JP2011115454A - X-ray image diagnostic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray diagnostic apparatus, photographing both in a photographing system where a top plate is held between an X-ray tube and an X-ray detector and a system where a top plate is not held. <P>SOLUTION: This X-ray image diagnostic apparatus includes: an X-ray detecting means detecting an X-ray; an X-ray generating means irradiating an X-ray toward the X-ray detecting means; a first top plate and a second stop plate; and a driving part for moving the first top plate and the X-ray detecting means to take a first position where the first top plate is separated from the second top plate and the X-ray detecting means is exposed from the separated area to the X-ray generating means, and a second position where the first top plate comes close to the second top plate and the X-ray detecting means is opposite to the X-ray generating means with the top plate interposed therebetween. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an X-ray image diagnostic apparatus in which an X-ray detection apparatus is configured to be movable.

A so-called X-ray diagnostic imaging apparatus that obtains an image inside a subject by irradiating the subject with X-rays and detecting the X-ray transmitted through the subject is becoming widespread. Such an X-ray diagnostic imaging apparatus is indispensable in today's medical care because it can observe the inside of a subject.

An X-ray diagnostic imaging apparatus is generally configured by facing an X-ray tube that emits X-rays and an X-ray detector that detects X-rays and converts them into image signals. When taking an X-ray image, first, a subject is placed between the X-ray tube and the X-ray detector. Then, by applying a high voltage to the X-ray tube, the X-ray tube irradiates the subject with X-rays. The irradiated X-rays pass through the subject and enter the X-ray detector. Since the intensity of irradiated X-rays changes as it passes through the subject, X
The line detector displays the internal structure of the subject by detecting the amount of change in X-rays.

In general, when the region of the subject to be imaged is different, it is necessary to change the imaging method of the X-ray image diagnostic apparatus. For example, when performing so-called general imaging in which the subject is in a standing posture and the subject's lungs are imaged, the subject is positioned so as to be in contact with an X-ray detector installed perpendicular to the floor surface. . An X-ray tube arranged so as to be parallel to the X-ray detector with the subject in between emits X-rays toward the X-ray detector, so that the X-ray detector transmits X through the subject. A method of detecting a line and generating a projection image is generally used. On the other hand, when imaging the subject's digestive tract or the like, a top plate is provided on the top of the X-ray detector installed horizontally with respect to the floor surface, and the subject is placed on the top plate. An X-ray tube disposed above the subject is X
In general, a method is used in which an X-ray detector detects X-rays transmitted through a subject and generates an image signal by irradiating the line detector with X-rays. In such an X-ray diagnostic imaging apparatus, an FPD (Flat Panel Detector: X-ray flat panel detector) configured by arranging semiconductor elements that generate charges in accordance with X-ray energy on a thin flat plate is used as an X-ray detector. Has become the mainstream.

When imaging the subject with the subject placed on the top board, an X-ray tube is placed at the upper end of the arm and an X-ray is placed at the lower end.
A line detector is provided. An X-ray diagnostic imaging apparatus is disclosed in which an arm is positioned so as to sandwich a top plate on which a subject is placed, and an X-ray detector detects X-rays transmitted through the subject and the top plate (
See, for example, US Pat. ).

JP 2006-239126 A

When imaging is performed by placing the subject on the top board in the X-ray diagnostic imaging apparatus described above, the X-rays irradiated from the X-ray tube pass through the subject and the top board and reach the FPD. In order to perform imaging through the top board, the distance between the subject and the FPD is farther than that in general imaging in which imaging is performed while the subject and the FPD are in contact with each other. Due to the distance between the subject and the FPD, the image formed by the X-rays transmitted through the subject on the FPD is blurred, and as a result, the image quality of the X-ray image detected by the FPD is degraded.

Therefore, in order to perform general imaging with high accuracy, an X-ray diagnostic apparatus that exposes the FPD without providing a top plate is provided separately from a set of X-ray diagnostic apparatuses that perform imaging of the digestive tract and the like by placing a subject on the top plate. It was necessary to prepare a new line diagnostic device. However, since the FPD is generally expensive, there has been a demand for performing both general imaging and gastrointestinal imaging using one FPD. Therefore, in the present invention, by adopting a configuration in which the top plate and the X-ray detector are moved, an imaging method in which the top plate is sandwiched between the X-ray tube and the X-ray detector, and an imaging method in which the top plate is not sandwiched are employed. An X-ray diagnostic imaging apparatus capable of performing any imaging is provided.

In order to solve the above problems, an X-ray diagnostic imaging apparatus according to the present invention includes an X-ray detection unit that detects X-rays, an X-ray generation unit that irradiates X-rays toward the X-ray detection unit, and a first ceiling. A first position where the first top plate is separated from the second top plate, and the X-ray detection means is exposed to the X-ray generation means from the separated area; The first top plate is close to the second top plate, and the X-ray detection means can take a second position facing the X-ray generation means with the top plate in between. And a drive unit for moving the first top plate and the X-ray detection means.

According to the present invention, the top plate and the X-ray detector are moved according to the imaging region of the subject. This provides an X-ray diagnostic imaging apparatus capable of performing both of an imaging method in which the top plate is sandwiched between the X-ray tube and the X-ray detector and an imaging method in which the top plate is not sandwiched. .

