JP2006288617A - X-ray sensor, x-ray irradiation device and x-ray diagnosis apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray sensor for receiving an X-ray, easily registering an X-ray irradiation range with a light receiving area without a fixing tool, to provide an X-ray irradiation device for applying X-rays of an irradiation range registered with the light receiving area of the X-ray sensor, and to provide an X-ray diagnosis apparatus, formed by combination of the X-ray sensor and the X-ray irradiation device. <P>SOLUTION: This X-ray diagnosis device includes: the X-ray irradiation device 1 having a movable arm capable of moving in rotation, an X-ray irradiation part for applying X-rays and a receiving part for receiving radio waves, which are mounted at the tip of the movable arm; and the X-ray sensor 3 having a radio wave transmitting source for transmitting a radio wave and receiving X-rays, wherein the light receiving part receives the radio wave transmitted from the radio wave transmitting source, and the X-ray irradiation device determines the orientation and position to maximize the intensity of received radio wave, and moves the movable arm in rotation to irradiate the X-ray sensor with X-ray from the X-ray irradiation part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an X-ray diagnostic apparatus that performs positioning between an X-ray irradiation apparatus and an X-ray sensor.

  In recent years, the technology for inspecting and diagnosing the inside of an object or the like using X-rays has utilized an electrical signal from one using a film with the development of a device technology such as a CCD image sensor or a CMOS image sensor. It has changed to those using X-ray sensors. Image data converted into a digital signal is formed from a signal obtained by the image sensor, and can be instantaneously displayed on a display device such as a CRT or a liquid crystal via a personal computer or the like. This digitization is widely used especially in the fields of industrial nondestructive inspection, medical treatment, and dentistry that perform a huge amount of inspection and diagnosis. The computerization can eliminate the hassle of developing work and developing solution processing work that has been using film, and with the development of various high-capacity storage media, space-saving and search function by converting to electronic data. Convenience such as efficiency improvement by becomes high.

  As an example of these, there is an intraoral X-ray sensor used in dentistry (see, for example, Patent Document 1).

  FIG. 8 is a schematic diagram showing an X-ray diagnostic apparatus using a conventional X-ray sensor. The X-ray irradiation apparatus 114 has a movable arm 113 that can be rotated and moved. An X-ray irradiation apparatus that irradiates X-rays is disposed at the tip of the movable arm 113. The X-ray sensor 115 is inserted into the oral cavity 112 of the patient 111 at the time of diagnosis, and has a photoelectric conversion element that receives X-rays and converts them into electrical signals. The control unit 117 is connected to the X-ray sensor 115, and is configured by an electronic circuit that converts an electric signal from the X-ray sensor 115 into image data and performs drive control of the X-ray sensor. The display device 118 is a monitor that is connected to the control unit 117 and displays image data converted by the control unit.

  The operation of this X-ray diagnostic apparatus will be described. The X-ray irradiation device 114 irradiates the X-ray 115 from the tip of the movable arm 113. The X sensor 116 receives X-rays that have passed through the diseased part, converts them into electrical signals, and sends them to the control unit 117. The control unit 117 performs signal processing on the received electrical signal, forms image data and sends it to the display device 118, and the display device 118 displays the received image data as an image. With this X-ray diagnostic apparatus, the dentist can immediately see the diseased part of the patient 111 without developing.

  However, when X-ray irradiation is performed, the X-ray sensor 116 that is the irradiation target is in the oral cavity of the patient 111 and thus cannot be seen by the operator, and it is difficult to accurately perform irradiation without removing the target. Therefore, there is no problem even if a little is removed by widening the irradiation range of the X-ray 115 output from the X-ray irradiation device 114 from the light receiving region of the X sensor 116 that receives the X-ray 115. An X-ray image can be obtained.

