JPH07250829A - Digital x-ray camera - Google Patents

Abstract

PURPOSE:To achieve a photographing of individual images by controlling rotary stereoscopic photographing and fluoroscopy in common about a site to be diagnosed of a subject. CONSTITUTION:Information is sent to an image processor 3 on the angle of photographing images which are taken and detected while a rotation support device 12 of a support device 1 for rotary stereoscopic photographing rotates and the image processor 3 stores the informations in a state being added by information on the angle of photographing about a series of a plurality of images obtained by photographing, which are sent from the support device 1 for rotary solid. When one image indicating the optimum angle of photographing for observing a site to be diagnosed is selected from among the series of images stored by an operator 8. The image processor 3 presents the information of photographing added to the image to a support device 2 for fluoroscopy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital X-ray imaging apparatus which moves an X-ray tube device and an imaging system device around a subject to pick up or see through the subject from multiple directions, and more particularly to one digital X-ray imaging device. The present invention relates to a digital X-ray imaging apparatus capable of performing imaging of respective images by commonly controlling rotational stereoscopic imaging and normal fluoroscopic imaging of a diagnostic region of a subject by the apparatus.

[0002]

2. Description of the Related Art In recent years, as described in, for example, Japanese Patent Laid-Open No. 2-156778, X-rays are radiated to the subject while rotating the X-ray tube device and the image system device around the subject. 2. Description of the Related Art An X-ray rotation stereoscopic imaging apparatus that can detect a transmitted X-ray image, perform X-ray imaging, and observe a diagnostic region of the subject as a stereoscopic image is becoming widespread. This X-ray rotary stereoscopic imaging apparatus is a gantry body installed on the floor and having an opening for inserting the subject table in the horizontal direction at a substantially central portion of the upright portion, and the opening in the gantry body. A ring-shaped rotary support rotatably provided around the X-ray tube, an X-ray tube device attached to the rotary support to irradiate a subject with X-rays, and an X-ray tube device facing the rotary support Placed X-ray of the subject
A video system device for converting a line image into an optical image and taking the output optical image to convert it into a video signal, and a video signal from the video system device is digitized and the digital signal is processed to form an image. And a display device for displaying an image by inputting an image signal from the image processing device. The image of the diagnostic region of the subject taken from the surroundings is displayed as a moving image by the rotation of the rotary support. Then, it is observed as a stereoscopic image. And
In this type of apparatus, for example, in the examination and diagnosis of cardiovascular diseases, an X-ray image from all directions around the blood vessel can be obtained with a single injection of a contrast agent into a subject, and the image can be stereoscopically displayed. Since it can be observed as an image, there are advantages that the vascular lesion can be confirmed quickly and the injection amount of the contrast agent into the subject can be reduced.

However, in the X-ray rotary stereoscopic imaging apparatus as described above, the operation is performed among a plurality of images taken at different imaging angles by rotating the X-ray tube apparatus and the image system apparatus around the subject. Only one image at a specific imaging angle captures the most accurately the blood vessel lesion portion desired by the person or doctor. At this time, even if one of the images is displayed as a still image for observation, the motion blur caused by photographing during the rotation operation and the rotating image system device are prevented from colliding with the subject. Due to the magnified blur caused by photographing the device at a distance from the subject, the image becomes unclear compared to the image photographed with the photographing system in a stationary state, which is not sufficient for more precise diagnosis.

For this reason, in the diagnostic system using the X-ray rotational stereoscopic imaging apparatus, it is general to combine another X-ray imaging apparatus for precise diagnosis of a vascular lesion. . The other X-ray imaging apparatus includes, for example, a C-arm type supporter, and an X-ray tube device and an image system device are arranged so as to face both ends of the C-arm type supporter. Rotate the device and the image system device together with the C-arm type support device around the subject by an appropriate angle,
An X-ray fluoroscopic imaging apparatus for observing the subject as an X-ray fluoroscopic image in which a contrast agent is injected has been used. And
After the stereoscopic imaging of the subject by the X-ray rotary stereoscopic imaging apparatus is performed to grasp the imaging angle at which the position and the state of the vascular lesion can be observed most accurately, the X-ray fluoroscopic imaging apparatus is used to determine the imaging angle. A method has been used in which, after setting, a video system device is brought into contact with the subject in a stationary state to capture a precise image.