1 is a block diagram showing a configuration of an X-ray image diagnostic apparatus according to an embodiment of the present invention. The figure which shows the external appearance of the side surface of the X-ray image diagnostic apparatus which concerns on embodiment of this invention. The figure which shows the position state of each drive device in the case of imaging | photography of the digestive tract imaging | photography mode which concerns on embodiment of this invention. The figure which shows the position state of each drive device at the time of imaging | photography of the general imaging | photography mode which concerns on embodiment of this invention. The figure which shows the structural example of the operation part which concerns on embodiment of this invention. The functional block diagram which shows the structure of the correction | amendment image generation part which concerns on embodiment of this invention. 6 is a flowchart showing a flow of imaging processing according to the embodiment of the present invention. The figure which shows the structure which provided the drive part in the 1st top plate which concerns on embodiment of this invention. The figure which shows the position state of each drive device in the case of performing imaging | photography of general imaging | photography mode in the structure of the X-ray-image diagnostic apparatus shown in FIG. 7 based on embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing a configuration of an X-ray image diagnostic apparatus 1 according to the present invention. The X-ray diagnostic imaging apparatus 1 is configured to include various components shown in FIG.

(Configuration of X-ray image diagnostic apparatus)
The X-ray image diagnostic apparatus 1 includes a system control unit 100. The system control unit 100 uses C
PU (Central Processing Unit), ROM (Read Onl)
y Memory) and RAM (Random Access Memory). The system control unit 100 executes processing in accordance with programs stored in the ROM and various application programs loaded from the storage unit 105 described later into the RAM. An application program loaded into the RAM includes an X-ray detection apparatus I described later.
/ F101, image generation unit 102, image output I / F103, operation unit I / F107, drive unit I
/ F108, the corrected image generation unit 109, and the like. The system control unit 100 processes signals supplied from the respective units, generates various control signals, and supplies them to the respective units. Through such processing, the system control unit 100 controls the X-ray diagnostic apparatus in an integrated manner. Further, the system control unit 100 receives an instruction input from the user through the operation unit 16.

The operation unit 16 includes, for example, a touch panel display, or mechanical buttons and levers, and receives an input made by the user of the X-ray image diagnostic apparatus 1 on the operation unit 16. The user instruction received by the operation unit 16 is converted into an input signal by the operation unit I / F 107 built in the system control unit 100. The system control unit 100 has an operation unit I / F.
Various processes such as an imaging process, which will be described later, and an imaging arrangement control process of the X-ray diagnostic apparatus, are executed in accordance with the input signal output from 107.

The storage unit 105 includes, for example, a ROM, a RAM, a flash memory that is an electrically rewritable and erasable nonvolatile memory, and a storage medium such as an HDD (Hard Disc Drive). The storage unit 105 is controlled by the CPU of the system control unit 100. Various application programs and control data to be executed, and the image generation unit 102 or the corrected image generation unit 109
The image data output from is stored. The storage unit 105 has a built-in boundary correction image DB 106 and stores boundary correction image data used for image correction processing described later. RAM is CP
Data necessary for U to execute various processes and data relating to a corrected projection image described later are temporarily stored. The system control unit 100 and the storage unit 105 may be provided either outside or inside the support base 24, or may be provided outside or inside the bed frame 27. Absent.

The bed frame 27 incorporates various devices for performing imaging using X-rays to be described later. The bed frame 27 is connected to the bed rotation mechanism 22, and the bed frame 27 is supported on the floor surface by a support table 24 to which the bed rotation mechanism 22 is attached.

On the upper part of the bed frame 27, the first top plate 2 and the second top plate 3 are installed. The subject 4 is placed on the first top plate 2 and the second top plate 3 when photographing a digestive organ or the like, which will be described later.

An X-ray tube 6 connected to the upper end of the arm 23 is provided above the first top plate 2 and the second top plate 3. An X-ray control device 5 is connected to the X-ray tube 6. The X-ray control device 5 supplies a tube voltage and a tube current to the X-ray tube 6 and irradiates the X-ray tube 6 with X-rays. The X-ray control device 5 generates X-rays having a desired irradiation amount and energy from the X-ray tube 6, and X voltage such as a tube voltage amount, a tube current amount, and an X-ray pulse width supplied to the X-ray tube 6. Control line output conditions. X-rays radiated from the X-ray tube 6 pass through the subject 4, the first top plate 2 and the second top plate 3, are provided inside the bed frame 27, and are connected to the lower end of the arm 23. Flat Panel Detector:
X-ray flat panel detector).

The FPD 7 is configured, for example, by forming a switching element and a capacitive element on a glass substrate and further covering these elements with a photoconductive film. The photoconductive film generates an electric charge according to the energy of incident X-rays. The electric charge generated from the photoconductive film is stored on the capacitive element. When a certain amount or more of charge is stored on the capacitive element, the FPD 7 converts the electrification into an electric signal through the switching element and outputs it to the system control unit 100 to which the FPD 7 is connected. FPD
7 inputs an electric signal generated by the incidence of X-rays to the X-ray detection apparatus I / F 101 built in the system control unit 100. The X-ray detection apparatus I / F 101 converts the electric signal input from the FPD 7 into an image signal that can be processed by a computer, and inputs the image signal to the image generation unit 102.

The image generation unit 102 generates image data based on the image signal input from the X-ray detection apparatus I / F 101. The image generation unit outputs the generated image data to the image output I / F 103.

The image output I / F 103 outputs the image data output from the image generation unit 102 to the monitor 14.
Is converted into a monitor image signal that can be displayed on the monitor 14 and output to the monitor 14. The monitor 14 receives the monitor image signal output from the image output I / F 103 and displays it. In the present embodiment, an example in which the image data generated by the image generation unit 102 is displayed on the monitor 14 is shown, but the configuration of the present invention is not limited to this. For example, the image data generated by the image generation unit 102 may be output to the storage unit 105. When the image data generated by the image generation unit 102 is output to the storage unit 105, the storage unit 105 stores the input image data.

