corresponding to the pixel electrode pads on the lower surface of the radiation detection element 13 by a flip chip bonding method. Further, the output signal of the integrated circuit element 14 is input from the circuit board 15 that derives the output of the integrated circuit element 14 through, for example, a thin line, to the subsequent signal processing circuit 12 through the wiring 18.

  A connector 23 is connected to the end of the wiring 18, and this connector 23 can be connected to a connector (not shown) on the post-stage signal processing circuit board 21 on which the post-stage signal processing circuit 12 is mounted. The wiring 18 is laid in one insulating sheet (flexible sheet) 18a.

  The support member 11 is made of, for example, a heat conductive metal such as aluminum, and a plurality of positioning grooves 19 are arranged on the upper surface at a predetermined interval. In these positioning grooves 19, projections 16 a provided on the spacer 16 can be fitted substantially densely.

  In addition, the support member 11 is formed with a slit 20 as a through hole at a position corresponding to a substantially edge portion of each radiation image detection module M. The upper end of the first rear-stage signal processing circuit board 21 standing vertically is fixed to the lower surface of the support member 11 in the vicinity of these slits 20, and the lower end of the first rear-stage signal processing circuit board 21 is horizontally arranged. The second rear signal processing circuit board 22 is fixed.

  The first rear signal processing circuit board 21 has a connector (not shown) for connecting the connector 23 at the end of each wiring 18 to the rear signal processing circuit 12, adjacent to the rear signal processing circuit 12. It is attached as follows. The first rear-stage signal processing circuit board 21 and the corresponding second rear-stage signal processing circuit board 22 are electrically connected via connectors 24 and 25 and wirings 26.

  The support member 11 is supported on a second post-stage signal processing circuit board 22 via a support 27, and the second post-stage signal processing circuit board 22 is provided with each of the first post-stage signal processing circuit boards. The support member 11 is supported via the substrate 21.

  In the radiation image detection apparatus A according to this embodiment, the radiation detection element 13 constituting the radiation image detection module M detects radiation in units of pixels and outputs a radiation image signal. The integrated circuit element 14 generates an electrical signal corresponding to the radiation dose for each pixel based on the radiation detection signal.

  This radiation dose signal is transmitted from the circuit board 15 to the subsequent signal processing circuit 12 via the wiring 18 and the connector 23 provided for each radiation image detection module M.

  The post-stage signal processing circuit 12 processes the signal obtained from the radiation image detection module M, and performs various processes such as analog-digital conversion of the signal. The second post-stage signal processing circuit board 23 functions to output the digitally processed signal to, for example, a display device (not shown).

  In the operation of the radiation image detection apparatus A as described above, signals from the radiation image detection module M are output to the post-stage signal processing circuit 12 via the wiring 18 that connects them at the shortest distance. For this reason, it can suppress that the said wiring 18 pulled out for every radiographic image detection module M induces the signal from the adjacent other wiring 18, and external noise.

  As a result, it is possible to prevent the quality of the signal transmitted from each radiation image detection module M to each subsequent signal processing circuit 12 from deteriorating.

(Second Embodiment)
FIG. 2 is a sectional view conceptually showing a radiation image detection apparatus A according to the second embodiment of the present invention.

  In the first embodiment, each second-stage signal processing circuit 12 is provided on each one second-stage signal processing circuit board 21 standing vertically for each radiation image detection module M. In the embodiment, each one subsequent signal processing circuit 12 corresponding to each radiation image detection module M is provided on one large subsequent signal processing circuit board 28 that is horizontally arranged. In this case, the support column 29 for supporting the support member 11 on the rear signal processing circuit board 28 can be shortened.

  Further, since the distance between each one of the radiological image detection modules M and the post-stage signal processing circuit 12 is reduced, the wiring 18 connected to the post-stage signal processing circuit 12 via the connector 23 can be further shortened. The thickness of the entire radiation image detection apparatus A including the support column 29 is reduced, and the radiation image detection apparatus A can be downsized and handled easily.

  FIG. 3 is an explanatory diagram showing a situation where the radiation image detection module M is installed on the support member 11. Here, the case where the spacer 16 does not have the positioning protrusion 16a on the lower surface will be described.

  The plurality of slits 20 are provided in the support member 11 in a predetermined shape, size, and arrangement. These slits 20 are rectangular with a large aspect ratio, and their arrangement is determined according to the size of the radiation image detection module M.

  Accordingly, by placing each of the radiological image detection modules M on the support member 11 so that the wiring 18 thereof passes through the slits 20, adjacent ones of the radiographic image detection modules M are shown in FIG. As shown in FIG. 4, they can be arranged in a grid without gaps.

  With such an arrangement without gaps, dead pixels can be reduced, and a large-area radiation image detection apparatus A in which a plurality of radiation image detection modules M are arranged can be formed.