[0005]

However, in such a conventional X-ray rotary stereoscopic imaging apparatus combined with an X-ray fluoroscopic imaging apparatus, the optimum X-ray rotational stereoscopic imaging apparatus for an object is obtained. Since there is no means for transmitting the information of the imaging angle to the X-ray fluoroscopic imaging apparatus which is another apparatus and automatically reproducing the angle, in order to perform a precise diagnosis on a desired site of the subject, For example, the C-arm type supporting device of the X-ray fluoroscopic imaging apparatus has to be manually operated to set the angle to reproduce the optimum imaging angle. At this time, in order to confirm the diagnostic region of the subject, for example, X
It was necessary to inject a small amount of contrast medium into the subject under fluoroscopy and finely adjust the imaging angle while viewing the fluoroscopic image. Therefore, even if, for example, a blood vessel lesion is promptly confirmed by rotational stereoscopic imaging, it takes time to reproduce the optimum imaging angle for precise diagnosis in the stationary state thereafter, and the operation is troublesome. From this, the inspection time as a whole becomes longer, and the X-ray exposure to the subject also increases.

In view of the above, the present invention addresses such a problem, and controls rotational stereoscopic imaging and normal fluoroscopic imaging in common for a diagnostic region of a subject with a single device to capture respective images. It is an object of the present invention to provide a digital X-ray imaging apparatus that can be used.

[0007]

In order to achieve the above object, a digital X-ray imaging apparatus according to the present invention is installed on a floor surface, and a subject table is inserted horizontally in a substantially central portion of an upright portion. A gantry body having an opening, a ring-shaped rotary support rotatably provided in the gantry body around the opening, and an X-ray radiated to a subject attached to the rotary support. The X-ray tube device and the X-ray transmission of the subject, which is arranged on the rotary support to face the X-ray tube device.
A rotation stereoscopic imaging support device for converting a line image into an optical image and imaging the output optical image to convert it into a video signal, and for performing rotational stereoscopic imaging around the subject. A pedestal portion that is installed on the floor surface or the ceiling surface and is movable along the longitudinal direction and the width direction of the subject table, and both ends provided on the pedestal portion extend with the subject table in between. An arm that is arbitrarily movable around the subject, an X-ray tube device that is attached to one end of the arm and irradiates the subject with X-rays, and an X-ray tube device at the other end of the arm. An imaging system device that is arranged so as to face the subject and is capable of approaching and retracting from the subject and that captures a transmitted X-ray image, and a fluoroscopic imaging support device for performing imaging of the subject with the arm stopped. , The image system of the supporting device for rotary stereoscopic photography An image processing device for digitizing a video signal from an image pickup system device of a stationary and fluoroscopic support device, processing the digital signal to form an image and storing the image signal, and an image signal from the image processing device are input. One or a plurality of display devices for displaying as images, a rotation control device for controlling the rotation operation of the rotation support of the rotary stereoscopic imaging support device, and an arm for controlling the movement operation of the arm of the fluoroscopic imaging support device. It comprises a control device and a system control device which takes in an operation command from an operating device and controls the operation of each of the above-mentioned components, and system-controls the rotary stereoscopic photographing support device system and the fluoroscopic photographing support device system. The control is performed in common by the devices, and by selecting and designating any one of the images captured by the rotational stereoscopic support device system by the operation command input from the operating device, the imaging angle position is selected. It is obtained so as to automatically set the arm fluoroscopic supporting device to.