(Configuration of drive unit)
The X-ray diagnostic imaging apparatus 1 of the present invention has a function of controlling the imaging arrangement of the X-ray diagnostic imaging apparatus 1 in accordance with the imaging method for imaging the subject 4. The shooting arrangement is controlled by the drive unit I / F 108,
A first top slider 19, a second top slider 20, a push-out mechanism 21, a bed rotation mechanism 22,
The drive unit includes an arm slider 25 and an arm rotation mechanism 26.

The drive unit I / F 108 built in the system control unit 100 includes a first top plate slider 19, a second top plate slider 20, a push-out mechanism 21, and a bed rotation mechanism 2 provided on the bed frame 27.
2. An attitude control signal for instructing driving to the arm slider 25 and the arm rotation mechanism 26 is output.

The first top plate slider 19 and the second top plate slider 20 are respectively a first top plate and a second top plate 3.
Connected to. The first top plate slider 19 and the second top plate slider 20 have a drive unit I / F 108.
In accordance with the attitude control signal output from, the first top plate 2 and the second top plate 3 are separated from each other,
(Directions 201 and 204 shown in FIG. 3) or close proximity (directions 202 and 2 shown in FIG. 3)
03). The first top plate slider 19 and the second top plate slider 20 are, for example, the first top plate 2 and the second top plate slider 20.
It comprises a guide rail provided along the longitudinal direction of the top plate 3, a belt assembled integrally with the first top plate 2 and the second top plate 3, and a motor for rotating the belt. Moreover, the 1st top plate 2 and the 2nd top plate 3 are attached so that it can move on the guide rail of the 1st top plate slider 19 or the 2nd top plate slider 20 using a slider. When the motor of the first top plate slider 19 or the second top plate slider 20 rotates, the belt to which the motor is attached rotates. The belt assembled integrally with the first top plate or the second top plate moves the first top plate 2 or the second top plate along the guide rail by rotating. In addition, the structure of the drive device of the 1st top plate 2 or the 2nd top plate 3 in this invention is not restricted to this. For example, the 1st top-plate slider 19 and the 2nd top-plate slider 20 are comprised from the gear which provided the unevenness | corrugation, and the motor which rotates a gear. On the other hand, the back surface of the first top plate 2 and the second top plate 3 is provided with irregularities corresponding to this gear and assembled to the gear. When the motor of the first top plate slider 19 or the second top plate slider 20 rotates, the gear assembled to the motor rotates.
The rotating gear meshes with the unevenness provided on the back surface of the first top plate 2 or the second top plate 3, and the gear moves the first top plate 2 or the second top plate along the guide rail. Or you may comprise the mechanism which drives the 1st top plate 2 and the 2nd top plate 3 using other various methods.

The push-out mechanism 21 is provided so as to connect the bottom of the arm 23 and the back surface of the FPD 7.
The urging mechanism 21 expands according to the attitude control signal output from the drive unit I / F 108,
The height of the FPD 7 to which the push-out mechanism 21 is attached is changed (direction 205 and direction 206 in FIG. 3). The push-out mechanism 21 is composed of, for example, a cylinder that expands and contracts according to an electric signal. When the driving device of the first top plate slider 19 and the second top plate slider 20 described above is driven and the first top plate 2 and the second top plate 3 are separated from each other, a gap appears between the two top plates. Become. In this state, the FPD 7 is exposed to the subject 4. When the urging mechanism 21 extends when the first top plate 2 and the second top plate 3 are separated from each other (direction 205 in FIG. 3).
The FPD 7 is pushed out from the gap between the first top plate 2 and the second top plate 3 and approaches the X-ray tube 6.

The bed rotation mechanism 22 is provided so as to be connected to the bed frame 27. Sleeper rotation mechanism 2
2 rotates according to the attitude control signal output from the drive unit I / F 108, and the bed frame 2
The angle with respect to the floor surface of 7 is changed. The bed rotation mechanism 22 includes, for example, a fixed gear assembled to the support table 23, a movable gear that meshes with the fixed gear, and a motor that rotates the movable gear. When the motor of the bed rotation mechanism 22 rotates, the movable gear attached integrally with the motor rotates. When the movable gear rotates, the bed movable mechanism 22 rotates with respect to the support table 23, and the bed frame 27 connected to the bed rotation mechanism 22 rotates in the same manner. As the bed frame 27 rotates and the angle with respect to the floor surface changes, the bed frame 2
Arm 23 attached to 7, X-ray tube 6 attached to arm 23, and push-out mechanism 2
Similarly to the bed frame 27, the angle of 1 etc. changes with respect to the floor surface. The bed rotation mechanism 22
In accordance with the attitude control signal output from the drive unit I / F 108, the bed frame 27 rotates from a state having a horizontal angle to the floor surface to a state having a vertical angle.

The arm slider 25 is provided so as to connect the bed frame 27 and the arm 23. The arm slider 25 moves the arm 23 along the bed in accordance with the attitude control signal output from the drive unit I / F 108. The X-ray diagnostic imaging apparatus 1 can change the imaging region of the subject 4 by moving the arm 23. Similarly to the first top slider 19 and the second top slider 20, the arm slider 25 is, for example, a guide rail provided along the moving direction of the arm 23, a belt assembled integrally with the arm 23, and It consists of a motor that rotates the belt. The arm 23 is attached so as to be movable on the guide rail using a slider. As the motor of the arm slider 25 rotates, the motor moves the arm 23 along the guide rail.

The arm rotation mechanism 26 is provided so as to connect the arm 23 and the protruding mechanism 21 at the bottom of the arm 23. The arm rotation mechanism 26 rotates according to the attitude control signal output from the drive unit I / F 108 and changes the angle of the arm 23 with respect to the bed frame 27 (hereinafter simply referred to as a tilt angle). The X-ray diagnostic imaging apparatus 1 can image the subject 4 from various angles by rotating the arm 23. Similarly to the bed rotation mechanism 22, the arm rotation mechanism 26 includes, for example, a fixed gear assembled at the bottom of the arm 23, a movable gear that meshes with the fixed gear, and a motor that rotates the movable gear. As the motor of the arm rotation mechanism 26 rotates, the arm 23 rotates relative to the bed frame 27,
Generate tilt angle.

