JP2008142265A - Screen for x-ray long-length photography, and radiographing apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen arranging a marker by generating no relative positional misalignment with an X-ray detecting means while preventing the X-ray detecting means from coming into contact with a subject and well connecting split images each other in long-length photography. <P>SOLUTION: A screen body 4 is constituted by keeping a pair of right and left support members 2 standing up on a support base 1 with an H shape and affixing a sheet 3 of a material transmitting X ray onto the support members 2. A vertically long casing 5 is attached to one of the support members 2, sprockets are rotatably pivoted inside of the same, and a chain is wound. The marker 9 is attached to the chain and is constituted so as to be able to vertically move along the sheet 3. A potentiometer is interlockingly coupled to the lower side sprocket via a speed reduction mechanism (not shown) and the screen is constituted so as to be able to detect the fixed position of the marker 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention uses an X-ray long-screening screen used when performing long-time photography such as whole spine photography and whole lower-limb photography with an X-ray imaging apparatus, and the X-ray long photography screen, A flat panel X-ray detector attached to a standing stand that irradiates the subject with X-rays by an X-ray irradiation means such as an X-ray tube that irradiates the subject with X-rays. The X-ray detection means such as the above, and a plurality of continuous imaging ranges for the subject are set, and the X-rays detected by the X-ray detection means in each imaging range are processed to obtain divided image data. The present invention relates to an X-ray imaging apparatus that collects and connects the image data to create long image data.

Conventionally, as this type of X-ray imaging apparatus, the following is known.
That is, an X-ray irradiation apparatus that irradiates the subject with X-rays is held by being suspended from the ceiling by the ceiling suspension holding apparatus. The ceiling suspension holding device is configured so that the X-ray irradiation device can be driven up and down and left and right.
An X-ray detection apparatus having a two-dimensional flat panel detector for detecting an X-ray signal transmitted through the subject is provided so as to face the X-ray irradiation apparatus with the subject interposed therebetween. This X-ray detection device is provided on a standing imaging stand so as to be movable in the vertical direction.

  The X-ray detection apparatus includes an image data collection apparatus that reads out an X-ray signal detected by a flat detector and collects image data, and performs various image processing on the image data collected by the image data collection apparatus to obtain a desired image data. An image processing apparatus for obtaining image data is connected.

  In the X-ray imaging apparatus configured as described above, when performing long imaging, a rubber band with markers around the trunk from the upper part of the abdomen, which is substantially the center of the long imaging range of the subject, to the back of the torso (Marker fixing tool) is wound and the flat detector positioning and image connection markers are mounted.

  After that, while observing the light irradiation range obtained by the light beam from the X-ray irradiation range confirmation projector in the X-ray irradiation device, the X-ray irradiation device is moved up and down to move the light beam from the X-ray irradiation device. An X-ray irradiation apparatus is disposed at a position where the center coincides with the center of the long imaging range of the subject. The X-ray irradiation apparatus is held at that position, and the marker is located at two locations within the width of the subject's back at the center of the long imaging range, that is, adjacent imaging in which the long imaging range is divided. It fixes in the overlap area provided in a part of ranges.

Next, the X-ray detector is moved so that the flat detector is disposed at a position in the imaging range where the upper half of the region of interest of the subject can be imaged, and the X-ray irradiation device is moved by the X-ray movable aperture device. The X-ray irradiation field is limited to the effective field of view of the flat panel detector, and X-rays are irradiated in that state to perform imaging of the upper half or more.
After that, the X-ray detection device and the X-ray irradiation device are moved to a position where imaging of the lower half or more is to be performed. The marker is imaged by irradiation with the X-ray dose, and the position of the marker from the upper end of the flat detector of the X-ray detection apparatus is calculated from the image data.

Since the size of the flat detector and the amount of movement of the X-ray detector and the X-ray irradiation device are known in advance, the length from the lower end of the flat detector of the X-ray detector to the marker at the time of imaging of the upper half or more Based on the value and the position of the marker from the upper end of the flat detector at the time of marker shooting, the lower end of the flat detector at the time of shooting when the length from the upper end of the flat detector to the marker is more than the upper half The amount of movement required to move the X-ray detection device and the X-ray irradiation device to a position equal to the length from the marker to the marker is calculated, and the X-ray detection device and the X-ray irradiation device are moved by the amount of the movement. Thus, the amount of distortion at the edge of the flat detector is set to be the same when shooting the upper half or more and when shooting the lower half or more.
Trimming the area below the marker from the image data obtained in the upper half or more obtained in this way, while trimming the area above the marker from the image data obtained in the lower half or more. The two image data are connected to obtain a single piece of long image data (see Patent Document 1).
JP 2006-141904 A

  However, in the case of the conventional example, since a rubber band with a marker is wound around the subject, there is a disadvantage that the subject becomes uncomfortable. In addition, even if it is very small, the marker is easy to move with the subject, and the relative position with respect to the flat panel detector is shifted, and there is a problem in that the image quality at the joint portion of the image data is lowered.