[0008]

In the digital X-ray imaging apparatus having the above-described structure, the information of the shooting angle of each image taken and detected by the rotary support of the rotary stereoscopic imaging support device during rotation is sent to the image processing device. The image processing apparatus stores a series of each of the plurality of images obtained by the photographing with the information of the photographing angle sent from the rotational stereoscopic photographing supporting device added thereto, and stores the stored series of images. When one image showing the optimum photographing angle for observing a certain diagnosis region is selected from the inside by the operation device, the image processing device uses the information of the photographing angle added to the image as the fluoroscopic supporting device. The support device for fluoroscopic imaging moves the arm so that the taught imaging angle is obtained, and the angular positions of the X-ray tube device and the imaging system device attached to both ends of the arm are automatically adjusted. Reproduction setting It operates as. After that, the subject laid on the subject table is positioned in the imaging region of the fluoroscopic support device, and the imaging system device provided at one end of the arm is brought close to the subject to set the imaging distance. , Take pictures for precise diagnosis. Accordingly, after performing stereoscopic radiography around the subject and confirming, for example, a lesion area, setting and reproduction of an imaging angle for precision diagnosis by normal fluoroscopic imaging can be easily and quickly executed.

[0009]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a system block diagram showing the overall configuration of a digital X-ray imaging apparatus according to the present invention, and FIG. 2 is a front view showing a specific structural example. This digital X-ray radiographing apparatus controls the stereoscopic radiographing and the normal fluoroscopic radiographing for a diagnostic region of a subject in common by one apparatus to take each image. As shown in FIG.
Rotational stereoscopic support device 1 and perspective imaging support device 2
An image processing device 3, a display device 4, and a rotation control device 5.
An arm control device 6, a system control device 7, and an operating device 8.

The rotary stereoscopic imaging support device 1 irradiates the subject 10 with X-rays while rotating the X-ray tube device and the image system device around the subject 10 on the subject table 9, and transmits X-rays thereof. A support device for performing rotational stereoscopic imaging in which a line image is detected, image processing is performed, and captured images are continuously displayed on a display device. As shown in FIG. 2, the gantry main body 11, the rotary support 12, and the X It is composed of a line tube device 13 and a video system device 14. The gantry body 11 rotatably supports an X-ray tube device 13 and an image system device 14 which will be described later, and supports the X-ray tube device X and
This is a main body for radiography, and a substantially circular opening 16 for inserting the subject table 9 in the horizontal direction is formed in a substantially central portion of the upright portion which is installed on the floor surface 15.

Inside the gantry body 11, a rotary supporter 12 is provided as shown in FIG. The rotation supporter 12 rotatably supports the X-ray tube device 13 and the image system device 14, and is formed in a ring shape having a rotation center at the center of the opening 16 and the opening 16 It is provided so that it can rotate around it. Then, a well-known drive mechanism (not shown) rotates in the forward and reverse directions in the directions of arrows C and D. In addition, when the X-ray irradiation angle with respect to the subject 10 is, for example, 360 degrees at maximum, the rotation angle range of the rotary supporter 12 is the acceleration section from the stop position to the start of rotation and the start of X-ray irradiation, and the X-ray irradiation. Is added to the deceleration section from when the rotation ends to when the rotation is stopped, and the maximum is about 500 degrees, for example.

The rotary supporter 12 can be tilted in the head direction and the foot direction of the subject 10 as shown by arrows E and F in FIG. 2 by a known drive mechanism (not shown). The angular range of the tilting movement of the rotary supporter 12 in the directions of the arrows E and F is based on the position where the rotation surface of the rotary supporter 12 is orthogonal to the body axis direction of the subject 10, for example, the subject 10 A maximum of about 30 degrees in the head direction (E direction) and a maximum of about 30 degrees in the foot direction (F direction), for a total of about 60 degrees. The angle of the rotation operation and the tilting operation of the rotary supporter 12 is detected by the encoder 17a which is attached to the outer peripheral surface of the rotary supporter 12 shown in FIG. It is adapted to be detected by the encoder 17b provided on the support shaft of the tilting motion of the rotary support 12 shown in FIG.

