JP2000262502A - Medical x-ray device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a three-dimensional image and a two-dimensional image whose angle of fluoroscoping is variable with a single device by providing a means to set optionally the angle of irradiation of X-rays in the axial direction of the body of a subject in the first supporting member and providing a means to arrange an image receiving means in opposition to the set angle of irradiation in the second supporting member. SOLUTION: An X-ray tube 2 is supported movably on a curved surface around an isocenter Z formed in an arm 1 supporting the X-ray tube 2 and fixed to a rotating plate 7 along a curved guide 3 and similarly an arm 4 fixed to the rotating plate 7 is disposed in a position opposite to the X-ray tube 2, interposed by a subject. An X-ray image receiving means 5 that detects X-rays transmitting the subject is supported movably in a curved surface 6 around the isocenter Z along the curved guide 6. The rotating plate 7 is supported on a supporting frame 8 supporting the rotating plate 7 through at least a pair of bearings 11 and rotated through a belt 10 or the like by the driving of a driving portion 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical X-ray apparatus, and more particularly, to an IVR using an angiographic examination or an X-ray diagnostic apparatus.
The present invention relates to a medical X-ray apparatus having a function of obtaining a two-dimensional X-ray image and a three-dimensional X-ray image with a single apparatus suitable for a treatment called (Interventional Radiology, catheter surgery under X-ray fluoroscopy).

[0002]

2. Description of the Related Art Medical X-ray fluoroscopic apparatuses such as X-ray fluoroscopic tables and circulatory organ X-ray examination apparatuses have become indispensable in the field of diagnosis. Is also being used. This treatment is performed by inserting a catheter with various instruments attached to the tip under fluoroscopy into the blood vessels and organs of the subject. Therefore, it has a great merit that pain given to a subject can be reduced and treatment can be performed at a low cost, and therefore, it is rapidly spreading. Such a method of treatment is known as IVR (Interventi
onal Radiology).

In this IVR, it is desirable to be able to three-dimensionally grasp the position and shape of the target part. For this purpose, a three-dimensional image is acquired by an X-ray CT apparatus, the position and shape of the target part are grasped based on the three-dimensional image, and an X-ray generation system and X-ray detection are performed on the grasped target part. A circulatory organ X-ray diagnostic apparatus supporting the system with a C-shaped arm (described in "Medical and Dental Publishing Co., Ltd .: Medical Radiology Course 13, Radiation Diagnostic Equipment Engineering, FIG. 4-7 on page 156") is used. X-rays are radiated from various angles, and treatment is performed with reference to a two-dimensional fluoroscopic image of the target site acquired by the circulatory organ X-ray diagnostic apparatus. Was performed using

The circulatory organ X-ray diagnostic apparatus using the C-shaped arm is configured to perform various rotation and movement operations such as rotation of an arm and slide movement so that fluoroscopy and imaging can be performed from various directions. Prior to the surgery, as described above, the position and shape of the treatment target site are confirmed based on the three-dimensional X-ray image by the X-ray CT apparatus, and the three-dimensional
Diagnosis and treatment are performed based on the position and shape obtained by the line image and the two-dimensional X-ray image seen through the circulatory organ X-ray diagnostic apparatus.

[0005] Such a circulatory organ X-ray diagnostic apparatus and X-ray C
In the method using the T apparatus together, the information obtained during the IVR is only two-dimensional information obtained by the circulatory organ X-ray diagnostic apparatus. In addition, it is not possible to intuitively grasp the positional relationship between the treatment target site and the treatment instrument attached to the distal end of the catheter.

In order to obtain a three-dimensional image using an X-ray CT apparatus, an X-ray image is taken while moving the subject in the body axis direction, and a three-dimensional X-ray image of the subject is obtained from the X-ray image. There is a method using a technique called volume scan or helical scan for reconstructing a line image (stereoscopic X-ray image). However, this volume scan type X-ray CT apparatus has a low resolution in the body axis direction. There is a problem of ending.
If the resolution is low, it may be difficult to accurately grasp the position and shape of the treatment target site, and further improvement in the resolution is desired.