In recent years, however, the patient is being regulated so as not to be exposed to unnecessary X-rays, and the X-ray irradiation range and the light-receiving area of the X-ray sensor are required to match. Therefore, the X-ray irradiation range and the X-ray sensor are provided by fixing the positional relationship between the X-ray sensor 116 and the X-ray irradiation device 114 and including a fixing jig 119 that determines the direction of X-ray irradiation from the X-ray irradiation device 114. A configuration is considered in which the light receiving areas are matched.
JP 2004-105518 A

  However, it takes time to set the fixing jig 119 for each X-ray irradiation, and it is necessary to change the fixing tool 119 depending on the part to be imaged, and it may be difficult to use the fixing jig 119. is there.

  The present invention has been made to solve the above-described problems, and provides an X-ray sensor that receives X-rays that can easily align the X-ray irradiation range with the light-receiving region without using a fixing jig. For the purpose. Moreover, it aims at providing the X-ray irradiation apparatus which irradiates the X-ray of the irradiation range matched with the light reception area | region of an X-ray sensor. Furthermore, it aims at providing the X-ray diagnostic apparatus which combined the said X-ray sensor and X-ray irradiation apparatus.

  In order to solve the above-described conventional problems, a first X-ray sensor of the present invention includes a light receiving unit in which light receiving elements that receive X-rays and output a signal corresponding to the X-ray intensity are arranged, and the direction of the light receiving unit And a radio wave transmission source for transmitting a radio wave having directivity indicating. With this configuration, the position of the X-ray sensor can be notified.

  In the second X-ray sensor of the present invention, a scintillator that converts X-rays into light and a light receiving element that receives the light converted by the scintillator and outputs a signal corresponding to the intensity of the light are arranged. A light receiving unit and a radio wave transmission source for transmitting a directional radio wave indicating the direction of the light receiving unit are provided.

  In addition, the radio wave source can be arranged at a plurality of locations on a plane parallel to the planar light receiving surface of the light receiving section. The light receiving area of the X-ray sensor can be shown.

  Further, the light receiving unit may be constituted by a CCD image sensor or a CMOS image sensor.

  Moreover, it can also be set as the structure which has a radio wave transmission source control circuit which makes the said radio wave transmission source a radio wave transmission state, when the said light-receiving part will be in a drive state. With this configuration, the power consumption of the X-ray sensor can be reduced.

  Further, the X-ray sensor may be configured to be waterproof. With this configuration, the X-ray sensor can be used in the oral cavity.

  The X-ray irradiation apparatus according to the present invention includes an X-ray irradiation based on a reception unit that receives radio waves, a position variable X-ray irradiation unit that irradiates X-rays, and a radio signal received by the reception unit. And a position setting unit for controlling the position and orientation of the unit.

  Further, the radio wave receiving surface of the receiving unit may be arranged so as to be perpendicular to the X-ray direction irradiated by the X-ray irradiation unit.

  Further, the position setting unit may be configured to control the direction and positioning of the light receiving unit so that the reception intensity of the radio wave is maximized. With this configuration, the relationship between the direction of the light receiving unit and the X-ray irradiation can be made constant, and X-ray diagnosis can be performed efficiently.

  In addition, a configuration in which at least two receiving units for receiving radio waves are provided may be employed.

  The X-ray diagnostic apparatus of the present invention includes the X-ray sensor and the X-ray irradiation apparatus that receives radio waves from a radio wave transmission source of the X-ray sensor. With this configuration, X-ray diagnosis can be performed without giving unnecessary exposure to the patient.

  The X-ray diagnostic apparatus of the present invention includes the X-ray sensor and the X-ray irradiation apparatus, and each of the radio waves transmitted from at least two radio wave sources of the X-ray sensor The receiving part of the said X-ray irradiation apparatus which receives is characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, even if it does not use a fixing jig, the X-ray sensor which light-receives the X-ray which can align an X-ray irradiation range easily with a light reception area | region can be provided. Moreover, the X-ray irradiation apparatus which irradiates the X-ray of the irradiation range matched with the light-receiving area | region of an X-ray sensor can be provided.