The X-ray tube device 13 includes the subject table 9 described above.
The subject 10 laid on the top is irradiated with X-rays, which is fixed to one place on the rotary support 12 and is supplied with a predetermined high voltage from an X-ray controller 36 described later. ing. The image system device 14 converts the transmitted X-ray image of the subject 10 into an optical image and also captures the output optical image to convert it into a video signal. An image intensifier (hereinafter abbreviated as "II") 18 that receives an X-ray image that has passed through 10 and converts it into an optical image, and a television that captures the optical image output from this II 18 and converts it into an electrical signal. It consists of a camera 19. Then, the X-ray tube device 1 is mounted on the rotary supporter 12.
It is arranged so as to face 3.

As shown in FIG. 3, the gantry body 11 including the above-mentioned components is entirely covered with a box-shaped outer cover 20. In addition, the periphery of the opening 16 formed in the central portion for inserting the subject table 9 is covered with a cylindrical cover to protect the subject 10 placed on the subject table 9 and inserted. There is. Therefore, normally, the X-ray is not visible from the subject 10.
The line tube device 13 and the image system device 14 rotate together with the rotary support 12.

The subject table 9 has an upper surface on which the subject 1 is placed.
The horizontal plane parallel to the floor surface 15 shown in FIG. 2 is aligned with the body axis direction and the width direction of the subject 10 so that the diagnosis site can be positioned in the X-ray irradiation area by the X-ray tube device 13 by placing 0 on the bed. It is movably supported by a known support mechanism. In rotational stereoscopic imaging, since X-ray imaging is performed while rotating the X-ray tube device 13 and the image system device 14 around the subject 10,
If the diagnosis part of the subject 10 is not near the rotation center, the diagnosis part may be deviated from the X-ray irradiation area during the imaging. Therefore, the diameter dimension of the opening 16 provided in the gantry body 11 shown in FIG. 3 is not only that the subject table 9 can be inserted, but also that the diagnostic site of the subject 10 is located near the rotation center. Must be as large as possible. The above-described subject table 9 is movable so that the diagnostic region of the subject 10 can be positioned with respect to the X-ray irradiation area of the X-ray tube device 23 of the fluoroscopic support device 2 described later. There is.

On the other hand, the fluoroscopic support device 2 is placed in a stationary state of the X-ray tube device and the imaging system device in order to perform a precise diagnosis of a diagnostic region of the subject 10 on the subject table 9 from a desired angle direction. X-ray is irradiated, the transmitted X-ray image is detected, image processing is performed, and a perspective image is displayed on the display device for performing fluoroscopic imaging. As shown in FIG.
A C-shaped arm 22, an X-ray tube device 23, and an imaging system device 24. The gantry 21 movably supports an arm 22, an X-ray tube device 23, and an imaging system device 24, which will be described later, and is installed on, for example, a ceiling surface 25 and extends along the longitudinal direction and the width direction of the subject table 9. It is movably suspended by rail means.

As shown in FIG. 4, a C-shaped arm 22 is provided at the lower end of the mount 21. The C-shaped arm 22 supports the X-ray tube device 23 and the imaging system device 24 so as to be freely movable around the subject 10.
The slide coupling part 2 provided at the lower end of the gantry 21
6 is slidably fitted in a circular arc direction, and both ends thereof extend so as to sandwich the subject table 9. Then, the C-shaped arm 22 is rotated about the center of the C-shape by the known drive mechanism provided in the slide coupling portion 26 as shown by arrows G and H around the body axis of the subject 10. As shown in FIG. 2, further, as shown in FIG. 2, the subject 1 is moved as indicated by arrows J and K about a point L at the lower end of the gantry 21 as a center.
It is possible to tilt to 0 head direction and foot direction. In addition,
The angle of the sliding motion and the tilting motion of the C-shaped arm 22 in the arc direction is detected by the encoder 27a which is attached to the outer peripheral surface of the C-shaped arm 22 shown in FIG. An encoder 27b provided on the base spindle of the slide coupling portion 26 shown in FIG.
To be detected by.