The first top plate slider 19, the second top plate slider 20, the push-out mechanism 21, the bed rotation mechanism 22, the arm slider 25, and the arm rotation mechanism 26 are driven when the driving ends. A drive end signal indicating the end of driving and the position state of each driving device after driving is output to the driving unit I / F 108. The system control unit 100 receives the drive end signal output from each drive device, and stores the position state of each drive device of the X-ray image diagnostic apparatus 1 in the storage unit 1.
Record in 05.

Further, in this embodiment, the configuration in which each driving device is driven by an electric device such as a motor is shown as an example. However, the configuration of the present invention is not limited to this. For example, a handle or the like is attached instead of the motor. The user of the X-ray diagnostic imaging apparatus 1 may be configured to manually drive each driving device by rotating the handle.

(Control of shooting arrangement)
In the X-ray diagnostic imaging apparatus 1 of the present invention, the drive unit I / F 108 sends the posture control signal to the first top plate slider 19 and the first top plate 19 in response to switching between the two imaging modes of the digestive tract imaging mode and the general imaging mode. 2 A posture control signal is output to the top plate slider 20 and the push-out mechanism 21. The first top slider 19, the second top slider 20, and the push-out mechanism 21 are driven according to the input of the posture control signal, and the imaging arrangement of the X-ray image diagnostic apparatus 1 is changed to a desired imaging region of the subject 4. To a suitable shooting arrangement for shooting.

For example, the X-ray diagnostic imaging apparatus 1 in the digestive tract imaging mode can store the FPD 7 in the bed frame 27 and further mount the subject 4 in order to take an image of the intestine or stomach of the subject 4. In this way, the photographing arrangement is changed such that the first top plate 2 and the second top plate 3 are close to each other. On the other hand, the X-ray diagnostic imaging apparatus 1 in the general imaging mode separates the first top plate 2 and the second top plate 3 in order to perform general imaging for imaging the lungs, bones, limbs, and the like of the subject 4. , The shooting arrangement changes from the gap where the FPD 7 is separated. The parts of the subject 4 imaged in the digestive tract imaging mode or the general imaging mode are not limited to those listed here, and various parts suitable for the imaging posture of the subject 4 may be imaged. Absent.

FIG. 3 shows an example of the imaging arrangement of the X-ray image diagnostic apparatus 1 when imaging in the digestive tract imaging mode is performed. When photographing in the digestive tract photographing mode with the photographing arrangement shown in FIG. 3, first, the drive unit I / F 16 retracts the push-out mechanism 21 and stores the FPD 7 in the bed frame 27. Then, the driving unit I / F 16 drives the first top plate slider 19 and the second top plate slider 20 to bring the first top plate 2 and the second top plate 3 close to each other. Further, the drive unit I / F 16 rotates the bed rotation mechanism 22 to rotate the bed frame 27 in a direction horizontal to the floor surface. With these operations, the X-ray diagnostic imaging apparatus 1 places the subject 4 on the first top plate 2 and the second top plate 3 and arranges the X-ray tube 6 and the FPD 7 arranged perpendicular to the floor surface. Can be used for shooting.

FIG. 4 shows an example of the imaging arrangement of the X-ray image diagnostic apparatus 1 when the general imaging mode is performed. 4, the driving unit I / F 16 drives the first top plate slider 19 and the second top plate slider 20 to perform the first top plate 2 and the second top plate 3. And are separated. In addition, the drive unit I / F 16 extends the push-out mechanism 21 and pushes out the FPD 7 from a gap formed between the first top plate 2 and the second top plate 3. Further, the driving unit I / F 16 rotates the bed rotation mechanism 22 and rotates the bed frame 27 in a direction perpendicular to the floor surface. With these operations, the X-ray diagnostic imaging apparatus 1 can perform imaging using the X-ray tube 6 and the FPD 7 that are placed in an upright posture and are horizontally disposed with respect to the floor surface. In the X-ray diagnostic imaging apparatus 1 of the present invention, when imaging in the general imaging mode is performed, the FPD 7 protrudes from between the first top 2 and the second top 3 and the subject 4 and the FPD 7 are in contact with each other. You can shoot with. X-rays irradiated from the X-ray tube 6 and transmitted through the subject 4 are directly incident on the FPD 7 without passing through the first top plate 2 or the second top plate 3. By performing imaging while the subject 4 and the FPD 7 are in contact with each other, blurring of the X-ray image on the FPD 7 caused by the distance between the subject 4 and the FPD 7 can be reduced. Further, since X-rays enter without passing through the first top plate 2 or the second top plate 3, unnecessary attenuation of X-rays generated when passing through the top plate can be suppressed. As a result, the FPD 7 can obtain a highly accurate transmitted image.

In the present embodiment, an example of a shooting arrangement in which the bed frame 27 is set at a horizontal angle with respect to the floor in the digestive tract shooting mode and the bed frame 27 is set at an angle perpendicular to the floor in the general shooting mode will be described. It was. However, the configuration of the present invention is not limited to this, and the angle of the bed frame 27 with respect to the floor surface may take various angles regardless of the shooting mode. In the general photographing mode, the configuration in which the FPD 7 is pushed out from the gap between the first top plate 2 and the second top plate 3 has been described as an example. However, the FPD 7 can be moved into the bed frame 27 as necessary in the general photographing mode. It may be stored and photographed.