  Hereinafter, embodiments of an X-ray diagnostic apparatus including an X-ray sensor and an X-ray irradiation apparatus according to the present invention will be described with reference to the drawings.

  First, the configuration of the X-ray diagnostic apparatus will be described. FIG. 1 is a schematic diagram showing a configuration example of the X-ray diagnostic apparatus according to the present embodiment. The X-ray irradiation apparatus 1 has a movable arm 8 that can be rotated and moved, and the movable arm 8 has an X-ray irradiation unit that irradiates the X-ray 2 on the tip thereof. The X-ray sensor 3 is composed of a photoelectric conversion element that is inserted into the oral cavity 7 of the patient 6 at the time of diagnosis and receives the X-ray 2 that has passed through the diseased part and converts it into an electrical signal. The control unit 4 is connected to the control unit 4 and the display device 5, and is composed of an electronic circuit that forms image data from the electrical signal sent from the X-ray sensor 3 and sends it to the display device 5. The display device 5 includes a CRT that displays image data as an image.

  Although illustration of the operation of the X-ray irradiation apparatus 1 is omitted, for example, an operation apparatus that can be set so that the X-ray 2 is irradiated only while a switch within a predetermined setting time is pressed. Done with. Alternatively, the operation may be performed using any other type of apparatus.

  Although the illustration of the device for operating the control unit 4 is also omitted, for example, the control unit 4 can be operated by remote operation using a personal computer to display X-ray image data on the display device 5. it can. Further, LAN communication may be used for communication between the personal computer and the control unit 4. In addition, a communication method using USB may be used and is not particularly limited. Further, a device for operating the control unit 4 may be integrated with the display device 5.

  Next, the X-ray sensor 3 will be described in detail. 2A is a front view of the X-ray sensor 3 and FIG. 2B is a cross-sectional view thereof. The light receiving unit 12 is formed on the substrate 15. As shown in FIG. 2B, the light receiving unit 12 has a two-layer structure in which a scintillator 13 is formed on the light receiving element 11, and can receive X-rays and convert them into electrical signals. The signal line 16 sends an electric signal converted by the light receiving unit 12 to the control unit 4 and receives power and a control signal from the control unit 4 for driving the light receiving element 11 and a radio wave source 14 to be described later. It is a transmission line. Two radio wave transmission sources 14 are elements that are arranged at diagonal positions outside the rectangular light receiving unit 12 on the substrate 15 and transmit radio waves having directivity in the direction of the light receiving surface of the light receiving unit 12.

  The scintillator 13 is a wavelength conversion element that converts X-rays into light having an intensity corresponding to the intensity of the X-rays. The light receiving element 11 is configured by a CCD image sensor, for example, and is a photoelectric conversion element that receives light converted by the scintillator 13 and converts it into an electric signal. The light receiving element 11 has a configuration in which pixels having a minimum pixel size (several μm to 100 μm) for detecting charges according to the intensity of received light are arranged in a planar shape. The detected charge is converted into a voltage according to the amount of charge and sent to the control unit 4. In this way, the X-ray sensor 3 receives X-rays that have passed through the affected area, and obtains X-ray data necessary for diagnosis.

  The radio wave transmission source 14 is capable of detecting the position of the X-ray sensor 3 to the X-ray irradiation device 1 that transmits a radio wave having a strong directivity and receiving the radio wave although the frequency of the radio wave is several kHz and the intensity is weak. To. The direction of the direction of the radio wave is perpendicular to the light receiving surface of the light receiving unit 12 and is a direction that exits from the light receiving unit 12. Note that the direction of directivity varies slightly depending on the position of the light receiving unit 12, so the direction of directivity of radio waves is not limited to the above direction.

  The light receiving element 11 is not limited to a CCD image sensor, and may be a CMOS image sensor.