The X-ray tube device 23 includes the subject table 9
X-rays are radiated to the subject 10 that is laid down and positioned on the C-arm 22 and is attached to one end of the C-shaped arm 22 as shown in FIG. 4, and a predetermined high voltage is applied from an X-ray controller 36 described later. It is being supplied. In addition, the imaging system device 2
Reference numeral 4 denotes a device for converting a transmitted X-ray image of the subject 10 into an optical image and photographing this output optical image to convert it into a video signal. X which is emitted from the X-ray tube device 23 and transmitted through the subject 10 It is composed of a II 28 that receives a line image and converts it into an optical image, and a television camera 29 that captures the optical image output from this II 28 and converts it into an electric signal. As shown in FIG. The other end is arranged so as to face the X-ray tube device 23, and is provided so as to be able to approach and retract with respect to the subject 10. That is, the imaging system support 30 having a structure capable of linear movement with respect to the X-ray tube device 23 is provided at the other end of the C-shaped arm 22, and the linear movement structure of the imaging system support 30 is provided. By attaching the II 28 and the television camera 29 to the above, it is supported by a known drive mechanism (not shown) so that they can approach and retract as indicated by arrows L and M. The image pickup system device 24 is II28.
And a normal X
It may be a line film photographing device. 2 and 4
In the embodiment described above, the gantry unit 21 is shown as being suspended from the ceiling surface 25, but the present invention is not limited to this, and the gantry unit 21 may be installed on the floor surface 15.

The image processing apparatus 3 shown in FIG. 1 digitizes the video signals from the video system device 14 of the rotary stereoscopic photographing support device 1 and the image pickup system device 24 of the fluoroscopic photographing support device 2 and the digital signal. For processing and storing an image to store an image, and an A / D converter 31 for inputting analog video signals output from the TV cameras 19 and 29 of the supporting devices 1 and 2 and converting the analog video signals into digital signals.
And a memory 32 for storing the image data output from the A / D converter 31, and a D / A converter 33 for inputting the image data read from the memory 32 and converting the image data into an analog video signal again. And a mass storage device 34 for storing a large number of image data output from the A / D converter 31.
And a data calculator 3 that takes in image data from the memory 32, the mass memory 34, etc., and performs a required calculation.
It is composed of 5 and 5. The display device 4 receives the video signal output from the image processing device 3 and displays it as an image, and is composed of, for example, one or a plurality of television monitors.

The rotation control device 5 controls the rotation operation of the rotation support device 12 of the rotation stereoscopic imaging support device 1 such as the rotation direction, speed and angle, and detects the actual position of the rotation support device 12. The signals from the encoders 17a and 17b are input. Also, the arm control device 6
Controls the sliding movement and tilting movement of the C-shaped arm 22 of the fluoroscopic support device 2, the approaching and retracting movement of the II 28 to the subject 10, and detects the actual position of the C-shaped arm 22. Encoders 27a, 27b
The signal from is input.

The system control device 7 controls the operation of each of the above-mentioned components. The system control device 7 takes in various operation commands input from the operating device 8 and controls the image processing device 3, the rotation control device 5, and the arm control. A control signal is sent to the device 6, the X-ray controller 36, etc.
(Central processing unit). The X-ray controller 36
Supplies a high voltage to the X-ray tube devices 13 and 23 of the rotary stereoscopic imaging support device 1 and the fluoroscopic imaging support device 2 and controls the X-ray irradiation.

Next, the digital X thus constructed
The operation of the line imaging apparatus will be described. Here, for example, in order to diagnose a vascular lesion in a subject, a catheter is first introduced to a diagnosis site under fluoroscopy using the fluoroscopic support device 2, and then the rotational stereoscopic support device 1 is installed. Using the II18 shown in Fig. 1, a 360-degree imaging method is implemented in which the imaging starts from the position of the Q point, makes one rotation in the direction of the arrow C, and ends the imaging at the Q point, and finally again for the fluoroscopic imaging. An example will be described in which the support device 2 is used to perform imaging for precise diagnosis in a stationary state.

