JP2023109953A - X-ray detection device and X-ray imaging device - Google Patents

Abstract

To provide an X-ray detection device that facilitates a positioning and alignment work and can improve positioning accuracy, and to provide an X-ray radiographic apparatus.SOLUTION: An X-ray detection device includes: a detection surface in which a detection element for detecting an X ray is disposed in a flat surface shape; and a light-emitting part disposed around the detection surface to emit light. The light-emitting part is disposed in a symmetrical manner relative to a central line passing through a central position of the detection surface, for example. The light-emitting part is an LED, for example. Or, the light-emitting part is an organic EL, for example.SELECTED DRAWING: Figure 2A

Description

The present invention relates to an X-ray detection device and an X-ray imaging device.

For example, it includes an X-ray tube that generates X-rays, a table on which an object (for example, a patient) is placed, and an X-ray detector arranged opposite the X-ray tube across the object. An X-ray imaging apparatus is known (see Patent Document 1, for example).

The subject moves to an imaging room with an X-ray imaging apparatus. The operator (eg, radiologist) need only position the subject. The reason is that the positional relationship between the X-ray tube and the X-ray detection unit is predetermined.

In some cases, the subject cannot be moved to the imaging room. As an X-ray imaging apparatus used in such a case, there is known a mobile inspection vehicle that can be moved to the subject's room (see, for example, Patent Document 2).

An X-ray plane detector (Flat Panel Detector: FPD) that detects X-rays emitted from an X-ray tube is used for X-ray imaging by a mobile inspection car.

JP 2010-134295 A Japanese Patent Application Laid-Open No. 2003-220032

By the way, in X-ray imaging using a mobile inspection car, the FPD is placed between the subject and the bed. That is, the operator needs to align the FPD and the subject.

However, since the FPD is placed behind the subject, the operator needs to align the FPD and the subject while the FPD is difficult to see. As a result, not only is the alignment work difficult, but there is a risk that the accuracy of alignment will be reduced. It should be noted that a decrease in alignment accuracy is a factor in increasing the frequency of re-imaging.

A method of detecting the position and tilt of the FPD by arranging a device that generates a magnetic field around the FPD and analyzing the generated magnetic field in order to assist the alignment of the FPD and the subject is known. there is However, the surrounding environment is limited because the generation of the magnetic field is highly dependent on the surrounding environment such as the bed frame. In addition, an increase in the weight of the FPD, an increase in the size of the FPD, and the like may make the alignment work difficult.

SUMMARY OF THE INVENTION An object of the present invention is to provide an X-ray detection apparatus and an X-ray imaging apparatus that facilitate positioning work and improve positioning accuracy.

In order to achieve the above object, the X-ray imaging apparatus of the present invention comprises:
an X-ray generator that generates X-rays;
an X-ray detection unit arranged in a direction opposite to the X-ray generation unit with respect to a subject and detecting X-rays;
a subject imaging unit that images the subject;
a light emitting unit arranged in the X-ray detection unit and emitting light;
a leakage light detection unit that detects leakage light from the light emitting unit that leaks from behind the subject to the X-ray generation unit;
an extraction unit for extracting a leakage light pattern indicating a predetermined light intensity from the detected leakage light;
a center position detection unit that detects a center position of the X-ray detection unit based on the extracted leakage light pattern;
with
Information regarding the position of the subject and the center position of the X-ray detection unit is notified based on the imaged subject and the detected center position of the X-ray detection unit.
Further, the X-ray imaging apparatus in the present invention is
an X-ray generator that generates X-rays;
an X-ray detection unit arranged in a direction opposite to the X-ray generation unit with respect to a subject and detecting X-rays;
a subject imaging unit that images the subject;
a light emitting unit arranged in the X-ray detection unit and emitting light;
a leakage light detection unit that detects leakage light from the light emitting unit that leaks from behind the subject to the X-ray generation unit;
an extraction unit for extracting a leakage light pattern indicating a predetermined light intensity from the detected leakage light;
a learning unit that stores the extracted leakage light pattern;
a center position detection unit that detects a center position of the X-ray detection unit based on the extracted leakage light pattern;
with
When the center position is stored in the center position detection unit, the light leakage pattern extracted by the extraction unit is compared with the light leakage pattern stored in the learning unit to determine the position of the subject. The center position of the X-ray detection unit is detected, and information on the center position is notified.