  For example, CsI can be used as the scintillator 13 that converts X-rays into light, but other materials such as ZnS may be used as long as they exhibit the same properties. Alternatively, a photoelectric conversion element using CdTe having the property of directly converting X-rays into charges without using the scintillator 13 may be used. Further, in order to prevent scattering of light converted by the scintillator 13, the periphery of each pixel of the light receiving element 11 can be surrounded by a fiber line to form a light shielding wall.

  The X-ray sensor 3 is preferably waterproofed by coating with, for example, resin. With this configuration, it can be used in the oral cavity. Moreover, you may make it the shape which match | combined the shape of the tooth | gear and the gum so that it might be fixed in the oral cavity.

  Next, the control unit 4 that controls the X-ray sensor 3 will be described in detail. FIG. 3 is a block diagram showing a configuration example of the control unit 4 of the X-ray diagnostic apparatus according to the present embodiment. The radio wave source control circuit 22, the CCD drive circuit 23 and the signal processing circuit 24 are connected to the X-ray sensor 3 and the I / F circuit 21, and the I / F circuit 21 is connected to the display device 5. The I / F circuit 21 communicates with the display device 5 and a control personal computer (not shown) of the control unit 4, transmits X-ray image data to the display device 5, and receives control signals from the personal computer. Control circuit. The radio wave source control circuit 22 is a control circuit that performs radio wave transmission control on the radio wave source 14 of the X-ray sensor 3 based on a command from a personal computer.

  The CCD drive circuit 23 is a control circuit that controls the CCD image sensor that is the light receiving element 11 of the X-ray sensor 3 based on a command from the personal computer. As described above, the CCD image sensor is used for the light receiving unit, but a CMOS image sensor may be used. In this case, a CMOS drive circuit is used instead of the CCD drive circuit 23. The signal processing circuit 24 includes an A / D converter, and converts a reception signal transmitted from the X-ray sensor 3 into digital data for each pixel signal of the X-ray sensor 3 to construct X-ray image data. It is. The image memory 25 is a storage device that is connected to the signal processing unit 24 and the I / F circuit 21, stores the X-ray image data digitized by the signal processing unit 24, and sends it to the I / F circuit 21.

  Note that a configuration may be employed in which the signal digitized by the signal processing circuit 24 is sequentially transmitted from the I / F circuit 21 to the display device 5 without using the image memory 25. Although not shown in FIG. 3, the control unit 4 includes a CPU and FPGA for controlling each circuit.

  Next, the X-ray irradiation apparatus 1 will be described in detail. FIG. 4 is a configuration diagram illustrating a configuration example of the X-ray irradiation apparatus 1. The X-ray irradiation apparatus 1 includes a movable arm 8 that rotates in a first axis rotation direction 34, a second axis rotation direction 35, and a third axis rotation direction 36, and an X-ray irradiation unit 32 provided at the tip of the movable arm 8. And have. In the vicinity of the X-ray irradiation unit 32, a reception unit 31 that receives the radio wave 33 is disposed. The receiving unit 31 is a radio wave receiver that receives a radio wave 33 transmitted from the radio wave transmission source 14 of the X-ray sensor 3.

  FIG. 5 is a block diagram illustrating a configuration example of the X-ray irradiation apparatus 1 including an automatic direction adjustment unit 46 for controlling each rotation axis of the movable arm 8 of the X-ray irradiation apparatus 1. The first and second receiving units 31 are connected to an automatic direction adjusting unit 46 that performs rotational movement control of the movable arm 8. The X-ray irradiation control circuit 43 is a control circuit that generates a control signal that sets the timing of irradiation of the X-ray 2 and the length of irradiation, and is connected to the X-ray irradiation circuit 45. The X-ray irradiation circuit 45 is a drive circuit that irradiates the X-ray 2 with a control signal from the X-ray irradiation control circuit 43.

  The automatic direction adjustment unit 46 includes first to third axis control circuits 41 that perform control to rotate and move the movable arm 8 with respect to the first axis rotation direction 34, the second axis rotation direction 35, and the third axis rotation direction 36. The first to third axis motor drive circuit 42 that rotates the movable arm 8 and the position setting adjustment control circuit 44 that sets the position and orientation of the X-ray irradiation unit 32 are provided. The automatic direction adjustment circuit 46 may be included in the X-ray irradiation apparatus 1 or may be an external computer.

