JP2011143125A - Radiation image detecting system and cable for cassette - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect an appropriate radiation image by suppressing noise in image data. <P>SOLUTION: A cassette 130 has a magnetic body 132B connected to a ground system of an electric substrate 133 set within the cassette 130. A cable 150 includes magnets 151B to be attracted to the magnetic body 132B when the cassette 130 is connected to the cable 150, and a ground wire 152B connected to the magnets 151B and a ground part 201 of a console 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a radiation image detection system and a cable for cassette.

  In recent years, a digital radiography apparatus has been used as a method of irradiating a subject with radiation and detecting radiation transmitted through the subject to obtain a radiation image. As such a radiation imaging apparatus, there is a so-called FPD (Flat Panel Detector).

  As an example of an FPD, a plurality of detection elements are two-dimensionally arranged on a substrate, radiation that has passed through a subject is irradiated onto a phosphor (scintillator), and visible light that is emitted according to the amount of irradiated radiation is charged. There is one that obtains a radiographic image by reading the electric charge accumulated in the photoelectric conversion element by converting into the photoelectric conversion element. Such an FPD has immediacy that a radiographic image can be obtained immediately after imaging.

  As an example of a radiation imaging apparatus using an FPD, there is a technique described in Patent Document 1. In the radiation imaging apparatus described in Patent Document 1, when a radiation image is captured, an electronic cassette, which is a portable FPD, is first inserted between a patient and a bed and placed in an area to be captured. When the arrangement of the electronic cassette is completed, the cable is connected to the connection portion of the electronic cassette, and the electronic cassette is connected to the control device and the power supply device. The electronic cassette operates by receiving a control signal from the control device and power supply from the power supply device via the cable, and takes a radiographic image. After the radiographic image is taken, image data is transmitted from the electronic cassette to the control device via a cable.

JP 2003-144424 A

  In the technique described in Patent Document 1, the electronic cassette is connected to the control device and the power supply device via a cable, but if the ground system of the electric substrate of the electronic cassette is not properly grounded, There is a possibility that noise is generated in the image data and an appropriate radiation image cannot be detected. Further, a mechanism for grounding the ground system of the electric board is complicated. For example, when a separate grounding wire is provided in the electronic cassette, there is a possibility that the handling of the electronic cassette may be hindered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a radiographic image detection system and a cassette cable capable of detecting an appropriate radiographic image by grounding a cassette by a simple method and suppressing noise in image data.

In order to achieve the above object, a radiological image detection system according to the present invention comprises:
A portable radiation image detection cassette including a detection unit that outputs an electrical signal corresponding to incident radiation;
A cable for cassette that bears at least one of a power supply path or an electric signal transfer path to the radiation image detection cassette;
An external device connected to the cassette cable,
A radiation image detection system for detecting radiation emitted toward a subject and acquiring radiation image data,
The radiological image detection cassette includes a magnetic body connected to an earth system of an electric board installed in the radiological image detection cassette,
The cassette cable includes a magnet that is attracted to the magnetic body when the radiographic image detection cassette and the cassette cable are connected, and a ground wire connected to the magnet and a ground portion in the external device. It is characterized by having.

The cassette cable according to the present invention is
Connected to an external device and a portable radiation image detection cassette having a detection unit that outputs an electrical signal corresponding to the incident radiation, and at least one of a power supply path and an electrical signal transfer path to the radiation image detection cassette A cable for carrying the cassette,
When a cassette cable is connected to the radiation image detection cassette, a magnet that is attracted to a magnetic body connected to a ground system of an electric board installed in the radiation image detection cassette;
A ground wire connected to the magnet and a ground portion in the external device;
It is characterized by having.

  According to the radiation image detection system and the cable for cassette according to the present invention, it is possible to detect an appropriate radiation image by grounding the cassette by a simple method and suppressing noise in the image data.

It is the schematic which shows a radiographic image detection system. It is explanatory drawing which shows the connection state of a cassette and a cable. It is an expansion perspective view of a cable. It is an expansion perspective view of a cassette. It is explanatory drawing which shows the cross section of the state to which the connector of the cable shown in FIG. 3 and the connection part of the cassette shown in FIG. 4 were connected. It is explanatory drawing which shows simply the connection state between a cassette and a console. It is explanatory drawing which shows the cross section of a state when a connector moves.

[Outline of radiation image detection system]
FIG. 1 is a schematic diagram showing a radiological image detection system 1.