In FIG. 5, the structural example of the operation part 16 in this invention comprised by the touchscreen display is shown. On the touch panel display constituting the operation unit 16, for example, imaging mode selection buttons 201, 202, 203 for instructing an imaging mode of the X-ray image diagnostic apparatus 1, and imaging arrangement control buttons 204, 205, indicating posture parameters of each driving device, 206, 207, and X
X-ray condition buttons 208, 209, 210 indicating drive parameters of the line control device 5, imaging arrangement control buttons 204, 205, 206, 207, and X-ray condition buttons 208, 209, 210
This is composed of parameter increase / decrease buttons 211 and 212, a numeric keypad 213, and the like.

The user of the X-ray diagnostic imaging apparatus 1 can select the imaging mode selection buttons 201, 202,
By touching any of 203, an input signal is input to the system control unit 100 through the operation unit I / F 107. The system control unit 100 receives an input signal output from the operation unit I / F 107 and switches the imaging mode of the X-ray image diagnostic apparatus 1. When the user of the X-ray diagnostic imaging apparatus 1 touches the imaging mode selection button 201, the system control unit 100
Switches to the digestive tract imaging mode in which the FPD 7 is stored in the bed frame 27,
On the other hand, when the shooting mode selection button 202 is touched, the system control unit 100 performs FPD.
7 is switched to the general photographing mode in which 7 is pushed out from the first top plate 2 and the second top plate 3. When 203 is touched, the system control unit 100 moves the FPD 7 to the bed frame 27.
Is switched to the general shooting mode in which the general shooting is performed in the state of being stored inside.

In addition, the user of the X-ray diagnostic imaging apparatus 1 can select parameter increase / decrease buttons 211 and 21 on the operation unit 16.
By touching 2, the input signal is input to the system control unit 10 through the operation unit I / F 107.
Enter 0. The system control unit 100 receives the input signal and outputs a control signal for changing the driving parameter of the corresponding driving device or X-ray control device 5 to the driving unit I / F 108 or the X-ray control device 5. Note that the user presses the parameter increase / decrease buttons 211, 21.
In place of operating 2, the shooting arrangement control buttons 204, 205, 206, 207 or X
A desired parameter may be input by touching any of the line condition buttons 208, 209, and 210 and then touching the numeric keypad 213.

For example, when the user of the X-ray image diagnostic apparatus 1 touches the parameter increase / decrease button 211 adjacent to the imaging arrangement control button 205, the drive unit I / F 108 outputs an attitude control signal to the push-out mechanism 21. The push-out mechanism 21 expands upon receiving the posture control signal, and moves the FPD 7 in the push-out direction (direction 205 in FIG. 3). On the other hand, when the user of the X-ray diagnostic imaging apparatus 1 touches the parameter increase / decrease button 212 adjacent to the imaging arrangement control button 205, the push-out mechanism 21 is retracted and the direction in which the FPD 7 is stored (direction 206 in FIG. 3). ).

(Image data correction)
By controlling the imaging arrangement described above, it is possible to perform imaging while switching between the two imaging modes of the digestive tract imaging mode and the general imaging mode using the X-ray image diagnostic apparatus 1 according to the present invention. As described above, when imaging is performed using the digestive tract imaging mode or the general imaging mode in which the FPD 7 is stored, the X-rays irradiated from the X-ray tube 6 pass through the subject 4 as shown in FIG. After that, the light passes through the boundary between the first top plate 2 and the second top plate 3 and enters the FPD 7. The rate of attenuation differs between the X-rays transmitted through the first top plate 2 or the second top plate 3 and the X-rays transmitted through the boundary. Therefore, the electrical signal detected by the FPD 7 in the shooting arrangement storing the FPD 7 includes an image of the boundary between the first top 2 and the second top 3.

Therefore, when the image generation unit 102 stores the FPD 7 and performs shooting, the image data is corrected using the boundary correction image stored in the storage unit 105, and the first top plate 2 and the second top plate 2 reflected in the image data are stored. The influence of the boundary with the top 3 is eliminated. The boundary correction image data generation method and the image data correction method will be described below with reference to FIG.

FIG. 6 is a functional block diagram showing components related to the generation of the boundary correction image and the configuration thereof. The generation of the boundary correction image is performed when the X-ray image diagnostic apparatus 1 is in an imaging arrangement in which the FPD 7 is stored, and the FPD 7 performs imaging without placing the subject 4. More specifically, first, the drive unit I / F 108 includes a first top plate slider 19, a second top plate slider 20, a projecting mechanism 21,
The attitude control signal is output to each drive device such as the above, and the FPD 7 is stored in the bed frame 27. Further, the drive unit I / F 108 changes the imaging arrangement of the X-ray image diagnostic apparatus 1 to an imaging arrangement having posture parameters such as a predetermined bed angle, a position of the arm 23 with respect to the bed frame 27, and a tilt angle of the arm 23. Next, the X-ray control device 5 applies power to the X-ray tube 6 based on X-ray conditions such as tube voltage, tube current, and X-ray pulse width, and irradiates the X-ray tube 6 with X-rays. Make it. The FPD 7 generates an electrical signal based on the X-rays emitted from the X-ray tube 6 and outputs the generated electrical signal to the X-ray detection apparatus I / F 11. The X-ray detection apparatus I / F 11 converts the projection image into an image signal and outputs the image signal to the image generation unit 102. The image generation unit 102 includes an X-ray detection apparatus I
The image signal input from / F11 is converted into image data. Then, the image generation unit 102
Stores the converted image data as boundary correction image data in the boundary correction image DB 106 in the storage unit 105 in association with the posture parameter and the X-ray condition. This series of boundary correction image data generation processing is performed for various posture parameters and X-ray conditions. Hereinafter, the posture parameters and the X-ray conditions are collectively referred to simply as imaging parameters.