  The present invention has been made in view of the circumstances as described above, and can prevent relative displacement between the X-ray detection means and the X-ray detection means while preventing the X-ray detection means from contacting the subject. The purpose is to provide a partition that can be used to provide a screen that can connect the divided images well in long shooting, and that can be used to obtain a good long shot image. An object is to provide an apparatus.

In order to achieve the above object, the invention according to claim 1 has the following configuration.
That is, X-ray long imaging provided between an X-ray irradiation means for irradiating a subject with X-rays and an X-ray detection means attached to a standing stand and detecting X-rays transmitted through the subject. A partition,
A marker is provided on the partition main body so that the fixed position can be changed in the vertical direction.

(Action / Effect)
According to the configuration of the X-ray long imaging screen according to the first aspect of the invention, the X-ray detection means is used to be interposed between the X-ray detection means and the subject. When moving in the direction, the X-ray detection means can be prevented from contacting the subject.
Moreover, since the marker is provided on the partition main body so that the fixed position can be changed in the vertical direction, it is possible to avoid wrapping the rubber band with the marker around the subject as in the past, and to make the subject feel uncomfortable. There is nothing.
In addition, since the position of the marker can be changed without touching the subject while the subject remains in front of the screen body, the movement of the subject can be suppressed, and the position of the marker can be determined. Because it is not affected by the movement of the person and the relative position with respect to the X-ray detection means does not shift, the image quality at the joined portion of the image data does not deteriorate, and the divided images are joined together well in the long shooting. Can provide a screen that can

The invention according to claim 2
In the partition for X-ray long photography of Claim 1,
The partition body is provided with marker position detecting means for detecting a fixed position of the marker and outputting a position signal.
As the marker position detecting means, a potentiometer, a rotary encoder, or the like can be used.

(Action / Effect)
According to the configuration of the X-ray long image partition of the invention according to claim 2, since the marker fixed position can be detected by the marker position detection means provided in the partition main body, X-rays are irradiated for detecting the marker position. It is possible to provide a screen that can reduce the labor and time required for photographing and the exposure dose.
Further, it is not necessary to perform image processing for marker position detection, and it is possible to provide a screen that has a simple configuration and can reduce labor and time required for photographing.

The invention according to claim 3
In the screen for X-ray long photography according to claim 1 or 2,
The partition body is provided with a drive marker movably in the vertical direction, a marker drive mechanism for driving and driving the drive marker, and a drive marker position detecting means for detecting a fixed position of the drive marker.

(Action / Effect)
According to the structure of the X-ray long image partition of the invention according to claim 3, the partition main body is provided with the marker and the drive marker which can be driven and moved in the vertical direction, and the fixed position of the drive marker is detected. From this, when obtaining long image data from three pieces of divided image data, the driving marker is appropriately moved to an overlapping portion between the shooting range at the intermediate position and the lowest shooting range in accordance with the position of the marker. It is possible to provide a screen that is useful in obtaining long image data with good image quality from three pieces of divided image data.

The invention according to claim 4
An X-ray imaging apparatus using the X-ray long imaging screen according to claim 1,
X-ray irradiating means for irradiating the subject with X-rays, a first driving device for driving and moving the X-ray irradiating means in the vertical direction, and X-rays that are attached to a standing stand and pass through the subject. X-ray detection means for detecting, a second drive device for driving the X-ray detection means up and down along the standing stand, and a plurality of imaging ranges continuous to the subject, A long image is formed by connecting divided image data collecting means for processing X-rays detected by the X-ray detecting means in each imaging range to collect divided image data and image data collected by the divided image data collecting means. Long image data creation means for creating data, marker position detection means for detecting a fixed position of the marker, and corresponding to the next imaging range based on the fixed position of the marker detected by the marker position detection means X-ray Control means for determining the positions of the irradiation means and the X-ray detection means and driving the first and second drive devices so as to move the X-ray irradiation means and the X-ray detection means to the determined positions; It is characterized by having.