As a method for improving the resolution, a method is conceivable in which an X-ray image is captured by lowering the moving speed of the subject with respect to the rotation speed of the imaging system.
Cannot achieve the required responsiveness. Further, in the method of using the X-ray CT apparatus and the circulatory organ X-ray inspection apparatus together, it is necessary to equip the X-ray CT apparatus and the circulatory organ X-ray diagnostic apparatus which require an expensive and large installation space. Therefore, there are problems in terms of economy and installation space.

On the other hand, an imaging system comprising an X-ray source for irradiating cone-beam X-rays, an X-ray image intensifier (hereinafter referred to as “X-ray II”), and a television camera is provided. X called the three-dimensional X-ray CT device used
Using a three-dimensional X-ray CT system
A method of acquiring a line image and a three-dimensional X-ray image is considered.
In the apparatus, it is necessary to place a subject in a cavity provided in a gantry, and there is a problem that a working space for an operator to perform a smooth treatment cannot be sufficiently secured. Furthermore, in the case of the IVR, it is necessary to constantly observe the state of the expression of the subject in order to quickly respond to sudden changes in the condition of the subject during the operation. In a state in which the subject is placed in the cavity thus obtained, it is difficult to observe the state of the facial expression and the like of the subject, and there is a problem that it is not possible to quickly respond to sudden changes in the body condition.

In order to solve the problems of the method of using the X-ray CT apparatus and the circulatory organ X-ray inspection apparatus together and the method of using the X-ray CT apparatus called a three-dimensional X-ray CT apparatus, An X-ray apparatus that can generate a three-dimensional X-ray image of a patient and a two-dimensional X-ray image obtained by X-ray fluoroscopy with the same apparatus and perform diagnosis and treatment is proposed in Japanese Patent Application No. 10-306238. In this apparatus, an X-ray tube as an X-ray source is provided at one end of a support member, image receiving means is provided at the other end, and means for rotating these members are provided. An X-ray image can be obtained from the entire circumference of the subject, and not only a two-dimensional fluoroscopic image of the subject but also a three-dimensional X-ray image (an image of an arbitrary tomographic plane or a stereoscopic X-ray image. (Hereinafter referred to as a cone beam CT image).

In this apparatus, a space for relatively moving the subject is formed in the center of rotation of the rotating means supporting the imaging system, so that the subject is horizontally moved in parallel with the center axis of rotation. Alternatively, since the imaging area of the imaging system can be moved from the head to the foot only by moving the rotating means horizontally, an X-ray image can be taken at any position from all directions. Then, the X-ray image generating means generates a three-dimensional X-ray image from the X-ray image captured from all directions of the subject by a well-known reconstruction operation, thereby obtaining a three-dimensional X-ray image of the imaging site. be able to. Further, in the two-dimensional image, when the fluoroscopic direction of the treatment site is determined based on the three-dimensional image, the rotation position of the support member is fixed at the position in the fluoroscopic direction, and the two-dimensional image is viewed through the direction determined by the rotational position. Get a two-dimensional image.

[0011] With such an apparatus, the position and shape of the treatment site of the subject are grasped from the three-dimensional image, and treatment is performed with reference to the two-dimensional image based on the grasp. A three-dimensional image is generated and confirmed by the above method without moving the examiner.

[0012]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application No. Hei 10-3 is disclosed.
The X-ray apparatus proposed in 06238 does not consider the following points. That is, in the IVR, the position and shape of the treatment site of the subject are grasped from a three-dimensional image, and the grasped treatment region is treated while viewing a two-dimensional fluoroscopic image from multiple directions. However, the X-ray apparatus proposed in Japanese Patent Application No. 10-306238 can see through an arbitrary angle on the center of rotation, but cannot slide in the horizontal direction with the support member. Therefore, since the fluoroscopic angle with respect to the body axis direction of the subject cannot be changed, it is impossible to observe the treatment site from these directions, and the problem remains that the treatment range by the IVR is limited. That is, since there is no function of disposing the X-ray source and the X-ray image receiving device along the body axis of the subject, it may not be possible to depict blood vessels and the like from various angles.