Next, a method for correcting image data will be described. First, the subject 4 is placed on the first top plate 2 and the second top plate 3 of the X-ray image diagnostic apparatus 1 that takes an imaging arrangement in which the FPD 7 is stored. Next, the X-ray control device 5 applies power to the X-ray tube 6 to cause the X-ray tube 6 to perform X-ray irradiation. The FPD 7 generates an electrical signal based on the X-rays emitted from the X-ray tube 6 and outputs the generated electrical signal to the X-ray detection apparatus I / F 11. The X-ray detection apparatus I / F 11 converts an electrical signal into an image signal and outputs the image signal to the image generation unit 102. The image generation unit 102 converts the image signal input from the X-ray detection apparatus I / F 12 into image data.

When the image generation unit 102 generates image data, the corrected image generation unit 109 reads out imaging parameters when image data is generated from the X-ray control device 5 and the drive unit I / F 108. The imaging parameter when the system control unit 100 generates image data is output to the corrected image generation unit 109. Next, the corrected image generation unit 109 accesses the boundary corrected image DB 106 and reads out the boundary corrected image data associated with the shooting parameters. Then, the corrected image generation unit 109 calculates the difference between the image data output from the image generation unit 102 and the boundary correction image data, and generates corrected image data. The image data output by the image generation unit 102 is
This is image data obtained by photographing the boundary between the first top plate 2 and the second top plate 3 in addition to the subject 4. By taking a difference between this image data and boundary corrected image data obtained by photographing only the boundary, an element obtained by photographing the boundary from the image data can be deleted. Correction image generation unit 109
When the corrected image data is generated, it is output to the monitor 14 through the image output I / F 103 or output to the storage unit 105.

In the present invention, the boundary correction image data associated with the imaging parameters is stored in advance in the boundary correction image DB 106 by the above-described image data correction processing. In general, in the same manner as the image data of the subject 4 to be imaged changes in accordance with the change of the imaging parameter, the image data of the imaged boundary changes in accordance with the change of the imaging parameter. Therefore, the corrected image generation unit 109 reads the boundary correction image data corresponding to the captured shooting parameter, and corrects the image data using the read boundary correction image data, so that the corrected image generation unit 109 changes the shooting parameter in various ways. Even so, the boundary reflected in the image data can be corrected correctly.

(Flow of shooting process)
FIG. 7 is a flowchart showing the flow of imaging processing using the X-ray image diagnostic apparatus 1. Hereinafter, the flow of the photographing process will be described with reference to FIG.

First, when the X-ray diagnostic imaging apparatus 1 starts an imaging process (step 1000), the operation unit I /
F107 accepts the input of the shooting mode (step 1001). When the user of the X-ray image diagnostic apparatus 1 inputs an imaging mode through the operation unit 16, the system control unit 100.
Judges whether the input imaging mode is the digestive tract imaging mode or the general imaging mode (step 1002). The input of the imaging mode performed by the user of the X-ray image diagnostic apparatus 1 may not only indicate the imaging mode but also indicate various imaging parameters at the same time.

When the system control unit 100 determines that the imaging mode input from the operation unit 16 is the digestive tract imaging mode (“gastrointestinal imaging mode” in step 1002), the system control unit 100
Reads out the current position state of each driving device stored in the storage unit 105 and reads the current FP
D7 is stored inside the bed frame 27, or the first top plate 2 and the second top plate 3
It is determined whether it is approaching from (step 1003). The system control unit 100 performs FP
If it is determined that D7 is stored (“No” in step 1003), the system control unit 1
00 drives the X-ray controller 5 to perform imaging (step 1010). On the other hand, when the system control unit 100 determines that the FPD 7 is approaching (“Yes” in step 1003),
The system control unit 100 outputs an instruction signal for storing the FPD 7 to the drive unit I / F 108. Upon receiving the instruction signal output from the system control unit 100, the drive unit I / F 108 first retracts the push-out mechanism 21 and moves the FPD 7 into the bed frame 27 (step 1005). Next, the driving unit I / F 108 drives the first top plate slider 19 and the second top plate slider 20 to bring the first top plate 2 and the second top plate 3 close to each other (step 1006).
. When the system control unit 100 determines that the drive unit I / F 108 has completed the drive processing described in step 1005 and step 1006, the system control unit 100 drives the X-ray control device 5 to perform imaging (step 1010).

On the other hand, when the system control unit 100 determines that the shooting mode input from the operation unit 16 is the general shooting mode (“general shooting mode” in step 1002), the system control unit 10
0 determines whether the input general photographing mode is a photographing mode in which the FPD 7 is pushed out or a photographing mode in which the FPD 7 is stored in the bed frame 27 (step 1006).

When the system control unit 100 determines that the general shooting mode input from the operation unit 16 is a shooting mode in which the FPD 7 is stored (“No” in step 1006), the system control unit 10
0 and the drive unit I / F 108 perform the imaging process of step 1010 after performing the process described above in steps 1003 to 1005. On the other hand, when the system control unit determines that the general shooting mode input from the operation unit 16 is a shooting mode in which the FPD 7 is pushed out (
In step 1006, “Yes”), the system control unit 100 reads the position state of each driving device of the X-ray image diagnostic apparatus 1 stored in the storage unit 105, and whether the FPD 7 is stored or the FPD 7 is pushed out. Whether the position is present is determined (step 1007).