According to the present invention, the alignment work can be facilitated and the accuracy of alignment can be improved.

A diagram schematically showing a rounding car FIG. 2 is a plan view of the FPD according to the embodiment of the present invention as seen from the front side; Diagram showing the light intensity of the light emitting part along the horizontal direction 1 is a block diagram showing the configuration of an X-ray imaging apparatus according to an embodiment of the present invention; A diagram showing a leaked light pattern indicating a specific light intensity of the leaked light from behind the subject. FIG. 4 is a diagram for explaining detection of the center position of the FPD in the X direction; A diagram showing a leaked light pattern indicating a specific light intensity of the leaked light from behind the subject. A diagram for explaining the detection of the tilt of the FPD about the Z-axis. A diagram showing the intensity of leaked light from behind the object FIG. 4 is a block diagram showing the configuration of an X-ray imaging apparatus according to modification 1; FIG. 11 is a block diagram showing the configuration of an X-ray imaging apparatus according to modification 2; Diagram showing respective tilts of the FPD around the X-axis, Y-axis and Z-axis Diagrams showing respective tilts of the FPD and X-ray tube around the X-axis, Y-axis and Z-axis A diagram showing the tilt of the FPD and the X-ray tube around the X-axis

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In this embodiment, an X-ray imaging apparatus 1 configured by a mobile inspection vehicle 2 and a portable X-ray detection apparatus 100 (FPD) will be described. FIG. 1 is a diagram schematically showing the medical vehicle 2 and the FPD 100. As shown in FIG.

As shown in FIG. 1, the medical vehicle 2 is equipped with an X-ray tube 3 and a console 4 (corresponding to the "informing section" of the present invention). The rounds vehicle 2 can be moved to an operating room, an intensive care unit (ICU), or the like. The FPD 100 is used for X-ray imaging by the medical vehicle 2 .

FPD 100 is inserted between subject 10 and bed 20 . The operator aligns the FPD 100 and the subject 10 . In the present embodiment, alignment between the FPD 100 and the subject 10 means matching the position of the subject 10 and the center position of the FPD 100 .

Also, the operator aligns the FPD 100 and the X-ray tube 3 . In the present embodiment, alignment between the FPD 100 and the X-ray tube 3 means matching the inclination of the X-ray tube 3 and the inclination of the FPD 100 (making the X-ray tube 3 and the FPD 100 face each other). In this embodiment, it is assumed that the position of the X-ray tube 3 and the center position of the FPD 100 are aligned.

The X, Y and Z axes are depicted in FIG. In the following description, the horizontal direction in FIG. 1 is called the X direction or horizontal direction, the left direction is called "+X direction" or "left side", and the right direction is called "−X direction" or "right side". Further, the vertical direction in FIG. 1 is called the Y direction or the front and back direction, the upward direction is called "+Y direction" or "front side", and the downward direction is called "−Y direction" or "back side". In FIG. 1, the direction orthogonal to the paper surface is called the Z direction or vertical direction, the front direction is called the "+Z direction" or "front side", and the back direction is called the "-Z direction" or "back side".

In this embodiment, the FPD 100 includes, in order from the front side (+Y direction), an upper cover 110, a scintillator layer 120 (see FIG. 2A), an X-ray detection element (not shown), a substrate (not shown), a support ( not shown) and a lower cover 130 are provided. The scintillator layer 120 converts x-ray energy into light. The X-ray detection elements detect light from the scintillator layer 120 . X-ray detection elements are arranged on the back side (−Y direction) of the scintillator layer 120 .

In addition, in the present embodiment, the upper surface of the scintillator layer 120 is referred to as a "detection surface". In addition, the outer frame 112 of the upper cover 110 is defined as "periphery of the detection surface". In the following description, the lateral (X-direction) central axis of the detection surface 120 is referred to as the "lateral central axis". Further, the longitudinal (Z-direction) center axis of the detection surface 120 is referred to as a “vertical center axis”.