  Next, the operation of the X-ray diagnostic apparatus having the above configuration will be described. The X-ray sensor 3 is installed in the oral cavity 7 of the patient 6 when the operator shown in FIG. An operator transmits a control signal to the control unit 4 via a personal computer or the like, the I / F circuit 21 shown in FIG. 3 receives the signal, and the light receiving element 11 is sent from the CCD drive circuit 23 to the X-ray sensor 3. A driving signal for driving is transmitted. At this time, a signal for radiating radio waves from the radio wave source 14 is transmitted from the radio wave source control circuit 22 to the X-ray sensor 3.

  FIG. 6 is a timing chart showing each signal at this time. When an irradiation standby signal indicating that the X-ray irradiation apparatus 1 can irradiate X-rays is input as shown in FIG. 6A, the CCD image sensor is driven as shown in FIG. 6B. The CCD driving state is started. In addition to the CCD driving state, as shown in FIG. 6C, the radio wave source transmission start signal, which is a control signal for the radio wave source 14 to transmit radio waves, is turned on to inform the position of the X-ray sensor 3. At the same time, transmission of radio waves from the radio wave transmission source 14 is started.

  When the X-ray sensor 3 is in the CCD drive state, the radio wave transmission source 14 of FIG. 2 transmits a radio wave 33 with high directivity. The X-ray irradiation apparatus 1 is directed roughly from the outside of the patient 6 to the X-ray sensor 3 installed in the oral cavity 7 of the patient 6 by the operator. Further, the operator turns on an on / off switch for the automatic direction adjustment mode for performing the above-described position and orientation determination control. By entering the automatic direction adjustment mode, the position setting adjustment control circuit 44 shown in FIG. 5 generates a command for adjusting the position and orientation of the X-ray irradiation unit 32. Based on the command, the first to third axis control circuit 41 obtains the rotational movement amount of the movable arm 8 in each of the rotation directions 34 to 36 and sends it to the first to third axis motor drive circuit 42. The first to third axis motor drive circuits 42 rotate and move the movable arm 8 based on the rotational movement amount of the first to third axis control circuits 41. In this way, the X-ray 2 irradiated from the X-ray irradiation unit 32 is controlled so as to cover all of the light receiving unit 9 of the X-ray sensor 3 shown in FIG.

  The relationship between the movable arm 8 and the radio wave transmission source 14 in this operation will be described with reference to FIGS. 4, 5, and 7. FIG. 7 is a diagram showing the positional relationship between the movable arm 8 having the X-ray irradiation unit 32 at the tip and the radio wave transmission source 14. The signal received by the receiving unit 31 is indicated by the wavelength on the horizontal axis and the signal intensity on the vertical axis, and is shown below the corresponding diagram of the positional relationship between the movable arm 8 and the radio wave source 14. When the direction of the radio wave from the radio wave source 14 and the direction perpendicular to the light receiving unit 12, that is, the direction of irradiation by the X-ray irradiating unit 32 are not exactly opposite, the reception intensity of the received radio wave is small (FIG. 7A).

  From this state, the movable arm 8 is rotated forward or backward to recognize the direction in which the signal intensity of the received signal increases, and the movable arm 8 is rotated in that direction. When rotated, the angle of the direction of the radio wave and the angle of the direction of irradiation by the X-ray irradiation apparatus 1 are close to 180 °, so that the received signal becomes large (FIG. 7B). Further rotation causes the intensity of the received signal to decrease when the angle exceeds 180 ° (FIG. 7C). When the received signal begins to decrease, the rotation is stopped and returned to the opposite direction.

  This operation is repeated once or several times, and the position of the rotating shaft is determined at a position where the radio wave transmitted from the radio wave transmission source 14 becomes maximum as shown in FIG. 7B. This positioning adjustment is performed for all the rotation axes of the first axis rotation direction 34, the second axis rotation direction 35, and the third axis rotation direction 36 shown in FIG.