When the system control unit 100 determines that the FPD 7 is approaching (“Yes” in step 1007), the system control unit 100 drives the X-ray control device 5 to perform imaging (step 1010). On the other hand, when the system control unit 100 determines that the FPD 7 is not being pushed out (“No” in step 1007), the system control unit 100 outputs an instruction signal for pushing the FPD 7 to the driving unit I / F 108. . The drive unit I / F 108 is the system control unit 1
In response to the instruction signal output from 00, first the first top plate slider 19 and the second top plate slider 20 are driven to separate the first top plate 2 and the second top plate 3 (step 1008). Next, the drive unit I / F 108 extends the push-out mechanism 21 and pushes out the FPD 7 (step 1).
009). When the system control unit 100 determines that the drive unit I / F 108 has completed the drive processing described in step 1008 and step 1009, the system control unit 100 drives the X-ray control device 5 to perform imaging (step 1010).

When the photographing process described in step 1010 is completed, the system control unit 100 performs photographing.
It is determined whether the PD 7 has been pushed out or stored (step 1011). If the system control unit 100 determines that the shooting is performed by pressing the FPD 7 (“Yes” in step 1011), the system control unit 1
00 indicates that the image data generated by the image generation unit 102 is displayed on the monitor 1 through the image output I / F 13.
4 (step 1013), the process is terminated (step 1014). On the other hand, when the system control unit 100 determines that the shooting is performed by storing the FPD 7 (“No” in step 1011), the system control unit 100 causes the image generation unit 102 and the corrected image generation unit 109 to display an image. Outputs a data correction instruction signal. The image generation unit 102 receives the correction instruction signal output from the system control unit 100 and outputs the image data to the corrected image generation unit 109. The corrected image generation unit 109 receives the correction instruction signal output from the system control unit 100, and
Imaging parameters are acquired from the line control device 5 and the drive unit I / F 108. Then, the corrected image generation unit 109 reads out the boundary correction image data associated with the acquired shooting parameter from the boundary correction image DB 106. The corrected image generation unit 109 calculates a difference between the read boundary correction image data and the image data output from the image generation unit 102, and generates corrected image data (step 1012). The system control unit 100 outputs the corrected image data generated by the corrected image generation unit 109 to the monitor 14 through the image output I / F 103 (step 1013), and ends the processing (step 1014).

With the above processing, the X-ray diagnostic imaging apparatus 1 is an imaging mode in which the imaging mode instructed by the user is an imaging mode in which the top plate is sandwiched between the FPD 7 and the X-ray tube 6 or an imaging mode in which the top plate is not sandwiched. Each drive device is driven depending on whether it is present or not. Further, when shooting is performed in a shooting mode with the top plate sandwiched, image correction is performed using boundary correction image data stored in advance in the boundary correction image DB 106. As a result, it is possible to obtain image data that excludes the boundary between the first top plate 2 and the second top plate 3 and is reflected in the captured image data.

If the user of the X-ray diagnostic imaging apparatus 1 inputs an instruction for imaging parameters in addition to the imaging mode in step S1001, the driving unit I / F 108 inputs the position state of each driving apparatus in step 1010. To the one corresponding to the posture parameter set. For example, when the user of the X-ray image diagnostic apparatus 1 performs imaging in the general imaging mode in which the FPD 7 is pushed out, when the imaging arrangement control button 205 is operated, the driving unit I / F 108 performs step 1.
At 010, the amount of the FPD 7 protruding to the first top plate 2 and the second top plate 3 is changed.

In step 1010, the X-ray detection apparatus performs imaging by applying a power signal in accordance with the input X-ray condition to the X-ray tube 6. For example, when the user of the X-ray diagnostic imaging apparatus 1 operates the X-ray condition button 208 when performing imaging in the digestive tract imaging mode, the X-ray control apparatus 5 determines the value of the tube voltage applied to the X-ray tube 6. Change the to the specified value and take a picture.

Thus, in the X-ray image diagnostic apparatus 1 having the above-described configuration, imaging is performed by driving each driving device in accordance with the imaging mode instructed by the user. When photographing in the general photographing mode, the first top plate 2 and the second top plate are separated from each other, and the FPD 7 is pushed out from the separated gap. By performing imaging in a state where the FPD 7 and the subject 4 are in contact with each other, a projection image with less noise can be obtained. On the other hand, when performing imaging in the digestive tract imaging mode, the first top plate 2 and the second top plate 3 are brought close to each other, and the subject 4 is placed on the first top plate 2 and the second top plate 3 for imaging. It can be carried out. Furthermore, when imaging is performed in an imaging mode in which a top plate is sandwiched between the X-ray tube 6 and the FPD 7, the image is corrected using boundary correction image data stored in advance in the boundary correction image DB 106. Thereby, the image data which excluded the element of the boundary with the 1st top plate 2 and the 2nd top plate 3 contained in generated image data can be obtained.

Further, in the X-ray image diagnostic apparatus 1 having the above-described configuration, F is set in accordance with the imaging mode instructed by the user.
The PD 7 is housed in the bed frame 27 or the first top plate 2 and the top plate 3 are separated from each other and the FPD 7 is pushed out to perform photographing. Therefore, imaging with the top plate sandwiched between the X-ray tube 6 and the FPD 7 and imaging without the top plate can be performed with one apparatus, and the X-ray diagnostic imaging apparatus 1 can be installed with a smaller installation area. Can be configured.

In the X-ray diagnostic imaging apparatus 1 configured as described above, the FP is adapted to the imaging mode instructed by the user.
D7 is pushed out or stored, and the bed is rotated using the bed rotation mechanism 22. Thereby, the user of the X-ray diagnostic imaging apparatus 1 can perform imaging in the general imaging mode in which the FPD 7 is pushed out by changing the angle of the bed frame 27 with respect to the floor surface to a desired angle. Therefore, for example, the subject 4 is placed by making the bed frame 27 horizontal to the floor surface.
Can be easily imaged on a portion of the subject 4 such as a limb with the first top plate 2 or the second top plate 3 placed thereon.