FIG. 2A is a plan view of the FPD 100 viewed from the front side. As shown in FIG. 2A, the perimeter 112 of the sensing surface 120 has a left edge 114L, a right edge 114R, a near side edge 114F and a far side edge 114B. The left edge 114L is arranged on the left side of the horizontal central axis A1 and extends in the vertical direction. The right edge 114R is arranged on the right side of the horizontal center axis A1 and extends in the vertical direction. The left edge 114L and the right edge 114R are arranged symmetrically with respect to the lateral central axis A1.

The front side edge 114F is arranged on the front side of the vertical center axis A2 and extends in the horizontal direction. The back side edge 114B is arranged on the back side of the vertical center axis A2 and extends in the horizontal direction. The front side edge 114F and the back side edge 114B are arranged symmetrically with respect to the vertical central axis A2.

The FPD 100 has a light emitting section 140 . The light emitting units 140 are arranged around the periphery 112 of the detection surface 120 so as to emit surface light. The light emitting unit 140 is, for example, a light emitting diode (LED) or an organic electro luminescence (OEL). A diffusion plate is arranged on the upper surface side of the light emitting unit 140 . The directivity of LED is stronger than that of organic EL. Therefore, the diffuser plate is effectively used to diffuse the LED light.

The left light emitting portion 140L arranged on the left edge 114L is arranged on the entire front surface of the left edge 114L.

The right light emitting portion 140R arranged on the right edge 114R is arranged on the entire front surface of the right edge 114R.

The front side light-emitting portion 140F arranged on the front side edge 114F is arranged on the entire front surface of the front side edge 114F.

The far side light emitting portion 140B arranged on the far side edge 114B is arranged on the entire surface of the far side edge 114B.

The light emitting units 140 are arranged symmetrically with respect to a center line passing through the center position of the detection surface 120 . Specifically, the left light emitting portion 140L and the right light emitting portion 140R are arranged symmetrically with respect to the horizontal central axis A1. Also, the near side light emitting portion 140F and the far side light emitting portion 140B are arranged symmetrically with respect to the vertical central axis A2.

As shown in FIG. 3 , the medical cart 2 includes a leaked light detector 210 , an extractor 220 , a center position detector 230 , and an inclination detector 235 .

The leaked light detector 210 is arranged on the X-ray tube 3 side (see FIG. 1). The leaked light detection unit 210 is, for example, an image sensor such as a CCD. The leaked light detector 210 generates an electrical signal according to the light intensity of the light emitter 140 .

In this embodiment, the leaked light detection unit 210 is arranged above the subject 10 (+Y direction). Diffused light and surface light emitted from the light emitting unit 140 cause leakage light from behind the subject 10 . The leaked light detection unit 210 detects leaked light from behind the subject 10 .

FIG. 2B is a diagram showing the light intensity of the light emitting unit 140 along the lateral direction (X direction) when there is no shielding object such as the subject 10 on the front side (+Y direction) of the FPD 100 . Positions a, b, c, d, e, f, and m shown in FIG. 2B correspond to positions a, b, c, d, e, f, and m in the lateral direction shown in FIG. 2A. Position a is the position of the left end (left edge 114L) of the left light emitting portion 140L. Position b is the right end position of the left light emitting section 140L. Position c is the position of the left end of the right light emitting section 140R. Position d is the position of the right end (right edge 114R) of the right light emitting portion 140R. Position m is the center position of PDF 100 .

As shown in FIG. 2A, the regions between ab and cd are the regions of highest light intensity. These areas are areas corresponding to the light emitting section 140 . FIG. 2A shows a left leaked light pattern PLL and a right leaked light pattern PLR showing specific light intensities of leaked light from the left light emitting unit 140L, the right light emitting unit 140R, the near side light emitting unit 140F, and the far side light emitting unit 140B. , a front-side leakage light pattern PLF, and a back-side leakage light pattern PLB.