  The radiation image detection system 1 is a system that detects radiation irradiated toward the patient P and acquires radiation image data. As shown in FIG. 1, the radiation image detection system 1 includes a radiation imaging apparatus 10 surrounded by a broken line, a console (external device) 20, and a management server 30.

  The radiation imaging apparatus 10 surrounded by a broken line is an apparatus that captures a radiographic image related to the patient P using the supine imaging stand 120 (note that it may be a standing imaging stand instead of the supine imaging stand). . The radiation imaging apparatus 10 includes a radiation irradiating unit 110, a lying position imaging table 120, a cassette (radiation image detection cassette) 130, a cassette mounting unit 140, and the like.

  When the radiation irradiation unit 110 captures a radiation image, the radiation irradiation unit 110 irradiates the patient P lying on the supine photographing stand 120 based on a control signal of the console 20.

  The cassette 130 set on the lying position photographing stand 120 by being mounted on the cassette mounting unit 140 detects radiation that has been irradiated from the radiation irradiation unit 110 and transmitted through the patient P, and acquires radiation image data.

  The cassette 130 has a detection unit 131 (see FIG. 2) inside. The detection unit 131 has a plurality of detection elements arranged two-dimensionally on the substrate, and outputs an electrical signal corresponding to the radiation dose irradiated to the detection elements.

  The thickness in the radiation incident direction of the cassette 130 is preferably 16 mm or less, and is within the range of the size (15 mm + 1 mm and 15 mm-2 mm) in accordance with the standard (JIS Z 4905) for a conventional screen / film cassette. (The international standard corresponding to JIS Z 4905 is IEC 60406).

  The console 20 is a control terminal that mainly controls the operation of the cassette 130, acquires radiation image data output from the cassette 130, and performs image processing. The console 20 also supplies power to the cassette 130.

  The cassette 130 and the console 20 are connected by a cable (cassette cable) 150 having a connector 151 installed at the end. In the radiation imaging apparatus 10, a radiation image is captured in a state where the cassette 130 and the console 20 are connected by the cable 150.

  The radiation image data acquired by the cassette 130 is transferred to the console 20 through the cable 150. A control signal for the cassette 130 is transferred from the console 20 to the cassette 130 through the cable 150. Further, power for operating the cassette 130 is supplied from the console 20 to the cassette 130 through the cable 150. That is, the cable 150 in this embodiment is responsible for an electric signal transfer path and an electric power supply path.

  The management server 30 has a function of managing information related to radiation imaging.

  The console 20 and the management server 30 are connected to each other through a network N. Although not shown here, the radiological image detection system 1 includes an HIS (Hospital Information System) for centrally managing subject diagnosis information and accounting information, and an RIS (Radiology Information System) for managing radiological information and a network N. Connected through. The network N may be a communication line dedicated to the system, but is preferably an existing line such as Ethernet (registered trademark) because the degree of freedom of the system configuration is low.

[Connection between cassette and cable]
FIG. 2 is an explanatory diagram showing a connection state between the cassette 130 and the cable 150.

  The cassette 130 is provided with a detection unit 131 and a connection unit 132. The cable 150 includes a connector 151 and a cord 152, and the connector 151 is connected to the connection part 132 of the cassette 130. The connector 151 and the connection part 132 are connected by the attractive force of a magnet as will be described later. Hereinafter, the structure of the cable 150 and the connection part 132 and the structure in which the connector 151 and the connection part 132 are connected by the attractive force of the magnet will be described.

  FIG. 3 is an enlarged perspective view of the cable 150.

  As described above, the cable 150 is roughly composed of the connector 151 and the cord 152. The structure of the connector 151 and the cord 152 will be described in detail with reference to FIG.

  The connector 151 installed at the end of the cable 150 is mainly composed of an attracting member 151A, a magnet 151B, and a connector terminal 151C.

  The attracting member 151A is provided around the magnet 151B as shown in FIG. The attracting member 151A is a magnetic body (for example, iron, stainless steel, etc.) and has a function of shielding the magnetic field lines of the magnet 151B so as not to leak outside. Although not shown in FIG. 3, a part of the adsorption member 151 </ b> A is connected to the ground wire 152 </ b> B of the cord 152.

  The magnet 151B is attracted to the attracting member 151A, and is disposed above and below the plurality of connector terminals 151C. The magnet 151B is a neodymium magnet that generates a strong magnetic force, and the connector 151 and the connection portion 132 of the cassette 130 are firmly connected so that they cannot be easily detached. Further, the surface of the magnet 151B is coated with nickel and has high conductivity, and high electrical conductivity is ensured with the adsorption member 151A.