In view of the above problems, it is an object of the present invention to provide an IVR that can obtain a three-dimensional image and a two-dimensional image in which the perspective angle with respect to the body axis direction of a subject can be varied using the same device.
It is an object of the present invention to provide a medical X-ray apparatus that is suitable for medical equipment.

[0014]

An object of the present invention is to provide an X-ray source for irradiating an object with X-rays radially at one end of a support member, and an image receiving means for capturing an X-ray image of the object at the other end. Is provided to form an imaging system, the support member includes an arc-shaped support member having a rotation center axis coinciding with the rotation center axis of the imaging system, and the X-ray source extending from the arc-shaped support member at one end. Is formed from a first support member provided with a second support member extending from the arc-shaped support member and provided with the image receiving means at one end, and the X-ray source and the image receiving means are arranged around the subject. In a medical X-ray apparatus comprising an X-ray image generating means for generating a three-dimensional X-ray image of the subject from an X-ray image from the entire circumferential direction taken by rotating and imaging, the first supporting member Arbitrarily set the X-ray irradiation angle with respect to the body axis direction of the subject Means provided, is achieved by providing means for positioning the image receiving means so as to face the irradiation angle to the set to the second support member. in this way,
The irradiation angle of X-rays with respect to the body axis direction of the subject can be set arbitrarily, and the image receiving means is arranged to face the set irradiation angle. It is possible to see from an angle, and the three-dimensional X
IVR can be performed with reference to a two-dimensional perspective image from multiple directions based on the line image. As a result, the position and shape information of blood vessels and organs that are complicated intricately become rich,
It is possible to provide a medical X-ray apparatus that contributes to improvement of diagnosis and treatment.

Further, an X-ray irradiation angle with respect to the body axis direction of the subject is set, and the X-ray source and the X-ray are arranged in a state where the X-ray image receiving means is arranged so as to face the set irradiation angle.
By generating a three-dimensional X-ray image of the subject from an X-ray image from all directions taken by rotating and moving the line image receiving means around the subject, it is possible to make various movements with respect to the body axis of the subject. Since it is possible to refer to a three-dimensional image from various angles, diagnosis information is abundant, and diagnosis and treatment can be further improved. The X-ray irradiation angle with respect to the body axis direction of the subject and the means for arranging the X-ray image receiving means in opposition to the set irradiation angle, the first support member and the second support member are formed in an arc shape. And a means for sliding the X-ray source on the first support member and a means for sliding the X-ray image receiving means on the second support member. In this embodiment, since the X-ray irradiation angle is determined by the arc shapes of the first support member and the second support member, the function of variably setting the X-ray irradiation direction on the X-ray source and the X-ray image receiving means is unnecessary. .

As another form, the first support member and the second support member are linearly shaped, and the X-ray source is slid on the first support member, and the X-ray source is formed by a means. Means for arbitrarily setting the irradiation direction of X-rays by rotating the X-ray image receiving means and means for sliding the X-ray image receiving means on the second support member; There is a form in which a means for facing the irradiation direction is provided. In this form,
Since the first support member and the second support member can be made linear, the manufacture of these support members and their attachment to the arc-shaped support member are simplified.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings together with embodiments (examples) of the invention. In all the drawings for describing the embodiments of the present invention, components having the same functions are denoted by the same reference numerals, and their repeated description will be omitted.

(First Embodiment) FIG. 1 is a configuration diagram of a medical X-ray apparatus according to a first embodiment of the present invention. First, the configuration of the medical X-ray apparatus according to the first embodiment of the present invention will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes an arm that supports an X-ray tube 2 for irradiating an object (not shown) with X-rays and is fixed to a rotating plate 7. The curved guide section 3 is configured to be movable within a curvature plane centered on the isocenter Z.

Reference numeral 4 denotes an X-ray image receiving means 5 for detecting X-rays transmitted through the subject disposed at a position facing the X-ray tube 2 across the subject (not shown) and converting the X-rays into electric signals.
And the X-ray receiving means 5 faces the X-ray tube 2 in a curvature plane centered on the isocenter Z by a curved guide section 6 on the arm 4 on the arm 4. It is configured to be movable. X-ray receiving means 5
May be configured by an image intensifier and a television camera or a CCD (charge coupled device) camera, or may be a flat panel type two-dimensional sensor using a semiconductor detector.