The area on the left side (+X direction) of the position a is an area showing the light intensity of the leaked light on the left light emitting section 140L side. Further, the area on the right side (−X direction) of the position d is an area showing the light intensity of the leaked light from the right light emitting section 140R side. As shown in FIG. 2B, the light intensity of the leaked light from the left light emitting section 140L decreases from position a toward the left. Also, the light intensity of the leaked light from the right light emitting section 140R side decreases from the position d toward the right side. The specific light intensity at a position a distance L1 to the left of the position a and the specific light intensity at a position a distance L1 to the right of the position d are obtained from experimental results or simulations.

Alignment of the position of the subject 10 and the center position of the FPD 100 includes alignment in the X direction and alignment in the Z direction. In both alignments, the directionality is different, but the method of alignment is the same. Therefore, the alignment in the X direction will be described below, and the description of the alignment in the Z direction will be omitted.

In order to match the tilt of the FPD 100 and the tilt of the X-ray tube 3, there are tilt alignment around the X-axis and tilt alignment around the Z-axis. In both tilt alignments, the tilt axes are different, but the tilt alignment method is the same. Therefore, the tilt alignment around the Z-axis will be described below, and the description of the tilt alignment around the X-axis will be omitted.

FIG. 4 is a diagram showing a leaked light pattern showing a specific light intensity of the leaked light from behind the object 10 . FIG. 4 shows the case where the subject 10 is on the front side (+Y direction) of the FPD 100 . In this case, the extraction unit 220 extracts the left leaked light pattern PLL indicating a specific light intensity from the leaked light from the left light emitting unit 140L. The extraction unit 220 extracts a right leakage light pattern PLR indicating a specific light intensity from the leakage light from the right light emitting unit 140R.

The center position detector 230 detects the center position of the FPD 100 in the X direction based on the left leaked light pattern PLL and the right leaked light pattern PLR.

Detection of the center position of the FPD 100 in the X direction by the center position detection unit 230 will be described with reference to FIG. As shown in FIG. 5, the position (the position of the left edge 114L) spaced to the right by a distance L1 from the left leakage light pattern PLL is defined as Pa. Let Pd be the position (the position of the right edge 114R) spaced to the left from the right leakage light pattern PLR by a distance L1. Accordingly, the center position Pm of the FPD 100 in the X direction is represented by the following formula (1).
Pm=(Pa+Pd)/2 (1)

Next, relative inclination detection between the X-ray tube 3 and the FPD 100 will be described with reference to FIG. FIG. 6 is a diagram showing a leaked light pattern showing a specific light intensity of the leaked light from behind the object 10 . The tilt detector 235 detects whether the left leaked light pattern PLL and the right leaked light pattern PLR are bilaterally symmetrical. As shown in FIG. 6, the tilt detector 235 detects that the X-ray tube 3 is tilted around the Z-axis with respect to the FPD 100 when the left leaked light pattern PLL and the right leaked light pattern PLR are asymmetrical. do.

Next, detection of the relative tilt angle between the X-ray tube 3 and the FPD 100 will be described with reference to FIG. As shown in FIG. 7, let L3 be the distance between the left leaked light pattern PLL and the right leaked light pattern PLR. When there is no relative tilt around the Z-axis between the X-ray tube 3 and the FPD 100, the distance between the left leaked light pattern PLL and the right leaked light pattern PLR is the length L0 (design value) of the FPD 100 in the X direction. and two distances L1 (L0+2L1). Accordingly, the relative tilt angle θ between the X-ray tube 3 and the FPD 100 around the Z-axis is expressed by the following equation (2).
θ=cos ⁻¹ (L3/(L0+2×L1)) (2)

The tilt detector 235 detects a relative tilt angle θ between the X-ray tube 3 and the FPD 100 around the Z-axis based on the distance L3 between the left leaked light pattern PLL and the right leaked light pattern PLR.

The console 4 displays the center position of the FPD 100 in the X direction detected by the center position detector 230 and the relative tilt angle between the X-ray tube 3 and the FPD 100 detected by the tilt detector 235 .

The FPD 100 is used by being inserted between the subject 10 and the bed 20 in chest X-ray imaging by the mobile inspection car 2 . That is, the FPD 100 is hidden behind the subject 10 . The operator aligns the FPD 100 and the subject 10 . Insufficient alignment and a decrease in alignment accuracy can lead to an increase in the frequency of re-imaging.