  FIG. 5 shows an example in which the slits 20 having the same shape and the same size are arranged on the support member 11 in a staggered manner. Here, the case where the spacer 16 does not have the positioning protrusion 16a on the lower surface will be described.

  In this case, the horizontal distance between adjacent ones of the slits 20 can be greatly separated, and therefore the distance between the wirings 18 passing through these slits 20 can also be separated.

  Thereby, each slit 20 suppresses the curvature, the twist, etc. of the support member 11 by the heat | fever and external force which the radiation image detection module M generate | occur | produces. In addition, intrusion of external noise into each wiring 18 can be suppressed, and the occurrence of signal crosstalk between the wirings 18 can be avoided, and as a result, quality deterioration of the signal can be prevented.

  Also in this case, if the shape, size, and arrangement of each slit 20 are taken into consideration, when each radiation image detection module M is installed on the support member 11 through the wiring 18 through each slit 20, as shown in FIG. Can be arranged in a staggered pattern with no gaps.

  FIG. 7 is a perspective view showing an example in which the radiation image detection module M is mounted on the support member 11 having both the slit 20 and the positioning groove 19. In the support member 11, the positioning protrusion 16 a of the spacer 16 is fitted into the positioning groove 19 when the wiring 18 of the radiation image detection module M is inserted into the slit 20.

  Therefore, a plurality of radiographic images in which the positioning projections 16a are fitted in the positioning grooves 19 are designed by appropriately designing the shape, size, and arrangement of the radiation image detection modules M and the positioning projections 16a on the support member 11 in advance. As shown in FIG. 8, the detection module M is fixed in an accurate position on the support member 11 without any gaps and without being displaced.

  With the arrangement of the radiation image detection module M without such a gap, a radiation image of an object with few dead pixels can be detected (measured) and displayed on the display device.

  Even in this case, the wiring 18 can be connected through the slit 20 between the radiation image detection module M and the post-stage signal processing circuit 12 with the shortest distance. For this reason, it is possible to prevent the signal passing through the wiring 18 from being deteriorated by external noise or the like in the same manner as described above.

  FIG. 9 shows another configuration example in which a plurality of the radiation image detection modules M are installed on the support member 11. Here, two radiation image detection modules M are arranged side by side on one circuit board 15 having the size (area) of the two, and an adhesive layer 17 is provided on the lower surface of the circuit board 15. The spacer 16 having the same size as the circuit board 15 is integrally attached.

  In addition, signals taken out from the circuit board 15 for each of the two radiation image detection modules M are collected into the wiring 18 provided on one insulating sheet 18a and can be derived in a lump. Yes.

  Accordingly, the support member 11 is provided with a wiring 18 for collectively extracting signals taken out from the two radiation image detection modules M and a slit 20 through which the connector 23 can be inserted.

  The spacer 16 supporting the two radiation image detection modules M via the circuit board 15 is provided with one positioning projection 16a having a predetermined size, and a positioning groove 19 having a size suitable for the positioning projection 16a. The support member 11 is formed.

  Therefore, two radiation image detection modules M on one circuit board 15 are set as one set, and a plurality of sets (for example, 9 sets) are supported by passing the wiring 18 through the slit 20. By placing them on the member 11, adjacent ones of the radiation image detection modules M can be arranged in a lattice pattern without gaps as shown in FIG.

  With such an arrangement without gaps, dead pixels can be reduced, and a large-area radiation image detection apparatus A in which a plurality of radiation image detection modules M are arranged can be formed.

  Further, among the wirings corresponding to the two radiation image detection modules M, the number of overlapping circuit lines such as the power supply and the ground can be reduced, and the number of parts constituting the apparatus can also be reduced.

  Further, similarly to the above, the wiring 18 can be connected to the downstream signal processing circuit 12 through the slit in the shortest time.

  FIG. 11 shows another example in which the radiation image detection module M is installed on the support member 11. Here, four radiation image detection modules M are arranged side by side in one direction on one circuit board 15 having the size (area) of the four radiation images. A spacer 16 of the same size is integrally attached to the lower surface of the circuit board 15 via an adhesive layer 17.

  In addition, signals taken out from the circuit board 15 for each of the four radiation image detection modules M can be led out collectively by the wiring 18 provided on one insulating sheet 18b.

  Therefore, the support member 11 is provided with a slit 18 having a size capable of inserting the wiring 18 and the connector 23 that collectively derive signals extracted from the four radiation image detection modules M.

  The spacer 16 that supports the four radiation image detection modules M via the circuit board 15 is provided with one positioning projection 16a of a predetermined size, and a positioning groove 19 of a size that fits the positioning projection 16a is supported. It is formed on the member 11.