(Action / Effect)
According to the configuration of the X-ray imaging apparatus of the fourth aspect of the invention, since the partition is interposed between the X-ray detection means and the subject, the X-ray detection means moves in the vertical direction during long-time imaging. At this time, the X-ray detection means can be prevented from coming into contact with the subject.
Moreover, since the marker is provided on the partition main body so that the fixed position can be changed in the vertical direction, it is possible to avoid wrapping the rubber band with the marker around the subject as in the past, and to make the subject feel uncomfortable. There is nothing.
In addition, since the position of the marker can be changed without touching the subject while the subject remains in front of the screen body, the movement of the subject can be suppressed, and the position of the marker can be determined. The relative position with respect to the X-ray detection means is not affected by the movement of the person, so that the image quality at the joined portion of the divided image data does not deteriorate, and the divided image data are well connected in the long photographing. An X-ray imaging apparatus that can be combined can be provided.

The invention according to claim 5
An X-ray imaging apparatus using the X-ray long imaging screen according to claim 2,
X-ray irradiating means for irradiating the subject with X-rays, a first driving device for driving and moving the X-ray irradiating means in the vertical direction, and X-rays that are attached to a standing stand and pass through the subject. X-ray detection means for detecting, a second drive device for driving the X-ray detection means up and down along the standing stand, and a plurality of imaging ranges continuous to the subject, A long image is formed by connecting divided image data collecting means for processing X-rays detected by the X-ray detecting means in each imaging range to collect divided image data and image data collected by the divided image data collecting means. Based on the position signal from the long image data creating means for creating data and the marker position detecting means, the positions of the X-ray irradiating means and the X-ray detecting means corresponding to the next imaging range are obtained and obtained. The X-ray irradiation means It is characterized in that a control means for driving said first and second drive device to move the fine said X-ray detecting means.

(Action / Effect)
According to the configuration of the X-ray imaging apparatus of the fifth aspect of the present invention, since the screen is interposed between the X-ray detection means and the subject, the X-ray detection means moves in the vertical direction during long-time imaging. At this time, the X-ray detection means can be prevented from coming into contact with the subject.
Moreover, since the marker is provided on the partition main body so that the fixed position can be changed in the vertical direction, it is possible to avoid wrapping the rubber band with the marker around the subject as in the past, and to make the subject feel uncomfortable. There is nothing.
In addition, since the position of the marker can be changed without touching the subject while the subject remains in front of the screen body, the movement of the subject can be suppressed, and the position of the marker can be determined. The relative position with respect to the X-ray detection means is not affected by the movement of the person, so that the image quality at the joined portion of the divided image data does not deteriorate, and the divided image data are well connected in the long photographing. An X-ray imaging apparatus that can be combined can be provided.
In addition, since the marker fixed position can be detected by the marker position detection means provided in the screen body, X-rays can be eliminated for detecting the marker position, and the labor and time required for imaging and the exposure dose can be reduced. A line imaging apparatus can be provided.
In addition, it is possible to provide an X-ray imaging apparatus that does not require image processing for marker position detection, has a simple configuration, and can reduce labor and time required for imaging.

The invention according to claim 6
An X-ray imaging apparatus using the X-ray long imaging screen according to claim 3,
X-ray irradiating means for irradiating the subject with X-rays, a first driving device for driving and moving the X-ray irradiating means in the vertical direction, and X-rays that are attached to a standing stand and pass through the subject. X-ray detection means for detecting, a second drive device for driving the X-ray detection means up and down along the standing stand, and a plurality of imaging ranges continuous to the subject, A long image is formed by connecting divided image data collecting means for processing X-rays detected by the X-ray detecting means in each imaging range to collect divided image data and image data collected by the divided image data collecting means. Based on the position signal from the long image data creating means for creating data and the marker position detecting means, the positions of the X-ray irradiating means and the X-ray detecting means corresponding to the next imaging range are obtained and obtained. The X-ray irradiation means And a control means for driving the first and second drive devices to move the X-ray detection means, and a drive marker corresponding to the next imaging range based on a position signal from the marker position detection means. Marker control means for determining a position and driving a marker driving mechanism to move the driving marker to the determined position is provided.

(Action / Effect)
According to the configuration of the X-ray imaging apparatus of the sixth aspect of the invention, since the partition is interposed between the X-ray detection means and the subject, the X-ray detection means moves in the vertical direction during long-time imaging. At this time, the X-ray detection means can be prevented from coming into contact with the subject.
Moreover, since the marker is provided on the partition main body so that the fixed position can be changed in the vertical direction, it is possible to avoid wrapping the rubber band with the marker around the subject as in the past, and to make the subject feel uncomfortable. There is nothing.
In addition, since the position of the marker can be changed without touching the subject while the subject remains in front of the screen body, the movement of the subject can be suppressed, and the position of the marker can be determined. The relative position with respect to the X-ray detection means is not affected by the movement of the person, so that the image quality at the joined portion of the divided image data does not deteriorate, and the divided image data are well connected in the long photographing. An X-ray imaging apparatus that can be combined can be provided.
Furthermore, since the partition body is provided with a marker and a drive marker that can be moved in the vertical direction, and the fixed position of the drive marker is detected, when obtaining long image data from three divided image data, Corresponding to the marker position, the drive marker can be moved appropriately to the overlapping position between the shooting range at the intermediate position and the lowest shooting range, and long image data with good image quality from the three divided image data Can be provided.