The rotary plate 7 is rotatably supported by a support frame 8 that supports the rotary plate via at least a pair of bearings 11, and applies a rotational driving force from a driving unit 9 to the belt 1.
0 to the bearing 11 to rotate the rotary plate 7. The driving unit 9 includes a motor 9a fixed to the support frame 8, a pulley 9b fixed to a motor shaft of the motor 9a, and a brake 9 for stopping the rotation of the motor 9a.
and a detector 9d for detecting the number of rotations of the motor 9a. The detector 9d is used to detect the actual rotation speed of the motor 9a and control the rotating plate 7 to a predetermined rotation speed (a control device is omitted). With this configuration, the arm 1 fixed to the rotating plate 7
The arm 4 can be rotated about a horizontal axis including the isocenter Z, and the X-ray image receiving means 5 and the X-ray tube 2 can be rotated to face each other.

FIG. 2 is a diagram showing a configuration example of the driving means of the X-ray tube 2 and the driving means of the X-ray image receiving means 5 of FIG. In FIG. 2, the X-ray tube 2 is fixed to a frame 15, and the arm 1 has a curved guide section 3 and an internal gear 16. The curved guide 3 of the arm 1 is provided with at least a pair of rollers 12, and the rollers 12 allow the curved guide 3 of the frame 15 to slide relative to the frame 15. It is slid by the driving force.

The drive unit 13 includes a motor 13a fixed to the frame 15, a brake 13b, and these motors 13a,
A gear 14 fixed to the shaft end of a brake 13b, and a detector 13c for detecting rotation of the motor 13a, the gear 14 fixed to the shaft end and the internal gear 1 provided on the arm 1.
6 is configured to transmit the driving force of the motor 13 a to the curved guide portion 3 by meshing with the curved guide portion 3.

On the other hand, the X-ray image receiving means 5 is fixed to a frame 20, and the arm 4 has a curved guide portion 6 and an internal gear 21. The curved guide section 6 of the arm 4 is provided with at least a pair of rollers 22, and the roller 22 enables the curved guide section 6 of the frame 20 to slide with respect to the frame 20. It is slid by the driving force.

The drive unit 23 includes a motor 23a fixed to the frame 20, a brake 23b, and these motors 23a,
A gear 24 fixed to the shaft end of the brake 23b and a detector 23c for detecting the rotation of the motor 23a, the gear 24 fixed to the shaft end and the internal gear 21 provided on the arm 4
Are configured to transmit the driving force of the motor 23a to the curved guide portion 6 by meshing with each other.

Next, the operation of the first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 and FIG. 3 showing the configuration of a control device of this device. The operator instructs the operating device 30 to select a fluoroscopic image or a cone beam CT image. According to this instruction, when the function of acquiring a fluoroscopic image is selected, the output of the X-ray receiving means 5 is input to the image processing means 40 by the switch 36, and when the function of acquiring a cone beam CT image is selected, The output of the X-ray image receiving means 5 is switched by the switch 36 to the image processing means 5.
Input to 0.

(1) When the Function of Obtaining a Perspective Image is Selected When the operator selects the function of obtaining a fluoroscopic image, the system controller 31 sends the output of the X-ray image receiving means 5 to the switching unit 36. Image processing means 4 for processing data
0, and a slide position control command for positioning the X-ray tube 2 and the X-ray image receiving means 5 in the direction desired to be seen through the X-ray tube slide control means 33 and the X-ray image slide control means 32. Send to

Based on these sliding position control commands, X
Drive units 13 and 23 that slide the X-ray tube 2 and the X-ray image receiving means 5
The motors (13a, 23a) rotate to rotate the gears (14, 24) provided at the shaft ends of the motors, and the rollers (12, 2) pass through the internal gears (16, 21) meshed with the gears.
The frame (15, 20) slidably held by (2) is slid, and the X-ray image receiving means 5 and the X-ray tube 2 supported by the frame (15, 20) are arranged to face each other.