  In addition, as shown in FIG. 2, the radio wave source 14 is provided at two positions diagonally with respect to the light receiving element 11 on the same plane as the X-ray sensor 3, and the radio waves from the two radio wave sources are both maximum. Adjustment is performed on each rotating shaft so that

  This positioning operation is controlled in the automatic direction adjusting unit 46 as follows. The first and second receiving units 31 shown in FIG. 5 individually receive radio waves from the two radio wave transmission sources 14, and the position setting control circuit 44 checks the magnitude of the received radio waves. The rotation direction is instructed to the axis control circuit 41. The first to third shaft control circuits 41 cause the first, second, and third shaft motor drive circuits 42 to actually rotate the respective rotation shafts in accordance with the direction of the rotation direction. The control in each axis control circuit 42 is sequentially performed for each rotation axis and repeated a predetermined number of times. With this operation, when the patient 6 is irradiated with the X-ray 2 shown in FIG. 1, the X-ray 2 can cover the entire light receiving area almost at right angles to the surface of the X-ray sensor 3.

  In the present embodiment, the CCD image sensor is started after the irradiation standby signal is input. However, in some cases, the CCD image sensor may be always driven. In that case, only the radio wave source transmission start signal is turned on simultaneously with the input of the irradiation standby signal. The reason why the radio wave source transmission start signal is synchronized with the input of the irradiation standby signal is to transmit radio waves from the radio wave source 14 only when necessary, so as to eliminate wasteful power consumption. The transmission from the radio wave transmission source 14 may be always performed.

  Moreover, in this Embodiment, an example of the number of control axes and the number of radio wave transmission sources is shown, and the present invention is not limited to this number. Further, the position and orientation of the X-ray irradiation unit 32 are not limited to the method using the rotation of the movable arm 8, and a method using expansion and contraction of the movable arm 8 can also be used.

  Further, although not shown, an adjustment completion lamp for notifying the operator when the adjustment of each axis is completed can be provided, and the light can be turned on when the adjustment is completed. When the adjustment completion lamp is turned on, the operator can immediately start X-ray irradiation by pressing an X-ray irradiation button linked to the X-ray irradiation apparatus 1.

  Although the automatic adjustment mode may be turned off when the adjustment is completed, the on state may be maintained so that the patient 6 can follow the slight movement. At this time, since the patient 6 does not move greatly, a function for setting the range to be adjusted to the automatic adjustment mode may be provided. By providing this function, it is possible to prevent the movable arm 8 from moving greatly by automatic adjustment, and to avoid dangerous situations and accidents such as collision with people.

  In FIG. 2, the X-ray sensor 3 has two radio wave transmission sources 14 arranged diagonally outside the region of the light receiving element 11, but at least one radio transmission source 14 may be provided. It only has to be done.

  As described above, in the present embodiment, the direction of X-ray irradiation from the X-ray irradiation apparatus 1 is determined by the radio wave from the X-ray sensor 3, and the X-ray 2 is applied to unnecessary areas by irradiation. Irradiation can be suppressed, and the exposure dose of the patient can be suppressed.

  Note that this embodiment is merely an example, and the present invention is not limited to this example. For example, the X-ray sensor 3 may be used in a nostril or may be used for an object in which the position of the X-ray sensor 3 cannot be confirmed with the naked eye without being limited to the inside of the body.

  The present invention has an advantage in that it is possible to suppress irradiation of X-rays to an unnecessary area by determining the direction of X-rays irradiated by the X-ray irradiation apparatus by radio waves from the X-ray sensor and irradiating. As an X-ray diagnostic apparatus, it can be used in the medical industry.