According to the configuration of the X-ray long imaging screen according to the first aspect of the invention, the X-ray detection means is used to be interposed between the X-ray detection means and the subject. When moving in the direction, the X-ray detection means can be prevented from contacting the subject.
Moreover, since the marker is provided on the partition main body so that the fixed position can be changed in the vertical direction, it is possible to avoid wrapping the rubber band with the marker around the subject as in the past, and to make the subject feel uncomfortable. There is nothing.
In addition, since the position of the marker can be changed without touching the subject while the subject remains in front of the screen body, the movement of the subject can be suppressed, and the position of the marker can be determined. Because it is not affected by the movement of the person and the relative position with respect to the X-ray detection means does not shift, the image quality at the joined portion of the image data does not deteriorate, and the divided images are joined together well in the long shooting. Can provide a screen that can

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an overall perspective view showing a screen for X-ray long photography according to Embodiment 1 of the present invention, and a pair of left and right support members 2 are erected on an H-shaped support base 1 and the support thereof is shown. A partition 3 is formed by stretching a sheet 3 made of a material capable of transmitting X-rays on the member 2.

A casing 5 that is long in the vertical direction is attached to one of the support members 2.
In the casing 5, as shown in the front view showing the inside of the casing in FIG. 2A, sprockets 6 are rotatably supported on the upper and lower ends, and a chain 7 is wound around the upper and lower sprockets 6. ing.

  As shown in a rear view of the casing in FIG. 2B and a partially cutaway side view of the casing in FIG. 2C, a guide groove 8 is formed on one side of the casing 5, and a marker 9 is formed on the chain 7. The marker 9 protrudes outward from the guide groove 8, and the marker 9 can be moved up and down along the seat 3 and can be fixed at an arbitrary position by friction.

In addition, as shown in the configuration diagram of the potentiometer of FIG. 2A and FIG.
A potentiometer 10 serving as marker position detecting means is interlocked and connected to the lower sprocket 6 via a speed reduction mechanism (not shown) so that a fixed position of the marker 9 can be detected and a position signal can be output.

  FIG. 3 is an overall side view showing an example of an X-ray imaging apparatus using the X-ray long imaging screen of Example 1, and X as an X-ray irradiation means for irradiating the subject H with X-rays. An X-ray detector (FPD) 12 serving as an X-ray detection means for detecting X-rays transmitted through the subject, and the X-ray detector 12 in the vicinity of the X-ray detector 11 An X-ray imaging apparatus is constituted by an X-ray long imaging screen 13 installed between the examiner H and the examiner H.

The X-ray tube 11 is provided at the lower end of a multistage X-ray tube holding member 15 that can be expanded and contracted in the vertical direction via a first electric motor 14 (see FIG. 4) as a first driving device. 11 can be driven and moved in the vertical direction. A collimator 16 is attached to the X-ray tube 11 on the X-ray irradiation port side.
The flat panel X-ray detector 12 is provided on the standing stand 18 so as to be movable in the vertical direction via a second electric motor 17 (see FIG. 4) as a second driving device.

As shown in the block diagram of the control system in FIG. 4, a controller 19 as control means is connected to the potentiometer 10, and a first electric motor 14 that drives and moves the X-ray tube 11 to the controller 19, and a flat panel A second electric motor 17 that drives and moves the X-ray detector 12 is connected.
The controller 19 is connected to a flat panel X-ray detector (FPD) 12, an X-ray irradiation control means 20, and a display monitor 20a.

  The controller 19 includes an X-ray tube movement amount calculation means 21, a first drive signal output means 22, an FPD movement amount calculation means 23, a second drive signal output means 24, a divided image data collection means 25, and long image data. Creation means 26 is provided.

The X-ray tube movement amount calculation means 21 calculates the position to which the X-ray tube 11 corresponding to the next imaging range should move based on the position signal from the potentiometer 10 and calculates the movement amount from that position. It is supposed to be.
The first drive signal output means 22 outputs to the first electric motor 14 a drive signal required to move by the movement amount calculated by the X-ray tube movement amount calculation means 21.

The FPD movement amount calculation means 23 calculates the position where the flat panel X-ray detector 12 corresponding to the next imaging range should move based on the position signal from the potentiometer 10, and the movement amount from the position at that time. Is calculated.
The second drive signal output means 24 outputs to the second electric motor 17 a drive signal necessary for movement by the movement amount calculated by the FPD movement amount calculation means 23.