In order to confirm the running direction of the blood vessel, etc., X
It is necessary to align the X-ray tube 2 and the X-ray image receiving means 5 at an arbitrary rotational position. In this case as well, the system controller 31 sends the rotating plate 7 based on a command from the operating device 30 operated by the operator. Plate rotation control means 3 for controlling the rotation of the plate
Send the command to 4. The motor 9a of the drive unit 9 rotates based on this command, rotates the pulley 9b connected to the motor shaft, and is rotatable with respect to the belt 10 and the support frame 8 connecting the pulley 9b and the rotary plate 7. Bearing 1 supported on
When the rotating plate is rotated via 1, the brake 9 c is actuated and stopped at a desired angle when the rotation angle reaches the target rotation angle position, and the X-ray tube 2 and the X-ray image receiving means 5 are kept stopped. .

At the rotation angle of the rotary plate 7 and the sliding position between the X-ray tube 2 and the X-ray image receiving means 5, a system controller 31 is provided based on a command from the operator's operation unit 30.
The X-ray control means 35 generates an X-ray control amount for generating X-rays corresponding to the X-ray condition from the X-ray tube, and generates X-rays based on the control amount from the X-ray tube 2 and irradiates the object. I do. The X-ray transmitted through the subject is input to the X-ray image receiving means 5, converted into an electric signal, and the analog signal converted into the electric signal is input to the A / D converter 41 of the image processing means 40. I do.

The analog signal is converted into a digital signal by an A / D converter 41, sent to an image processing unit 42 and stored in a frame memory 43. The image processing unit 42 performs image processing such as contrast and gamma characteristic conversion on the transmitted digital image signal, and sends the digital image signal to a display gradation processing unit 44 that performs gradation processing. The digital image signal that has been subjected to the gradation processing in the display gradation processing section 44 is converted into a D / A converter 45.
, And a fluoroscopic image is displayed on the display 60.

(2) When the function of acquiring a cone beam CT image is selected When the operator selects the function of acquiring a cone beam CT image, the system controller 31
To the image processing means 50 for processing the cone beam CT image data, and the X-ray tube 2 and the X-ray receiving means 5 are arranged to face each other on a vertical axis including the isocenter Z. Is transmitted to the X-ray tube slide control means 33 and the X-ray image reception slide control means 32 for controlling the slide position.

Based on these sliding position control commands, X
Drive units 13 and 23 that slide the X-ray tube 2 and the X-ray image receiving means 5
The motors (13a, 23a) rotate to rotate the gears (14, 24) provided at the shaft ends of the motors, and the rollers (12, 2) pass through the internal gears (16, 21) meshed with the gears.
The frame (15, 20) slidably held by (2) is slid, and the X-ray image receiving means 5 and the X-ray tube 2 supported by the frame (15, 20) are connected to a vertical axis including the isocenter Z. Stop in a state where it faces the line.

At the stage when the preparation such as the positioning of the subject is completed, the operator operates the operating device 30 to rotate the rotating plate rotation control means 34 from the system controller 31 in order to capture a cone beam CT image. A control command is output, and the motor 9a of the drive unit 9 is rotated based on the command,
The rotating plate 7 is rotated in the same manner as described above. When the rotating plate 7 reaches a certain rotation speed, the system controller 31
X-rays are radiated from the X-ray tube 2 via the line control means 35, and X-rays transmitted through the subject for one rotation of the rotary plate 7 are detected by the X-ray image receiving means 5 and converted into electric signals. .

The signal detected by the X-ray receiving means 7 is A
The X-ray image data from the data collector 51 is converted into a digital signal by the / D converter and stored in the data collector 51, and pre-processing such as logarithmic conversion, gain correction, and offset correction is performed on the X-ray image data from the data collector 51. 52, the pre-processor 52
The X-ray absorption data in the pre-projection direction is calculated by summing the image data from

The data after the product-sum operation by the convolver 53 is back-projected to an image memory 55 described later and a superimposed tomographic image is reconstructed by the back projector 54. The reconstructed tomographic image is reconstructed by the back projector 54. Image memory 55
And a three-dimensional image generated via an image converter 56 for setting a CT value in a desired range with respect to the data relating to the tomographic image reconstructed on the image memory 55 is displayed on the display 60.