According to the FPD 100 according to the above embodiment, the left light emitting portion 140L and the right light emitting portion 140R are arranged symmetrically with respect to the horizontal central axis A1. As a result, the operator can determine the presence or absence of lateral displacement of the FPD 100 with respect to the subject 10 based on the intensity of leaked light from the left light emitting unit 140L side and the intensity of leaked light from the right light emitting unit 140R side. Visual recognition is possible.

Next, positional displacement of the FPD 100 will be described with reference to FIG. FIG. 8 is a diagram showing the intensity of leaked light from behind the subject 10. As shown in FIG. As shown in FIG. 8, the leaked light from the left light emitting unit 140L side is strong and the leaked light from the right light emitting unit 140R side is weak. can be done.

According to the X-ray imaging apparatus 1 according to the above embodiment, the leaked light detection unit 210 detects leaked light from the light emitting unit 140 leaking from behind the subject 10 to the X-ray tube 3 side, and a center position detector 230 that detects the center position of the FPD 100 based on the leak light pattern; and the X of the FPD 100 detected by the center position detector 230. and a console 4 for notifying the central position of the direction. This allows the operator to easily align the position of the subject 10 with the center position of the FPD 100 in the X direction based on the notified center position of the FPD 100 in the X direction.

Next, a first modified example of the X-ray imaging apparatus 1 according to this embodiment will be described. Also in Modification 1, aligning the position of the X-ray tube 3 with the center position of the FPD 100 in the X direction will be described.

The X-ray imaging apparatus 1 according to the first modification includes a learning section 240, as shown in FIG.
For example, depending on the state in which room lighting is reflected by the FPD 100, it becomes difficult for the leaked light detector 210 to detect leaked light, which causes the center position detector 230 to erroneously detect the center position of the FPD 100 in the X direction. As a result, for example, the deviation between the position of the subject 10 and the center position of the FPD 100 in the X direction may exceed the allowable range. In this case, the center position of the FPD 100 in the X direction is corrected.

The learning unit 240 stores the leakage light pattern and the corrected center position of the FPD 100 in the X direction in association with each other.

The center position detection unit 230 compares the leakage light pattern extracted by the extraction unit 220 and the leakage light pattern stored in the learning unit 240, and if both leakage light patterns are similar, the learning unit The center position of the FPD 100 (corrected center position of the FPD 100) corresponding to the leakage light pattern stored in 240 is detected.

According to Modification 1 above, the center position of the FPD 100 is accurately detected regardless of the surrounding environment when the leaked light detection unit 210 detects the leaked light. Accuracy can be further improved.

Next, modification 2 will be described with reference to FIGS. 10 and 11A to 11C. FIG. 11A is a diagram showing respective tilts of the FPD 100 around the X-axis, the Y-axis, and the Z-axis. FIG. 11B is a diagram showing the respective tilts of the FPD 100 and the X-ray tube 3 around the X-axis, the Y-axis, and the Z-axis. FIG. 11C is a diagram showing tilts of the FPD 100 and the X-ray tube 3 around the X-axis.

Although the relative tilt angle between the X-ray tube 3 and the FPD 100 is detected by the tilt detector 235 in the above embodiment, the present invention is not limited to this. The X-ray imaging apparatus 1 according to Modification 2 includes a first angle sensor 310, a second angle sensor 320, an angle difference detection section 330, and a control section 340, as shown in FIG.

The first angle sensor 310 detects the tilt angle θx about the X-axis, the tilt angle θy about the Y-axis, and the tilt angle θz about the Z-axis of the FPD 100, as shown in FIG. 11A. A known sensor such as an acceleration sensor or a magnetic sensor is used as the first angle sensor 310 .

The second angle sensor 320 detects the tilt angle φx about the X-axis, the tilt angle φy about the Y-axis, and the tilt angle φz about the Z-axis of the X-ray tube 3, as shown in FIGS. 11A and 11B. Similar to the first angle sensor 310, a known sensor such as an acceleration sensor or a magnetic sensor is used as the second angle sensor 320. FIG.