  Based on the position signal from the potentiometer 10 by the X-ray tube movement amount calculation means 21, the first drive signal output means 22, the FPD movement amount calculation means 23, and the second drive signal output means 24, the next imaging range is obtained. The X-ray tube 11 and the flat panel X-ray detector 12 corresponding to the positions are obtained, and the first and second X-ray tubes 11 and the flat panel X-ray detector 12 are moved to the obtained positions. The control means 27 for driving the electric motors 14 and 17 is configured. In the case where the X-ray tube 11 and the flat panel X-ray detector 12 are configured to move to positions corresponding to each other in the vertical direction in conjunction with each other, the X-ray tube 11 or the flat panel X-ray detection is performed. The movement amount of the device 12 is calculated, and the first and second electric motors 14 and 17 may be driven based on the calculated movement amount.

The divided image data collecting unit 25 collects divided image data in the imaging ranges of the upper position and the lower position based on the position signal from the potentiometer 10 and the X-ray irradiation signal from the X-ray irradiation control unit 20. It has become.
Further, the long image data creating means 26 creates long image data by connecting the divided image data collected by the divided image data collecting means 25.
More specifically, each divided image data is overlapped, and in the overlapping portion, a portion below the marker 9 is trimmed from the upper image data, while a portion above the marker 9 is trimmed from the lower image data. Both pieces of image data are connected to obtain one piece of long image data. The obtained long image data can be output and displayed on the display monitor 20a.

The work procedure according to the above configuration will be described as follows.
As shown in FIG. 3, the light field projected from the collimator 16 causes the highest imaging range P <b> 1 based on the relative positional relationship between the subject H and the flat panel X-ray detector 12. The X-ray tube 11 and the flat panel X-ray detector 12 are moved and fixed. Thereafter, the marker 9 is manually moved to a position slightly above the lower end of the flat panel X-ray detector 12 and fixed.
In this state, X-rays are irradiated, and in response to the X-ray irradiation signal from the X-ray irradiation control means 20, the highest-order divided image data A1 in which the markers 9 are captured is obtained.

Thereafter, the X-ray tube 11 and the flat panel X-ray detector 12 are moved and fixed. At this time, based on the fixed position of the marker 9 described above, the movement amount to the shooting range P2 at the intermediate position which is the next shooting range is calculated, and from the lower end of the uppermost divided image data A1 to the marker 9 And the X-ray tube 11 and the flat panel X-ray detector 12 are automatically moved and fixed at a position where the length from the upper end of the intermediate divided image data A2 to the marker 9 becomes equal.
In this state, X-rays are irradiated, and in response to the X-ray irradiation signal from the X-ray irradiation control means 20, intermediate divided image data A2 in which the markers 9 are captured is obtained.

  The two pieces of divided image data A1 and A2 obtained as described above are joined together by performing the above-mentioned trimming by the long image data creating means 26, and image data for long photographing can be obtained.

  FIG. 5A is a side view showing a first modified example of the marker mounting structure and the marker position detecting means. A screw shaft 31 is provided in the casing 5 so as to be rotatable around a vertical axis. The marker 9 is externally screwed onto the screw shaft 31 so as to be movable only in the vertical direction along the guide groove 8.

Although not shown, the potentiometer 10 similar to that of the above-described embodiment is interlocked and connected to the lower end of the screw shaft 31 via a speed reduction mechanism.
Thereby, by moving the marker 9 up and down, the screw shaft 31 rotates, and the fixed position of the marker 9 can be detected from the rotation amount. Other configurations are the same as those of the first embodiment. In the second modification, a rotary handle may be interlocked and connected to the lower end side of the screw shaft 31 via a bevel gear mechanism or the like, and the fixed position of the marker 9 may be changed by rotating the rotary handle. .

  FIG. 5B is a side view showing a second modified example of the marker mounting structure and the marker position detecting means. A square-axis linear scale 41 extending in the vertical direction is attached to the screen body (not shown). The marker 9 is fitted on the linear scale 41 so as to be slidable only in the vertical direction.

  A conductive bar 42 is provided in parallel with the linear scale 41, and a ground power source 43 is connected to the lower end of the bar 42, while an ammeter 44 is connected to the lower end of the linear scale 41 and is detected by the ammeter 44. The fixed position of the marker 9 can be detected based on the current value. Other configurations are the same as those of the first embodiment.