(Second Embodiment)
8 and 9 are diagrams showing the configuration of the X-ray image diagnostic apparatus 1 according to the second embodiment of the present invention. In the second embodiment, the FPD 7 is provided so as to avoid the boundary between the first top plate 2 and the second top plate 3 and to come under the first top plate. Since the operation of each component of the X-ray image diagnostic apparatus 1 and the flow of imaging processing are the same as those described in the first embodiment, description thereof will be omitted.

FIG. 8 is a diagram illustrating a position state of each driving device when performing imaging in the digestive tract imaging mode in the X-ray image diagnostic apparatus 1 according to the second embodiment. In the X-ray image diagnostic apparatus 1 according to the second embodiment, the second top plate slider 20 is omitted, and the second top plate 3 is provided in contact with the lower end of the bed frame 27. Further, in the position state of each driving device when photographing in the digestive tract photographing mode, the FPD 7 avoids the lower portion of the boundary between the first top plate 2 and the second top plate 3 and comes below the first top plate 2. It is provided as follows.

Therefore, in the X-ray diagnostic imaging apparatus 1 according to the second embodiment, when imaging in the digestive tract imaging mode, X-rays emitted from the X-ray tube 6 are the first top plate 2 and the second top plate 3. The light enters the FPD 7 without passing through the boundary. For this reason, the projection image acquired by the FPD 7 is not affected by the boundary between the first top plate 2 and the second top plate 3. Therefore, in the X-ray image diagnostic apparatus 1 according to the second embodiment, it is not necessary to perform image data correction processing using the boundary correction image data described in Step 113 of FIG. The line image diagnostic apparatus 1 can be configured.

FIG. 9 is a diagram illustrating a position state of each driving device when performing imaging in the general imaging mode in the X-ray image diagnostic apparatus 1 according to the second embodiment. When performing imaging in the general imaging mode in the X-ray diagnostic imaging apparatus 1 according to the first embodiment, the second top 3 is used by using the second top slider 20.
When the second top plate 3 is moved in the separating direction, there is a possibility that the second top plate 3 protrudes to the lower part of the bed frame 27 and interferes with the floor surface. In the X-ray image diagnostic apparatus 1 according to the second embodiment, the second top plate 3 is provided so as to be in contact with the lower end of the bed frame 27 and is not driven. For this reason, interference with the 2nd top plate 3 and a floor surface can be avoided irrespective of the position state of each drive device. Further, when the FPD 7 is pushed out for shooting in the general shooting mode, a gap for pushing the FPD 7 can be created by driving only the first top plate slider 19. Therefore, in the X-ray diagnostic imaging apparatus 1 according to the second embodiment, the FPD 7 can be pushed out without providing the second top slider 20, and the X-ray diagnostic imaging apparatus 1 is configured with a simpler configuration. be able to.

The present invention is not limited to the above-described embodiments, and can be implemented in various forms without departing from the scope of the invention. For example, in the present embodiment, an example is shown in which the top plate is configured using two top plates, the first top plate and the second top plate, but the top plate is configured by combining three or more top plates, A top plate slider may be provided for each top plate. Further, although the example in which the driving direction of the top plate is horizontal with respect to the mounting direction of the subject has been shown, the top plate may be driven in a direction perpendicular to the mounting direction of the subject. Alternatively, when photographing in the general photographing mode, the FPD may be pushed out by rotating the top plate in a predetermined direction. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example,
You may delete a some component from all the components shown by embodiment. Or you may combine the component covering a different Example suitably.

DESCRIPTION OF SYMBOLS 1 X-ray diagnostic imaging apparatus 2 1st top plate 3 2nd top plate 4 Subject 5 X-ray generator 6 X-ray tube 7 FPD
14 Monitor 16 Operation unit 19 First top plate slider 20 Second top plate slider 21 Push-out mechanism 22 Couch rotation mechanism 23 Arm 24 Support base 25 Arm slider 26 Arm rotation mechanism 27 Couch frame 100 System control unit 101 X-ray detection device I / F
102 Image generation unit 103 Image output I / F
105 Storage Unit 106 Boundary Correction Image DB
107 Operation unit I / F
108 Drive I / F
109 Correction image generation unit

Claims (5)

X-ray detection means for detecting X-rays;
X-ray generation means for irradiating the X-ray detection means with X-rays;
A first top plate and a second top plate;
A first position where the first top plate is separated from the second top plate, and the X-ray detection means is exposed to the X-ray generation means from the separated region; and A second close to the second top plate and the X-ray detection means faces the X-ray generation means with the top plate in between.
An X-ray diagnostic imaging apparatus comprising: a drive unit that moves the first top plate and the X-ray detection means so that the position can be determined. The driving unit moves the X-ray detection unit to a position closer to the X-ray generation unit than the first top plate and the second top plate in the first position. The X-ray diagnostic imaging apparatus according to 1. In the second position, the driving unit moves the X-ray detection means to the first top plate or the second top plate.
The X-ray diagnostic imaging apparatus according to claim 1, wherein the X-ray diagnostic imaging apparatus is moved to a position facing the X-ray generation unit with either one of the top plates interposed therebetween. Image generation means for generating an X-ray image based on X-ray detection information detected by the X-ray detection means;
Correction means for correcting the X-ray image generated by the image generation means based on X-ray detection information detected by the X-ray detection means at the second position;
The X-ray image diagnostic apparatus according to claim 1, further comprising: In the first position, the drive unit rotates the first top plate, the second top plate, and the X-ray detection means in a direction perpendicular to the floor surface on which the X-ray image diagnostic apparatus is disposed. The X-ray image diagnostic apparatus according to any one of claims 1 to 4, wherein the X-ray image diagnostic apparatus according to any one of claims 1 to 4 is used.

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