First, in FIG. 2, the subject 10 laid on the subject table 9 is positioned in the X-ray irradiation area by the X-ray tube device 23 and the II 28 of the fluoroscopic support device 2 and under X-ray fluoroscopy. A catheter is introduced to the diagnostic site for injecting a contrast medium. In this case, when the catheter is introduced, the X-ray irradiation direction is not angled with respect to the subject 10,
As shown in FIGS. 2 and 4, the II 28 is positioned right above the subject 10. When the catheter introduction to the diagnosis site of the subject 10 is completed in such a state,
In FIG. 2, the subject table 9 is horizontally moved in the direction of the arrow N, the diagnostic region of the subject 10 is inserted into the gantry body 1, and the subject table 9 is positioned near the imaging center of rotational imaging by the rotational stereoscopic imaging support device 1. Position.

Next, when the operator operates the rotation supporter operation switch provided on the operation device 8, the rotation supporter 12 is tilted in the directions of arrows E and F shown in FIG. Then, it is rotated in the directions of arrows C and D shown in FIG. 1 so that the II 18 is positioned at the point P, which is the shooting preparation position, and then stopped. After that, when a radiographing start operation is performed by the operating device 8, a contrast medium is injected from a publicly known contrast medium injecting device (not shown) into the diagnostic region of the subject 10 through the catheter, and the rotary support 12 is moved in the direction of arrow C. The rotation is started to reach a predetermined rotation angular velocity immediately before the II 18 reaches the point Q of the photographing start position, and then the steady rotation is continued.

When the encoder 17a detects that the II18 has reached the point Q, the detection signal is sent to the rotation control device 5, and the rotation control device 5 sends the input detection signal to the system control device 7. To do. The system control device 7 sends a control signal for starting imaging to the X-ray controller 36 in response to the input of the detection signal. Then, from this time point, the X-ray controller 36 generates a pulsed high voltage of, for example, 4 ms and supplies it to the X-ray tube device 13. As a result, pulsed X-rays are emitted from the X-ray tube device 13,
The subject 10 on the subject table 9 is irradiated. The X-ray image that has passed through the subject 10 in this state is incident on the II 18 and converted into an optical image, and this output optical image is captured by the television camera 19.

Next, the video signal output from the television camera 19 is input to the A / D converter 31 in the image processing apparatus 3, converted into a digital signal, and stored in the storage unit 32 as image data. . At this time, the rotary support 12
The angle detection signals from the encoders 17a and 17b provided in the above are input to the image processing device 3 via the rotation control device 5 and the system control device 7, and are stored in the storage device 32 together with the image data. In this way, the image data with the imaging angle information around the subject 10 sequentially imaged during the rotation in the direction of the arrow C shown in FIG. 1 is stored in the storage device 32 and read from the storage device 32. Image data is D /
The A converter 33 converts the analog image signal. Then, this image signal is sent to the display device 4, and a plurality of continuous images are sequentially displayed. The images continuously displayed on the display device 4 are observed as a stereoscopic image due to the afterimage effect of the human eye because the X-ray irradiation direction on the subject 10 is different for each image.

As described above, the rotary support 12 is continuously rotated to perform rotational stereoscopic imaging on the subject 10, and
When 18 rotates 360 degrees in the direction of the arrow C shown in FIG. 1 and reaches the point Q at the photographing end position, the encoder 17a detects this and the rotation control device 5, the system control device 7, and the X control device.
The X-ray emission from the X-ray tube device 13 is stopped via the line controller 36. At the same time, the system control device 7
Causes the rotation support device 12 to stop the rotation of the rotation support device 12, starts deceleration from the Q point, and stops the rotation at the R point. This completes a series of rotational stereoscopic photography. After that, in order to perform rotational stereoscopic imaging on the same site or a different diagnostic site, the same procedure as described above may be repeated.