  Therefore, four radiation image detection modules M on one circuit board 15 are set as one set, and a plurality of sets (for example, six sets) are supported by passing the wiring 18 through the slit 20. By placing them on the member 11, adjacent ones of the radiation image detection modules M can be arranged in a grid pattern without gaps as shown in FIG.

  With such an arrangement without gaps, dead pixels can be reduced, and a large-area radiation image detection apparatus A in which a plurality of radiation image detection modules M are arranged can be formed.

  FIG. 13 is a block diagram showing a radiological image detection system having the radiological image detection apparatus A.

  In this figure, 31 is an object to be imaged, 32 is a radiation source, 34 is radiation such as X-rays and gamma rays generated by the radiation source 32, and 35 is transmitted radiation attenuated through the object 31. Incident on the radiation image detection apparatus A.

  Reference numeral 33 denotes an image processing display device having a function of processing a signal transmitted from the radiation image detection device A to image, store and display the signal.

  In this radiographic image detection apparatus A, pixel position information (X-axis and Y-axis information) and gray-scale information (Z-axis information) are obtained through conversion of the transmitted radiation 35 including the internal configuration information of the object 31 into an electrical signal and analog-digital conversion. Information) is obtained as described above, and each piece of information (digital signal) is sent to the image processing display device 33.

  In this image processing display device 33, based on the above information, the radiation amount measured for all the pixels is used as an image composition as a single-color density difference or hue difference, and the internal components in the measurement object are measured. The distribution state can be imaged.

  The radiological image detection apparatus according to the present invention can avoid the deterioration of the signal passing through the wiring connecting the radiographic image detection module and the subsequent signal processing circuit through the through hole due to the influence of external noise and the like, and the support member. This is useful for a radiation image detection apparatus that supplies a signal output from a radiation image detection module to a subsequent signal processing circuit installed under the support member by electrical wiring. It is.

It is sectional drawing which shows notionally the radiographic image detection apparatus by embodiment of this invention. It is sectional drawing which shows notionally the radiographic image detection apparatus by other embodiment of this invention. It is a perspective view which shows the supporting member with which the radiographic image detection module of FIG. 1 is mounted | worn. FIG. 4 is a perspective view showing a state where a radiation image detection module is mounted on the support member of FIG. 3. It is a perspective view which shows another support member with which the radiographic image detection module of FIG. 1 is mounted | worn. FIG. 6 is a perspective view showing a state in which a radiation image detection module is mounted on the support member of FIG. 5. It is a perspective view which shows another support member with which the radiographic image detection module of FIG. 1 is mounted | worn. FIG. 8 is a perspective view showing a state in which a radiation image detection module is mounted on the support member of FIG. 7. It is a perspective view which shows the other support structure with respect to the support member of the radiographic image detection module by this invention. It is a perspective view which shows the support state with respect to the support member of the radiographic image detection module in FIG. It is a perspective view which shows the other support structure with respect to the support member of the radiographic image detection module by this invention. It is a perspective view which shows the support state with respect to the support member of the radiographic image detection module in FIG. It is a block diagram which shows the radiographic image detection system containing the radiographic image detection apparatus of this invention.

Explanation of symbols

A radiation image detection apparatus M radiation image detection module 11 support member 12 subsequent signal processing circuit 13 radiation detection element 14 integrated circuit element 15 circuit board 16 spacer 16a positioning protrusion 17 adhesive layer 18 wiring 18a, 18b insulating sheet 19 positioning groove 20 slit ( (Through hole)
21, 22, 28 Subsequent signal processing circuit boards 23, 24, 25 Connectors 26 Signal cables 27, 29 Substrate fixing chassis 31 Target object 32 Radiation source 33 Image processing display device 34 Irradiation radiation 35 Transmission radiation

Claims (5)

A radiation image detection module in which a radiation detection element and an integrated circuit element are electrically connected, a support member that supports a plurality of the radiation image detection modules above, and a radiation image that is installed below the support member, A signal processing circuit that performs analog-to-digital conversion on a signal corresponding to the amount of radiation output from the detection module and controls communication of the digital signal, and the radiation image detection module and the signal processing circuit at the subsequent stage include the support member. A radiographic image detection apparatus, wherein the radiation image detection apparatus is electrically connected by a wiring passing through a through-hole provided in the antenna. The radiographic image detection apparatus according to claim 1, wherein an arrangement pattern of the plurality of through holes provided in the support member is a lattice shape. The radiation image detection apparatus according to claim 1, wherein an arrangement pattern of the plurality of through holes provided in the support member is a staggered pattern. The radiographic image detection apparatus according to claim 1, wherein a plurality of the radiographic image detection modules are supported in parallel on an upper portion of the support member via a spacer integrated with the radiographic image detection module. The radiographic image detection apparatus according to claim 4, wherein a spacer integrated with the radiographic image detection module has a positioning projection that can be fitted in a positioning groove formed on the support member.

Images