  The plurality of connector terminals 151C function as electrical signal transfer terminals and power supply terminals. The connector terminal 151C is a spring connector, and the tip of the connector terminal 151C is movable.

  The cord 152 is coupled to the connector 151 having such a structure. The cord 152 mainly includes a cable bundle 152A and a ground wire 152B.

  Although not shown in FIG. 3, each connector terminal 151 </ b> C is connected with a cable wire for electric signal transfer and a cable wire for power supply, and a plurality of cable wires are bundled to form a cable bundle 152 </ b> A. Yes.

  The ground wire 152B is for grounding the cassette 130 to the ground (more precisely, as will be described later with reference to FIG. 6), the ground system of the electric board 133 of the cassette 130 is connected to the ground portion 201 of the console 20. The cable bundle 152A is provided on the outer periphery. The ground wire 152B is made of a mesh-like metal wire.

  FIG. 4 is an enlarged perspective view of the cassette 130.

  A connecting portion 132 is installed at the end of the cassette 130, and the connecting portion 132 is mainly composed of a cassette terminal 132A and a magnetic body 132B.

  When the cassette 130 and the cable 150 are connected, the cassette terminal 132A is connected to the connector terminal 151C of the cable 150, and electrical signals are transferred and power is supplied through the cassette terminal 132A.

  A magnetic body 132B is installed around the cassette terminal 132A, and the magnetic body 132B is made of, for example, iron or stainless steel.

  FIG. 5 is an explanatory view showing a cross section in a state where the connector 151 of the cable 150 shown in FIG. 3 and the connecting portion 132 of the cassette 130 shown in FIG. 4 are connected.

  When the connector 151 is brought close to the connecting portion 132 of the cassette 130 to connect the cassette 130 and the cable 150, as shown in FIG. 5, the magnet 151B in the connector 151 is attracted to the magnetic body 132B in the cassette 130, and the magnet 151B. And the magnetic body 132B come into contact with each other. As a result, the tip of the connector terminal 151C contacts the cassette terminal 132A, and a power supply path and an electrical signal transfer path between the cassette 130 and the console 20 are formed. Thus, since the cassette 130 and the cable 150 are connected by the attractive force of the magnet 151B in the connector 151, the connection work between the cassette 130 and the cable 150 can be easily performed.

[Grounding the cassette]
As shown in FIG. 5, the cassette 130 and the cable 150 are connected by the attractive force of the magnet 151 </ b> B in the connector 151. However, when the cassette 130 and the console 20 are connected, the cassette 130 and the console 20 are at the same potential. As described above, the cassette 130 is grounded via the magnet 151B and the magnetic body 132B. This point will be described with reference to FIG.

  FIG. 6 is an explanatory diagram simply showing a connection state between the cassette 130 and the console 20.

  The configuration of each of the cassette 130, the cable 150, and the console 20 will be described. First, the cassette 130 is provided with an electric board 133 that controls the detection unit 131 and the like, and the ground system of the electric board 133 and the magnetic body 132B are connected. ing.

  In the cable 150 connected to the cassette 130, since the magnet 151B is attracted to the attracting member 151A (see FIG. 3) connected to the ground wire 152B, the magnet 151B and the ground wire 152B are connected via the attracting member 151A. Has been.

  The console 20 is provided with a grounding portion 201 that is grounded, and a grounding wire 152 </ b> B of the cable 150 is connected to the grounding portion 201.

  Accordingly, as shown in FIG. 5, when the cassette 130 and the cable 150 are connected by the attractive force of the magnet 151B, as shown in FIG. 6, the ground system of the electric board 133, the magnetic body 132B, the magnet 151B, and the ground wire 152B. The earth part 201 becomes conductive, the cassette 130 is grounded to the ground, and the cassette 130 and the console 20 are at the same potential.

  As described above, when the cassette 130 and the cable 150 are connected, if the cassette 130 is grounded via the magnetic body 132B and the magnet 151B, the potential becomes the same in a state where the cassette 130 and the console 20 are connected. Noise in the data can be suppressed and an appropriate radiation image can be detected. Further, since the cassette 130 is grounded only by attracting the magnet 151B and the magnetic body 132B, the grounding operation to the ground can be easily performed.