Note that the above cone beam CT image is
An example of acquiring an image photographed in a state where the X-ray image receiving means 5 and the X-ray tube 2 face each other on a vertical axis including the isocenter Z has been described.
The X-ray tube 2 and the X-ray image receiving means 5 are opposed to each other about the isocenter Z on a straight line having an arbitrary angle with respect to the vertical axis including the isocenter Z under the control of the X-ray receiving slide control means 3 It is also possible to take a picture with the arrangement.

As described above, according to the first embodiment shown in FIG. 1, the position and the shape of the target part are grasped from the three-dimensional image, and based on the result, the fluoroscopy from multiple directions, in particular, the fluoroscopy in the body axis direction is performed. Since the angle can be set arbitrarily, diagnosis information of blood vessels and organs that are complicated intricately becomes rich, and diagnosis and treatment can be further improved.

(Embodiment 2) FIG. 4 is a configuration diagram of a medical X-ray apparatus according to Embodiment 2 of the present invention. The medical X-ray apparatus according to the second embodiment shown in FIG. 4 includes an arm 70 and an arm 72 which slide and hold the X-ray tube 2 and the X-ray image receiving means 5 at arbitrary positions.
Is an example in which is a linear shape. When the arm 70 and the arm 72 are formed in a linear shape, the structure and the assembly are simplified, but a means for changing the X-ray tube 2 and the X-ray image receiving means 5 in an arbitrary perspective direction is required. This means is shown in FIG. Therefore, the configuration of the second embodiment of the present invention will be described in detail with reference to FIGS.

In FIG. 4, reference numeral 70 denotes a subject (not shown).
Is a linear arm fixed to a rotating plate 7 for supporting an X-ray tube 2 for irradiating the X-ray with the X-ray tube.
It is configured so as to be able to move linearly on the upper part 0 by a linear guide part 71.

Reference numeral 72 denotes the X with a subject (not shown) interposed therebetween.
A linear arm fixed to the rotary plate 7 that supports X-ray image receiving means 5 that detects X-rays transmitted through the subject and converts the X-rays into electric signals, which is disposed at a position facing the tube 2 The X-ray image receiving means 5 is configured to be linearly movable on the arm 72 by a linear guide 73 so as to face the X-ray tube 2.

The rotary plate 7 is rotatably supported by a support frame 8 that supports the rotary plate via at least a pair of bearings 11, and applies rotational driving force from a driving unit 9 to the belt 1.
0 to the bearing 11 to rotate the rotary plate 7. The driving unit 9 includes a motor 9a fixed to the support frame 8, a pulley 9b connected to a motor shaft of the motor 9a, and a brake 9 for stopping the rotation of the motor 9a.
and a detector 9d for detecting the number of rotations of the motor 9a.

The detector 9d is used for detecting the actual rotation speed of the motor 9a and controlling the rotation plate 7 to a predetermined rotation speed (a control device is omitted). With this configuration, the arm 70 and the arm 72 fixed to the rotating plate 7 can rotate about a horizontal axis including the isocenter Z, and the X-ray image receiving unit 5 and the X-ray tube 2 face each other. Can be rotated.

FIG. 5 is a diagram showing a configuration example of the driving means of the X-ray tube 2 and the driving means of the X-ray image receiving means 5 in FIG. First, the driving means of the X-ray tube 2 will be described. 5, the X-ray tube 2 is fixed to a rotary frame 80. The rotary frame 80 is connected to a sliding frame 83 for sliding the X-ray tube 2 on a straight line of the arm 70 via a bearing 86 and a shaft 87. ing.

The arm 70 includes a linear guide 71 and an internal gear 8.
The linear guide 71 of the arm 70 is provided with at least a pair of rollers 82, and the rollers 82
, The linear guide 71 of the arm 70 can slide.

A sliding drive section 84 serving as the sliding means includes a motor 84a fixed to a sliding frame 83, a brake 84b
A gear 85 fixed to the shaft end thereof;
A gear 84 fixed to the shaft end and an internal gear 81 provided on the arm 70 mesh with each other to slide the X-ray tube 2.