The schematic diagram which shows the structure of the X-ray diagnostic apparatus which concerns on embodiment of this invention FIG. 4A is a plan view from the vertical direction with respect to the light receiving surface of the X-ray sensor according to the embodiment of the present invention, and FIG. The block diagram which comprises the control unit which concerns on this Embodiment The block diagram which shows the structure of the X-ray irradiation apparatus which concerns on this Embodiment The block diagram which shows the structure of the X-ray irradiation apparatus which concerns on this Embodiment Timing chart of (a) irradiation standby signal, (b) CCD driving state, and (c) radio wave source transmission start signal of X-ray diagnostic apparatus according to the present embodiment The figure which shows the intensity | strength of the radio wave which the radio wave from the X-ray sensor which concerns on this Embodiment and X-ray irradiation apparatus, and the X-ray irradiation apparatus receives Schematic diagram showing a conventional X-ray diagnostic apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 X-ray irradiation apparatus 3 X-ray sensor 4 Control unit 5 Display apparatus 8 Movable arm 11 Light receiving element 12 Light receiving part 13 Scintillator 14 Radio wave transmission source 15 Board | substrate 21 I / F circuit 22 Radio wave transmission source control circuit 23 CCD drive circuit 24 Signal processing Circuit 25 Image memory 31 Reception unit 32 X-ray irradiation unit 41 Axis control circuit 42 Axis motor drive circuit 43 X-ray irradiation control circuit 44 Position setting adjustment control circuit 45 X-ray irradiation circuit 46 Automatic direction adjustment circuit

Claims (12)

A light receiving section in which light receiving elements that receive X-rays and output signals corresponding to the X-ray intensity are arranged;
An X-ray sensor comprising: a radio wave transmission source that transmits a directional radio wave indicating a direction of the light receiving unit. A scintillator that converts X-rays into light;
A light receiving section in which light receiving elements that receive light converted by the scintillator and output a signal corresponding to the intensity of the light are arranged;
An X-ray sensor comprising: a radio wave transmission source that transmits a directional radio wave indicating a direction of the light receiving unit.   The X-ray sensor according to claim 1, wherein the radio wave transmission sources are arranged at a plurality of locations on a plane parallel to a planar light receiving surface of the light receiving unit.   The X-ray sensor according to any one of claims 1 to 3, wherein the light receiving unit is configured by either a CCD image sensor or a CMOS image sensor.   The X-ray sensor according to claim 1, further comprising: a radio wave source control circuit that sets the radio wave source to a radio wave transmission state when the light receiving unit is in a driving state.   The X-ray sensor according to any one of claims 1 to 5, wherein the X-ray sensor is waterproofed. A receiver for receiving radio waves;
An X-ray irradiation unit that is variable in position and emits X-rays;
An X-ray irradiation apparatus comprising: a position setting unit configured to perform direction control and positioning control of the X-ray irradiation unit based on a radio wave signal received by the reception unit.   The X-ray irradiation apparatus according to claim 7, wherein a surface of the reception unit that receives radio waves is disposed so as to be perpendicular to an X-ray direction irradiated by the X-ray irradiation unit.   The X-ray irradiation apparatus according to claim 8, wherein the position setting unit controls the direction and positioning of the receiving unit so that the reception intensity of the radio wave is maximized.   The X-ray irradiation apparatus as described in any one of Claims 7-9 provided with two or more receiving parts which receive an electromagnetic wave. The X-ray sensor according to any one of claims 1 to 6,
An X-ray diagnostic apparatus comprising: the X-ray irradiation apparatus according to claim 7, wherein the X-ray irradiation apparatus receives radio waves from a radio wave transmission source of the X-ray sensor. An X-ray sensor having a plurality of radio wave sources according to any one of claims 3 to 6,
An X-ray irradiation apparatus according to claim 10,
A plurality of receiving units of the X-ray irradiation device respectively receive radio waves transmitted from a plurality of radio wave transmission sources of the X-ray sensor,
The X-ray diagnostic apparatus, wherein the position setting unit controls the orientation and positioning of the plurality of receiving units so that reception intensity for receiving the radio waves is maximized.

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