The angle difference detection unit 330 detects the difference between the tilt angle θx about the X-axis of the FPD 100 detected by the first angle sensor 310 and the tilt angle φx about the X-axis of the X-ray tube 3 detected by the second angle sensor 320. Based on this, the tilt of the X-ray tube 3 about the X-axis with respect to the FPD 100 is detected.

The angle difference detection unit 330 detects the difference between the tilt angle θy about the Y axis of the FPD 100 detected by the first angle sensor 310 and the tilt angle φy about the Y axis of the X-ray tube 3 detected by the second angle sensor 320. Based on this, the tilt of the X-ray tube 3 about the Y-axis with respect to the FPD 100 is detected.

The angle difference detection unit 330 detects the difference between the tilt angle θz about the Z axis of the FPD 100 detected by the first angle sensor 310 and the tilt angle φz about the Z axis of the X-ray tube 3 detected by the second angle sensor 320. Based on this, the tilt of the X-ray tube 3 about the Z-axis with respect to the FPD 100 is detected.

The relative tilt between the FPD 100 and the X-ray tube 3 will be described below with reference to FIG. 11C. FIG. 11C is a diagram showing the tilt angle θz of the FPD 100 about the X-axis and the tilt angle φz of the X-ray tube 3 about the X-axis.

As shown in FIG. 11C, there is a difference between the tilt angle θx and the tilt angle φx (θx−φx=α), there is no difference between the tilt angle θy and the tilt angle φy (θy−φy=0), and the tilt angle θz and the tilt angle φz (θz−φz=0), the angle difference detector 330 detects the tilt α of the X-ray tube 3 with respect to the FPD 100 around the X axis. The control unit 340 causes the console 4 to notify the information of the inclination α of the X-ray tube 3 with respect to the FPD 100 . The operator tilts the X-ray tube 3 based on the notified information.

When θx−φx=0, θy−φy=0, and θz−φz=0, the controller 340 causes the console 4 to notify the information that the X-ray tube 3 is not tilted with respect to the FPD 100 .

According to Modification 2 above, the operator can directly face the X-ray tube 3 to the FPD 100 based on the relative inclination between the X-ray tube 3 and the FPD 100 .

Next, modification 3 will be described. In the above embodiment, the center position detector 230 detects the center position of the FPD 100 based on the leakage light pattern. If the X-ray tube 3 is not directly facing the subject 10, in other words, if the X-ray tube 3 is not directly above the subject 10, the leaked light detector arranged on the side of the X-ray tube 3 Since the leaked light leaking from behind the subject 10 cannot be detected from directly above, the leaked light pattern may be erroneously detected.

Therefore, the mobile inspection vehicle 2 in Modification 3 includes a subject imaging unit that captures an image of the subject 10 . The imaging surface of the subject imaging unit is oriented in the same direction as the X-ray irradiation surface of the X-ray tube 3 . To easily confirm whether or not a leaked light detection unit 210 can detect leaked light leaking from behind the object 10 from right above based on whether the object 10 is in the center of an image picked up by the object imaging unit. becomes possible. As a result, there is no fear of erroneously detecting a leakage light pattern.

According to Modification 3, by providing the subject imaging unit, erroneous detection of the leaked light pattern can be prevented, so that the position of the subject 10 and the center position of the FPD 100 can be more easily aligned. Become.

Note that the subject imaging unit in Modification 3 may be the leakage light detection unit 210 . In addition, the control unit 340 may cause the console 4 to notify guidance information for positioning the X-ray tube 3 directly against the subject 10 (positioning the X-ray tube 3 directly above the subject 10). .

In the above embodiment, the position of the X-ray tube 3 and the center position of the FPD 100 are assumed to match. By using the subject imaging unit in Modification 3, it is possible to easily match the position of the X-ray tube 3 and the center position of the FPD 100 . For the following reasons. By using the image of the subject 10 captured by the subject imaging unit, the X-ray tube 3 can be positioned directly above the subject 10 . The position of the subject 10 and the center position of the FPD 100 can be aligned based on the left leaked light pattern PLL and the right leaked light pattern PLR. This makes it possible to align the position of the X-ray tube 3 with the center position of the FPD 100 .