After the rotational stereoscopic photographing is completed as described above, in order to reproduce the photographed image, the image reproducing switch provided on the operation unit 8 is operated. Then, the inputted reproduction command is sent to the image processing device 3 via the system control device 7, and a series of rotary stereoscopically photographed images stored in the mass storage device 34 are sequentially read out, and the D / A converter 33 is set. Through the display device 4, continuous images are reproduced and displayed. As a result, the operator observes a three-dimensional image of the blood vessel lesion area with the continuously displayed moving images, and then selects one image of the photographing angle at which the region of interest of the blood vessel lesion area can be seen most clearly. . Then, the image reproduction switch is operated again to display the selected one image on the display device 4 as a still image.

From this state, the fluoroscopy support device 2 is used to shift to the fluoroscopy in the stationary state. That is,
The operator operates an image selection switch provided on the operation device 8. Then, the input selection command is sent to the image processing device 3 via the system control device 7, and the shooting angle information recorded in addition to the image currently displayed on the display device 4 is read. Then, the photographing angle information is sent from the image processing device 3 to the system control device 7, and the system control device 7 uses the photographing angle information sent to the arm control device 6 as a target value to form the C-shaped arm 22. A command signal is issued to cause the slide motion and tilt motion in the arc direction. The arm control device 6 inputs the above-mentioned command signal and controls a known drive mechanism (not shown) to move the C-shaped arm 22, and the C-shaped arm 22 takes an image based on the actual position signals from the encoders 27a and 27b. The movement of the C-shaped arm 22 is stopped at a position where the angle matches the target value.

When the position of the imaging angle by the C-shaped arm 22 is automatically set in this way, the object table 9 is moved in the direction of the arrow O in FIG. 2, and the diagnostic region of the object 10 is the X-ray tube device 23. And position so that it enters the X-ray irradiation area by II28. Then, by operating the II moving switch provided on the operation device 8, the II 28 descends in the direction of arrow L in FIG. 4 to approach the subject 10 and stop at an appropriate position where the II 28 contacts the subject surface. . In this state, when the operator operates the operation device 8 to perform an imaging start operation, the injection of the contrast agent from the above-mentioned contrast agent injector through the catheter is started, and the system controller 7 causes the X-ray controller 36 to operate. An imaging start control signal is sent to the X-ray controller 36, and a high voltage is supplied from the X-ray controller 36 to the X-ray tube device 23 to irradiate the subject 10 with X-rays.

The X-ray image transmitted through the subject 10 is II
The image signal is converted into a video signal by the 28 and the television camera 29, and the video signal is input to the image processing apparatus 3 where the image processing is performed to form an image and the image is stored. In this way, fluoroscopy is performed a proper number of times, the obtained image is displayed on the display device 4, and a doctor or the like observes this image to perform a precise diagnosis of the vascular lesion of the subject 10. In addition, when there are two or more images with a suitable photographing angle by the rotational stereoscopic photographing, the photographing procedure may be repeated a plurality of times by changing the photographing angle of the supporting device 2 for fluoroscopic photographing.

In the above description, in the rotary stereoscopic photographing, the rotary photographing is performed with the tilt angle of the rotary support 12 shown in FIG. 2 in the directions of arrows E and F fixed at a certain angular position. However, the rotation photographing may be performed while tilting the rotary support 12 in the directions of the arrows E and F. Further, the arrow C of the rotary support 12 shown in FIG.
While the rotation operation in the D direction is stopped, the tilting operation in the arrow E and F directions shown in FIG. Further, the diagnosis site of the subject 10 can be applied not only to the diagnosis of a blood vessel lesion part, but also to the diagnosis of another site where diagnosis by rotational stereoscopic imaging is effective, such as lung cancer examination.