[Connector movable]
In the radiological image detection system 1 shown in FIG. 1, the cassette 130 is set on the cassette mounting unit 140 at the lower part of the supine position imaging stand 120, and the radiographic data transmitted through the patient P is detected to acquire radiographic image data. For example, a radiation image may be acquired for a patient who lies on a bed or the like and cannot move the body freely. In such a case, the cassette 130 is inserted between the patient and the soft bed and a radiographic image is taken. However, the cassette 130 is sandwiched between the patient and the bed, and the connecting portion 132 of the cassette 130 and the cable 150 are inserted. It is assumed that a load is applied to the contact with the connector 151. However, in this embodiment, the connection state between the connection part 132 of the cassette 130 and the connector 151 of the cable 150 is maintained by the attractive force of the magnet 151B. Hereinafter, this point will be described in detail.

  As shown in FIG. 5, the magnet 151B is attracted to the attracting member 151A, but as shown by the arrow in FIG. 5, the magnet 151B can slide along the attracting surface with the attracting member 151A (FIG. 5). The upper and lower magnets 151B shown in FIG.

  When the cassette 130 is inserted between the patient and the soft bed, the cassette 130 is sandwiched between the patient and the bed, and an external force is applied to the connector 151. As a result, for example, the connector 151 is moved from the state shown in FIG. 5 to the state shown in FIG. However, even if the state shown in FIG. 5 changes to the state shown in FIG. 7, the magnet 151B slides along the attracting surface with the attracting member 151A (the upper magnet 151B in FIG. 7 and the lower magnet 151B in FIG. 7 slides in the direction b from the state of FIG. 5), the magnet 151B and the magnetic body 132B are attracted, and the contact state between the connector terminal 151C and the cassette terminal 132A can be maintained. That is, since the magnet 151B is slidable along the attracting surface of the attracting member 151A, the magnet 151B and the magnetic body 132B are attracted regardless of the direction in which the connector 151 is moved, and the cassette 130 and the cable 150 are connected. The state can be maintained.

  As mentioned above, although this invention was demonstrated using embodiment shown in FIGS. 1-7, this invention is not limited to the said embodiment, There exists a change and addition in the range which does not deviate from the summary of this invention. Are also included in the present invention.

  In the present embodiment shown in FIG. 1, the cable 150 serves as a power supply path and an electric signal transfer path. However, the present invention is not limited to this, and the cable 150 is not limited to the power supply path or the electric signal transfer path. It is sufficient if it bears at least one of them. More specifically, for example, the cable 150 serves as a power supply path, but the transfer of the radiation image data may be performed by wireless transfer from the cassette 130 to the console 20, or the cable 150 may be connected to the radiographic image electricity. Although it is responsible for the signal transfer path, a rechargeable battery may be installed in the cassette 130, and the rechargeable battery may be charged with power by setting the cassette 130 in a cradle.

DESCRIPTION OF SYMBOLS 1 Radiographic image detection system 10 Radiation imaging apparatus 20 Console 30 Management server 110 Radiation irradiation part 120 Supine imaging stand 130 Cassette 131 Detection part 132 Connection part 132A Cassette terminal 132B Magnetic body 133 Electric board 140 Cassette mounting part 150 Cable 151 Connector 151A Adsorption Member 151B Magnet 151C Connector terminal 152 Code 201 Ground part

Claims (6)

A portable radiation image detection cassette including a detection unit that outputs an electrical signal corresponding to incident radiation;
A cable for cassette that bears at least one of a power supply path or an electric signal transfer path to the radiation image detection cassette;
An external device connected to the cassette cable,
A radiation image detection system for detecting radiation emitted toward a subject and acquiring radiation image data,
The radiological image detection cassette includes a magnetic body connected to an earth system of an electric board installed in the radiological image detection cassette,
The cassette cable includes a magnet that is attracted to the magnetic body when the radiological image detection cassette and the cassette cable are connected, and a ground wire connected to the magnet and a ground portion in the external device. A radiation image detection system comprising:   The radiation image detection system according to claim 1, wherein the magnet is coated with nickel.   The radiation image detection system according to claim 1, wherein the magnet is a neodymium magnet. Connected to an external device and a portable radiation image detection cassette having a detection unit that outputs an electrical signal corresponding to the incident radiation, and at least one of a power supply path and an electrical signal transfer path to the radiation image detection cassette A cable for carrying the cassette,
When a cassette cable is connected to the radiation image detection cassette, a magnet that is attracted to a magnetic body connected to a ground system of an electric board installed in the radiation image detection cassette;
A ground wire connected to the magnet and a ground portion in the external device;
A cassette cable characterized by comprising:   The cassette cable according to claim 4, wherein the magnet is coated with nickel.   The cassette cable according to claim 4 or 5, wherein the magnet is a neodymium magnet.

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