X from the X-ray tube 2 for changing the fluoroscopic direction
The radiation direction of the line is determined by the mechanism described below.
It can be varied by rotating 0. That is,
The rotating frame 80 is fixed to one end of a shaft 87 having an outer diameter substantially matching the inner diameter of at least a pair of bearings 86 provided on the sliding frame 83, and the bearing 86 and the shaft 87 are fitted to each other. With respect to the sliding frame 83. The rotation drive unit 89 for rotating the rotating frame 80 includes a sliding frame 83
, A motor 89a, a brake 89b, a pulley 88 fixed to the shaft end thereof, and a detector 89c for detecting the number of rotations of the motor 89a. The X-ray tube 2 is rotated by transmitting the rotational driving force of the motor 89a to the rotary frame 80. As a result, the X-ray tube 2 can be variably set in any fluoroscopic direction.

Next, the driving means of the X-ray image receiving means 5 will be described. In FIG. 5, the X-ray receiving means 5 includes a rotating frame 91.
And a rotating frame 91 is provided with a bearing 93 and a shaft 9 on a sliding frame 92 for sliding the X-ray image receiving means 5 on a straight line of the arm 72.
4 are connected. The arm 72 has a linear guide 95 and an internal gear 96.
Is provided with at least a pair of rollers 97.
7 enables the linear guide portion 95 of the arm 72 to slide with respect to the sliding frame 92.

The sliding drive section 98 serving as the sliding means includes a motor 98a fixed to the sliding frame 92 and a brake 98b.
And a gear 99 fixed to the shaft end thereof, and the motor 98a
A gear 98 fixed to the shaft end and an internal gear 96 provided on the arm 72 to slide the X-ray image receiving means 5 to a position opposed to the X-ray tube 2. Move. The X-ray image receiving means 5 rotates the rotating frame 91 by a mechanism described below,
It is arranged in the direction facing the direction of X-ray radiation from the tube.

That is, the rotating frame 91 is provided with a sliding frame 92.
The bearing 9 is fixed to one end of a shaft 94 having an outer diameter substantially matching the inner diameter of at least a pair of bearings 93 provided on the bearing 9.
The shaft 3 and the shaft 94 are fitted, and the shaft 3 rotates about the shaft with respect to the sliding frame 92. A rotation driving unit 100 for rotating the rotating frame 91 includes a motor 100 a fixed to a sliding frame 92.
, Brake 100b, and pulley 1 fixed to its shaft end
01 and a detector 100c for detecting the number of rotations of the motor 100a.
1 and the belt 102, and the rotational driving force of the motor 100a is transmitted to the rotating frame 91 to rotate the X-ray image receiving means 5. As a result, the X-ray image receiving means 5 can be oriented in a direction facing the direction of X-ray radiation from the X-ray tube.

The operation of the medical X-ray apparatus having such a configuration is as follows.
The operation is almost the same as that of FIG. 1 except that the fluoroscopic directions of the X-ray tube 2 and the X-ray image receiving means 5 are changed. That is, the operation of sliding the linear guide portion of FIG. 4 is replaced with the curved guide portion of FIG. 1, and a means for changing the perspective direction of the X-ray tube 2 and the X-ray image receiving means 5 is added thereto. The configuration of the control device is as shown in FIG.

(1) When the function of acquiring a fluoroscopic image is selected When the operator selects the function of acquiring a fluoroscopic image, the X-ray tube sliding control means 33 and the X-ray image receiving sliding control means 32 are used. Then, the slide means of the X-ray tube 2 and the X-ray image receiving means 5 is drive-controlled to dispose the X-ray tube 2 and the X-ray image receiving means 5 at positions facing each other. When it is desired to change the fluoroscopic direction in order to confirm the running direction of the blood vessel, etc., the X-ray tube 2 and the X-ray image receiving means 5 are used by using the X-ray radiation direction control means 110 and the X-ray image reception direction control means 111 The driving of the rotation driving unit is controlled to position the X-ray tube 2 and the X-ray image receiving unit 5 at positions facing each other in an arbitrary perspective direction.