6A is an overall perspective view showing a screen for X-ray long photography of Example 2 according to the present invention, and FIG. 6B is an enlarged view of a main part, and X-ray long photography of Example 1 is shown. The differences from the screen are as follows.
That is, the first marker 51 and the second marker 52 are attached to the chain 7 at a predetermined interval in the vertical direction. A support plate 53 is attached to the chain 7, and a long hole 54 extending in the vertical direction is formed in the support plate 53. Through a pair of upper and lower bolts 55, a back plate (not shown), and a nut (not shown), A second marker 52 on the lower side is attached to the support plate 53 so that the fixing position can be finely adjusted in the vertical direction.

  The distance between the first marker 51 and the second marker 52 is the length obtained by subtracting the normal overlap length set during long imaging from the vertical length of the detection surface of the flat panel X-ray detector 12. The interval is set appropriately, and the interval can be finely adjusted by mounting through the long hole 54 described above. The surface of the support plate 53 is spaced from the first marker 51 by a scale or the like. Other configurations (such as a marker position detection configuration and a long shooting control system) are the same as those in the first embodiment, and a description thereof will be omitted.

The X-ray long image partition 56 of the second embodiment is used when three pieces of divided image data are connected to obtain long image data. The operation procedure will be described as follows. .
As shown in the overall side view of the X-ray imaging apparatus using the X-ray long imaging screen of Example 2 in FIG. 7, depending on the light irradiation field projected from the collimator 16, Based on the relative positional relationship of the flat panel X-ray detector 12, the X-ray tube 11 and the flat panel X-ray detector 12 are moved and fixed to the uppermost imaging range P1. Thereafter, the first and second markers 51 and 52 are manually moved and fixed to a position slightly above the lower end of the flat panel X-ray detector 12. In addition, in order to make it easy to understand, in FIG. 7, the 2nd marker 52 is shown as the continuous line.
In that state, X-rays are irradiated, and in response to the X-ray irradiation signal from the X-ray irradiation control means 20, the highest-order divided image data A1 in which the first marker 51 is captured is obtained.

Thereafter, the X-ray tube 11 and the flat panel X-ray detector 12 are moved and fixed. At this time, based on the fixed positions of the first and second markers 51 and 52 described above, the amount of movement to the shooting range P2 of the intermediate position, which is the next shooting range, is calculated, and the uppermost divided image The length from the lower end of the data A1 to the first marker 51, the length from the upper end of the intermediate divided image data A2 to the first marker 51, and the second marker 52 from the lower end of the intermediate divided image data A2 The X-ray tube 11 and the flat panel X-ray detector 12 are automatically moved and fixed at positions where the respective lengths are equal to each other.
In this state, X-ray irradiation is performed, and in response to the X-ray irradiation signal from the X-ray irradiation control means 20, intermediate divided image data A2 in which the first and second markers 51 and 52 are captured is obtained.

Thereafter, the X-ray tube 11 and the flat panel X-ray detector 12 are moved and fixed. At this time, based on the fixed positions of the first and second markers 51 and 52 described above, the movement amount to the lowest shooting range P3, which is the next shooting range, is calculated, and the intermediate divided image data The X-ray tube 11 and the flat panel X-ray detector are positioned so that the length from the lower end of A2 to the second marker 52 is equal to the length from the upper end of the lowest divided image data A3 to the second marker 52. 12 is automatically moved and fixed.
In this state, X-rays are irradiated, and in response to the X-ray irradiation signal from the X-ray irradiation control means 20, the lowest-order divided image data A3 in which the second marker 52 is captured is obtained.

  The three pieces of divided image data A1, A2, and A3 obtained as described above are joined together by the long image data creating means 26 while performing the above-mentioned trimming, thereby obtaining image data for long photographing. it can.

  FIG. 8A is an overall perspective view showing the X-ray long image partition of Example 3 according to the present invention, FIG. 8B is a front view showing the inside of the second casing, and FIG. FIG. 2 is a partially cutaway side view of the casing of FIG. 1 and is different from the X-ray long-length screen of Example 1 as follows.

That is, the marker 9 is provided on one of both sides of the partition body 4 as in the first embodiment, and the drive marker 61 is provided on the other.
The drive marker 61 is attached to a chain 65 wound around an upper sprocket 63 and a lower sprocket 64 that are rotatably supported by the second casing 62, and from a guide groove 66 formed on one side surface of the casing 62. It is protruding.

A drive marker potentiometer 67 similar to that of the first embodiment is linked to the upper sprocket 63 as drive marker position detecting means, and is configured to detect the position of the drive marker 61 in the vertical direction.
On the other hand, a marker electric motor 68 as a marker drive mechanism is interlocked and connected to the lower sprocket 64 so that the drive marker 61 can be driven and moved in the vertical direction. The other configuration is the same as that of the X-ray long image partition of Example 1, and the description is omitted by assigning the same number.