[0033]

Since the present invention is constructed as described above,
The information of the photographing angle of each image photographed and detected while the rotary support of the rotation stereoscopic photographing support device is rotating is sent to the image processing device, and this image processing device receives each of the series of plural sheets obtained by the photographing. The image is stored in a state in which the information on the image capturing angle sent from the above-mentioned rotary stereoscopic image capturing device is added, and the optimal image capturing angle for observing a certain diagnostic region from the stored series of images is shown. When one image is selected by the operation device, the image processing apparatus teaches the information on the photographing angle added to the image to the fluoroscopic supporting device,
The above-mentioned fluoroscopic imaging support device moves the arm so as to have the taught imaging angle, and automatically reproduces and sets the angular positions of the X-ray tube device and the imaging system device attached to both ends of the arm. You can Accordingly, after performing stereoscopic radiography around the subject and confirming, for example, a lesion area, setting and reproduction of an imaging angle for precision diagnosis by normal fluoroscopic imaging can be easily and quickly executed. Therefore, it is possible to shorten the examination time for the diagnosis of the subject as a whole and reduce the X-ray exposure to the subject.

[Brief description of drawings]

FIG. 1 is a system block diagram showing an overall configuration of a digital X-ray imaging apparatus according to the present invention.

FIG. 2 is a front view showing a specific structural example of the digital X-ray imaging apparatus.

3 is a side view showing the support device for rotational stereoscopic photography as seen from the line AA in FIG.

FIG. 4 is a side view showing the fluoroscopic support device as viewed from the line BB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Support device for rotational stereoscopic photography 2 ... Support device for fluoroscopic imaging 3 ... Image processing device 4 ... Display device 5 ... Rotation control device 6 ... Arm control device 7 ... System control device 8 ... Manipulator 9 ... Subject table 10 ... Subject 11 ... Gantry body 12 ... Rotary supporter 13,23 ... X-ray tube device 14 ... Image system device 16 ... Opening 18,28 ... II 19,29 ... TV camera 21 ... Cross part 22 ... C-shaped arm 24 ... Imaging system device 36 ... X-ray control unit

Claims (1)

[Claims] 1. A gantry main body having an opening for horizontally inserting a subject table, which is installed on a floor surface and substantially in the center of an upright portion, and rotates around the opening in the gantry main body. A ring-shaped rotary supporter provided so as to be possible, an X-ray tube device that is attached to the rotary supporter and irradiates the subject with X-rays, and a subject that is arranged on the rotary supporter so as to face the X-ray tube device. For stereoscopic imaging for performing rotational stereoscopic imaging around the subject, having a video system device for converting the transmitted X-ray image of the optical image into an optical image and capturing the output optical image for conversion into a video signal. A support device, a pedestal portion that is installed on the floor or ceiling surface and is movable along the longitudinal direction and the width direction of the subject table, and both ends of the pedestal portion sandwich the subject table. Stretch with and move freely around the subject An arm which is the ability to subject attached to one end of the arm X
X-ray tube device for irradiating X-rays, and X at the other end of the arm
An imaging system device that is arranged so as to be opposed to the subject and is capable of approaching and retracting the subject and that captures a transmitted X-ray image, and is a fluoroscopic radiograph for performing the photographing of the subject with the arm stopped. Image processing apparatus for digitizing the video signals from the supporting device for the stereoscopic imaging, the video system device of the supporting device for rotary stereoscopic photography and the imaging system device of the supporting device for fluoroscopic photography, and processing the digital signals to construct and store an image. A device, one or a plurality of display devices for inputting an image signal from the image processing device and displaying it as an image, and a rotation control device for controlling the rotation operation of the rotation support of the rotation stereoscopic imaging support device, An arm control device for controlling the movement operation of the arm of the fluoroscopic support device, and a system control device for fetching an operation command from an operation device and controlling the operation of each of the above-mentioned constituent elements are provided. The system control device commonly controls the rotary stereoscopic photographing support device system and the fluoroscopic photographing support device system, and an arbitrary image photographed by the rotary stereoscopic photographing support device system is operated by an operation command input from the operation device. A digital X-ray imaging apparatus characterized in that the arm of the fluoroscopic supporting apparatus is automatically set to the imaging angle position by selectively designating one of the above.