(2) When the function of acquiring a cone beam CT image is selected. When the operator selects the function of acquiring a cone beam CT image, the X-ray tube slide control means 33 and the X-ray image slide control are selected. Using the means 32, the X-ray tube 2 and the X-ray image receiving means 5 are opposed to each other on the vertical axis including the isocenter Z. Further, a cone beam CT image is obtained on a straight line having an arbitrary angle with respect to a vertical axis including the isocenter Z, with the X-ray tube 2 and the X-ray image receiving means 5 being arranged opposite to each other with the isocenter Z as a center. In such a case, the X-ray tube 2 and the X-ray image receiving means 5 are slid to an arbitrary position, and the X-ray radiation direction control means 110 and the X-ray image receiving direction control means 111 are used at the slid positions. The rotation drive means of the X-ray tube 2 and the X-ray image receiving means 5 is drive-controlled to position the X-ray tube 2 and the X-ray image receiving means 5 at positions facing each other in an arbitrary perspective direction.

As described above, according to the second embodiment shown in FIG. 4, the same effect as that of the first embodiment shown in FIG. 1 can be obtained.
Since the shape of the arm supporting the X-ray tube 2 and the X-ray image receiving means 5 can be made linear, the manufacture of this arm and the rotation plate 7
This has the effect of simplifying attachment to the device.

[0055]

As described above, according to the present invention, a three-dimensional image and a two-dimensional image are generated by the same apparatus, and the information on the position and shape of the subject to be diagnosed and treated based on the three-dimensional image is obtained. Based on the perspective at an arbitrary angle with respect to the body axis direction of the subject, a reference is made to a two-dimensional perspective image from multiple directions.
VR can be performed. As a result, the position and shape information of complicated and complicated blood vessels and organs will be abundant,
It is possible to provide a medical X-ray device that contributes to improvement of treatment.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a medical X-ray apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a sliding mechanism of an X-ray tube and an X-ray image receiving unit according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a control device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a medical X-ray apparatus according to a second embodiment of the present invention.

FIG. 5 is a diagram illustrating an X-ray tube, a sliding mechanism of an X-ray image receiving unit, and a rotation driving mechanism according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a control device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 X-ray tube support arm (curve shape) 2 X-ray tube 3, 6 Curve guide part 4 X-ray image receiving means support arm (curve shape) 5 X-ray image receiving means 7 Rotary plate 8 Support frame 9 Rotary plate drive unit 13 X-ray Tube slide drive unit 23 X-ray image receiving unit slide drive unit 31 System controller 32 X-ray image receive unit slide control unit 33 X-ray tube slide control unit 34 Rotating plate rotation control unit 35 X-ray control unit 36 Switching unit 40 Image Processing means (two-dimensional image) 50 Image processing means (three-dimensional image) 60 Display 70 X-ray tube support arm (linear shape) 72 X-ray image receiving means support arm (linear shape) 71, 73 Linear guide portion 84 X-ray tube slide Dynamic drive unit 89 X-ray tube rotation drive unit 98 X-ray image reception unit slide drive unit 100 X-ray image reception unit rotation drive unit 110 X-ray emission direction control unit 111 X-ray image reception direction control unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C093 AA01 AA08 CA21 CA31 CA37 EA02 EB02 EB13 EB17 EC16 EC28 EC33 FB02 FF42 5B057 AA08 BA03 BA12 BA15 BA19 BA23 DA04 DB03 5C054 CA02 CC01 CC04 CF01 CF06 FA00 FD01 HA12

Claims (1)

[Claims] An X-ray source is provided at one end of a support member for radially irradiating an X-ray to a subject, and an image receiving means is provided at the other end for capturing an X-ray image of the subject to form an imaging system. The support member includes an arc-shaped support member having a rotation center axis coinciding with the rotation center axis of the imaging system, and a first support extending from the arc-shaped support member and provided with the X-ray source at one end. A second support member extending from the arc-shaped support member and having the image receiving means provided at one end thereof, and the entire circumference obtained by rotating and moving the X-ray source and the image receiving means around the subject. A medical X-ray apparatus including an X-ray image generating unit configured to generate a three-dimensional X-ray image of the subject from an X-ray image from a direction, wherein the first support member has an X-ray image with respect to a body axis direction of the subject.
A medical X-ray apparatus, comprising: means for arbitrarily setting an irradiation angle of a line; and means for arranging the image receiving means facing the set irradiation angle, provided on the second support member.