FIG. 9 is a block diagram illustrating a control system of the X-ray imaging apparatus using the X-ray long imaging screen according to the third embodiment, and the X-ray imaging apparatus using the X-ray long imaging screen according to the first embodiment. The difference from this control system is as follows.
That is, a drive marker potentiometer 67 is connected to the controller 19, and a marker electric motor 68 is connected to the controller 19. In the controller 19, a marker control unit 71 including a drive marker movement amount calculation unit 69 and a third drive signal output unit 70 is provided.

The drive marker movement amount calculation means 69 calculates the movement amount of the drive marker 61 based on the position of the marker 9 detected by the potentiometer 10 and the position of the drive marker 61 detected by the drive marker potentiometer 67. It is like that.
That is, if the length in the vertical direction of the detection surface of the flat panel X-ray detector 12 is L1, and the length between the position of the marker 9 and the lower end of the detection surface of the flat panel X-ray detector 12 is L2, The position of the driving marker 61 needs to be lower than the position of the marker 9 by L (= L1-L2). Thus, the position of the drive marker 61 is obtained, and the amount of movement of the drive marker 61 is calculated from the position and the position of the drive marker 61 detected by the drive marker potentiometer 67.

  The third drive signal output means 70 outputs a drive signal necessary for movement by the movement amount calculated by the drive marker movement amount calculation means 69 to the marker electric motor 68, and the imaging range at an intermediate position to be described later. The driving marker 61 is automatically moved to an appropriate position within the overlapping area between the lowermost shooting range and the lowest shooting range.

In the case of an X-ray imaging apparatus that uses the X-ray long imaging screen 72 of Example 3 to obtain long image data by joining three pieces of divided image data, the X-ray long imaging screen of Example 2 is used. The difference from the case of the X-ray imaging apparatus using 56 is as follows.
That is, as shown in the overall side view of the X-ray imaging apparatus using the X-ray long imaging screen of Example 3 in FIG. 10, the division obtained in the imaging range P2 at the intermediate position and the lowest imaging range P3 respectively. In the overlapping area of the image data A2 and A3, the drive marker 61 is captured at a position opposite to the marker 9. For the sake of clarity, the drive marker 61 is shown by a solid line in FIG. Other operations are the same as those in the case of the X-ray imaging apparatus using the X-ray long imaging screen 56 of Example 2, and the description thereof is omitted.

In the above embodiment, the control unit 27 is configured to include the marker position detection unit that detects the fixed positions of the markers 9, 51, 52. However, according to the present invention, the position of the markers 9, 5152 is image-processed. The control means 27 may be configured to include marker position detection means for detecting by the above.
Further, as the marker position detecting means, a rotary encoder may be used instead of the potentiometer 10.
Further, the marker 9, 51, 52 may be configured to be changed by a simple electric motor.

In the X-ray imaging apparatus of the above embodiment, the flat panel X-ray detector 12 is used as the X-ray detection means. However, for example, an X-ray film may be used as the present invention.
In the above embodiment, the X-ray tube 11 is moved in the vertical direction to change the imaging range. However, the X-ray tube 11 is rotated around the horizontal axis, It may be configured such that the imaging range can be changed by changing the irradiation field in the vertical direction.

It is a whole perspective view which shows Example 1 of the screen for X-ray long imaging | photography concerning this invention. (A) is a front view showing the inside of the casing, (b) is a rear view of the casing, (c) is a partially cutaway side view of the casing, and (d) is a schematic configuration diagram of the potentiometer. is there. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view showing an embodiment of an X-ray imaging apparatus using an X-ray long imaging screen of Example 1. It is a block diagram which shows a control system. It is a side view which shows the modification of a marker attachment structure and a marker position detection means, (a) has shown the 1st modification, (b) has each shown the 2nd modification. Overall perspective view showing a partition for X-ray long photography of Example 3 according to the present invention, It is a whole perspective view which shows Example 2 of the screen for X-ray long imaging | photography concerning this invention. It is a whole side view which shows the Example of the X-ray imaging apparatus using the partition for X-ray long imaging | photography of Example 2. FIG. (A) is the whole perspective view which shows Example 3 of the screen for X-ray long photography which concerns on this invention, (b) is a front view which shows the inside of a 2nd casing, (c) is a 2nd casing. It is a partially cutaway side view. It is a block diagram which shows a control system. It is a whole side view which shows the Example of the X-ray imaging apparatus using the partition for X-ray long imaging | photography of Example 3. FIG.