In the above-described embodiment and each modified example, the light emitting unit 140 is arranged symmetrically with respect to the lateral central axis A1, but the present invention is not limited to this. placed around. In this case, the center position detection section 230 detects the center position of the FPD 100 based on the predetermined arrangement position of the light emitting section 140 .

In addition, the above-described embodiments are merely examples of specific implementations of the present invention, and the technical scope of the present invention should not be construed to be limited by these. Thus, the invention may be embodied in various forms without departing from its spirit or essential characteristics.

REFERENCE SIGNS LIST 1 X-ray imaging device 2 rounding vehicle 3 X-ray tube 4 console 10 subject 20 bed 100 FPD
110 Upper cover 112 Outer frame 114B Back edge 114F Front edge 114L Left edge 114R Right edge 120 Detection surface (scintillator layer)
130 Lower cover 140 Light emitting unit 140B Back side light emitting unit 140F Front side light emitting unit 140L Left light emitting unit 140R Right light emitting unit 210 Leakage light detection unit 220 Extraction unit 230 Center position detection unit 235 Inclination detection unit 240 Learning unit 310 First angle sensor 320 Second angle sensor 330 Angle difference detection unit 340 Control unit

In order to achieve the above object, the X-ray detection device in the present invention
a surface on which X-rays are incident on a detection element that detects X-rays;
a plurality of light emitting units provided at the edge of the surface and arranged symmetrically with respect to a center line passing through the center position of the surface;
with
The light intensities of the plurality of light emitting parts arranged symmetrically with respect to the center line are substantially the same.

In order to achieve the above object, the X-ray detection device in the present invention
a surface on which X-rays are incident on a detection element that detects X-rays;
a plurality of light emitting units provided at the edge of the surface and arranged symmetrically with respect to a center line passing through the center position of the surface;
with
The light intensities of the plurality of light emitting parts arranged symmetrically with respect to the center line are substantially the same.

Claims (3)

an X-ray generator that generates X-rays;
an X-ray detection unit arranged in a direction opposite to the X-ray generation unit with respect to a subject and detecting X-rays;
a subject imaging unit that images the subject;
a light emitting unit arranged in the X-ray detection unit and emitting light;
a leakage light detection unit that detects leakage light from the light emitting unit that leaks from behind the subject to the X-ray generation unit;
an extraction unit for extracting a leakage light pattern indicating a predetermined light intensity from the detected leakage light;
a center position detection unit that detects a center position of the X-ray detection unit based on the extracted leakage light pattern;
with
Information regarding the position of the subject and the center position of the X-ray detection unit is reported based on the imaged subject and the detected center position of the X-ray detection unit. Line photography device. an X-ray generator that generates X-rays;
an X-ray detection unit arranged in a direction opposite to the X-ray generation unit with respect to a subject and detecting X-rays;
a subject imaging unit that images the subject;
a light emitting unit arranged in the X-ray detection unit and emitting light;
a leakage light detection unit that detects leakage light from the light emitting unit that leaks from behind the subject to the X-ray generation unit;
an extraction unit for extracting a leakage light pattern indicating a predetermined light intensity from the detected leakage light;
a learning unit that stores the extracted leakage light pattern;
a center position detection unit that detects a center position of the X-ray detection unit based on the extracted leakage light pattern;
with
When the center position is stored in the center position detection unit, the light leakage pattern extracted by the extraction unit is compared with the light leakage pattern stored in the learning unit to determine the position of the subject. An X-ray imaging apparatus that detects the center position of the X-ray detection unit and reports information on the center position. a first angle sensor that detects the tilt angle of the X-ray detection unit;
a second angle sensor that detects the tilt angle of the X-ray generator;
The X-ray generation unit and the X-ray detection based on the tilt angle of the X-ray detection unit detected by the first angle sensor and the tilt angle of the front X-ray generation unit detected by the second angle sensor. and an angle difference calculation unit that calculates the relative tilt angle with the part,
3. The X-ray imaging apparatus according to claim 1, wherein the inclination angle is notified.