Explanation of symbols

4 ... Screen body 9 ... Marker 10 ... Potentiometer (marker position detection means)
11 ... X-ray tube (X-ray irradiation means)
12. Flat panel X-ray detector (X-ray detection means)
13 ... Screen for long X-ray imaging 14 ... First electric motor (first driving device)
17 ... 2nd electric motor (2nd drive device)
DESCRIPTION OF SYMBOLS 18 ... Standing stand 25 ... Divided image data collection means 26 ... Long image data creation means 27 ... Control means 41 ... Linear scale (marker position detection means)
42 ... Bar (marker position detecting means)
43 ... Power supply (marker position detection means)
44. Ammeter (marker position detection means)
DESCRIPTION OF SYMBOLS 51 ... 1st marker 52 ... 2nd marker 56 ... Screen for X-ray long photography 61 ... Drive marker 67 ... Potentiometer for drive marker (drive marker position detection means)
68. Electric motor for marker (marker drive mechanism)
71 ... Marker control means 72 ... Screen for long X-ray photography H ... Subject

Claims (6)

A screen for X-ray long imaging provided between an X-ray irradiation means for irradiating the subject with X-rays and an X-ray detection means attached to the standing stand and detecting the X-rays transmitted through the subject. Because
A screen for X-ray long photography, characterized in that a marker is provided on the screen body so that the fixed position can be changed in the vertical direction. In the partition for X-ray long photography of Claim 1,
A screen for X-ray long photography, comprising marker position detection means for detecting a fixed position of the marker and outputting a position signal to the screen body. In the screen for X-ray long photography according to claim 1 or 2,
An X-ray length provided with a drive marker provided on the partition body so as to be movable in the vertical direction, a marker drive mechanism for driving and moving the drive marker, and a drive marker position detecting means for detecting a fixed position of the drive marker A screen for taking a picture. An X-ray imaging apparatus using the X-ray long imaging screen according to claim 1,
X-ray irradiating means for irradiating the subject with X-rays, a first driving device for driving and moving the X-ray irradiating means in the vertical direction, and X-rays that are attached to a standing stand and pass through the subject. X-ray detection means for detecting, a second drive device for driving the X-ray detection means up and down along the standing stand, and a plurality of imaging ranges continuous to the subject, A long image is formed by connecting divided image data collecting means for processing X-rays detected by the X-ray detecting means in each imaging range to collect divided image data and image data collected by the divided image data collecting means. Long image data creation means for creating data, marker position detection means for detecting a fixed position of the marker, and corresponding to the next imaging range based on the fixed position of the marker detected by the marker position detection means X-ray Control means for determining the positions of the irradiation means and the X-ray detection means and driving the first and second drive devices so as to move the X-ray irradiation means and the X-ray detection means to the determined positions; An X-ray imaging apparatus comprising: An X-ray imaging apparatus using the X-ray long imaging screen according to claim 2,
X-ray irradiating means for irradiating the subject with X-rays, a first driving device for driving and moving the X-ray irradiating means in the vertical direction, and X-rays that are attached to a standing stand and pass through the subject. X-ray detection means for detecting, a second drive device for driving the X-ray detection means up and down along the standing stand, and a plurality of imaging ranges continuous to the subject, A long image is formed by connecting divided image data collecting means for processing X-rays detected by the X-ray detecting means in each imaging range to collect divided image data and image data collected by the divided image data collecting means. Based on the position signal from the long image data creating means for creating data and the marker position detecting means, the positions of the X-ray irradiating means and the X-ray detecting means corresponding to the next imaging range are obtained and obtained. The X-ray irradiation means X-ray imaging apparatus characterized by comprising a control means for driving said first and second drive device to move the fine said X-ray detecting means. An X-ray imaging apparatus using the X-ray long imaging screen according to claim 3,
X-ray irradiating means for irradiating the subject with X-rays, a first driving device for driving and moving the X-ray irradiating means in the vertical direction, and X-rays that are attached to a standing stand and pass through the subject. X-ray detection means for detecting, a second drive device for driving the X-ray detection means up and down along the standing stand, and a plurality of imaging ranges continuous to the subject, A long image is formed by connecting divided image data collecting means for processing X-rays detected by the X-ray detecting means in each imaging range to collect divided image data and image data collected by the divided image data collecting means. Based on the position signal from the long image data creating means for creating data and the marker position detecting means, the positions of the X-ray irradiating means and the X-ray detecting means corresponding to the next imaging range are obtained and obtained. The X-ray irradiation means And a control means for driving the first and second drive devices to move the X-ray detection means, and a drive marker corresponding to the next imaging range based on a position signal from the marker position detection means. An X-ray imaging apparatus comprising: marker control means for determining a position and driving a marker driving mechanism so as to move the driving marker to the determined position.

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