JP4737793B2 - X-ray diagnostic equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an X-ray diagnostic apparatus.
[0002]
[Prior art]
An X-ray diagnostic apparatus is an image apparatus that displays the intensity of X-rays transmitted through the body of a subject as a grayscale image, and there are various types of apparatuses depending on the diagnostic application. For example, an X-ray diagnostic apparatus for cardiovascular diagnosis or digestive organ diagnosis can observe a collected X-ray image as a fluoroscopic image on a TV monitor in real time as a moving image, and is excellent in immediacy.
[0003]
FIG. 12 is a diagram showing the appearance of a conventional cardiovascular X-ray diagnostic apparatus.
[0004]
The cardiovascular X-ray diagnostic apparatus has an arm structure for installing an X-ray generation unit 50 for irradiating a subject with X-rays and an X-ray detection unit 51 for detecting and detecting X-ray data that has passed through the body of the subject. Holding device.
[0005]
In general, the arm shape of the holding device can be roughly classified into a C type and a U type. At present, the C type is the mainstream from the viewpoint of improving the efficiency of three-dimensional positioning.
[0006]
The circulating X-ray diagnostic apparatus shown in FIG. 12 shows a C-arm structure holding apparatus as an example. An X-ray generation unit 50 is provided at one end of the C arm 52 and an X-ray detection unit 51 is provided at the other end. A rail is provided on the back surface or side surface of the C arm 52, and the C arm 52 is slidable by being sandwiched between rollers provided in the holder 53.
[0007]
The X-ray detector 51 provided at one end of the C-arm 52 is generally an I.D. I. (Image intensifier) and an optical system. The X-ray detection unit 51 includes I.D. I. X-ray information transmitted through the subject is converted into optical information, and this optical information is collected by an optical lens by an optical system. Then, after being taken into the TV camera and subjected to predetermined processing by the image processing unit, an X-ray fluoroscopic image is displayed.
[0008]
By the way, generally I.D. I. X-ray detection by I.S. I. Can be obtained with less influence of the penumbra of the X-ray tube. However, this (I.I. + optical system) is heavy and long, and the conventional structure has a limit to the accessibility to the subject. That is, in the mechanism of the conventional holding device, the I.D. I. The front cannot be angled so that it touches the body surface. Further I.D. I. In order to achieve close contact with the subject, I. The tilting function of the detection surface is required.
[0009]
On the other hand, as an X-ray image detection device, an X-ray flat panel detector has recently been frequently used. This planar detector is called I.D. I. If it is used for the X-ray detection unit instead of, it can be considered that the rotation is relatively easy.
[0010]
[Problems to be solved by the invention]
However, when a flat detector is attached to one end of the C-arm and tilted, the SID (Source Image Distance: distance between the X-ray tube focus and the detector image-receiving surface) changes depending on the position of the flat detector. That is, one edge of the tilted detector has a large SID, and the other edge has a small SID. For this reason, the X-ray diaphragm must narrow down the X-ray bundle radiated from the X-ray tube into a trapezoid, but the conventional X-ray diaphragm mechanism cannot cope with this complicated diaphragm.
[0011]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems, and provides an X-ray diagnostic apparatus that enables an X-ray detector to be closely attached to a subject and that can easily obtain a better X-ray fluoroscopic image. The purpose is to do.
[0012]
It is another object of the present invention to provide an X-ray diagnostic apparatus that can appropriately narrow down an X-ray bundle even when the X-ray detector performs various movements.
[0013]
In addition, the present invention provides an X-ray diagnostic apparatus that can easily obtain a good X-ray fluoroscopic image and enable accurate diagnosis even when the X-ray detector performs various movements during imaging. It is intended to provide.
[0014]
In order to realize the X-ray diagnostic apparatus, the present invention has the following features.
[0015]
The invention according to claim 1 is an X-ray generation unit that exposes an X-ray beam to a subject, an X-ray aperture unit that shapes the exposed X-ray beam, and the X-ray aperture unit Aperture control means for performing control relating to the X-ray aperture operation, X-ray detection means for detecting the X-ray beam transmitted through the subject, and rotation control means for rotating the X-ray detection means. an X-ray diagnostic apparatus, the rotation control means, an axis orthogonal to the X-ray beam center is rotated moving the X-ray detecting means as a rotational axis, the diaphragm control means, wherein the X after the rotational movement X-ray control of the X-ray diaphragm of the X-ray diaphragm is performed in correspondence with the rotational movement of the X-ray detector while maintaining the orientation of the X-ray generator with respect to the radiation detector. It is a diagnostic device.
[0016]
According to such a configuration, since the X-ray detection means can be rotated, the X-ray detection means can be brought into close contact with the subject to obtain a better X-ray fluoroscopic image. As a result, accurate diagnosis can be made possible. The X-ray aperture means is controlled in accordance with the rotational movement of the X-ray detection means. Therefore, even when the X-ray detection means moves, the X-ray flux can be appropriately narrowed down and excessive exposure can be prevented. Further, since the X-ray detection means can be rotated about an axis orthogonal to the center of the X-ray beam as a rotation axis, the X-ray detection means is also brought into close contact with the subject so that better X-ray fluoroscopy is possible. Images can be acquired.
[0021]
According to a second aspect of the present invention, in the X-ray diagnostic apparatus, the aperture control unit synchronizes with the rotational movement of the X-ray detection unit and uses the axis orthogonal to the X-ray beam center as a rotation axis. The diaphragm means is rotationally moved.
[0022]
According to such a configuration, the X-ray diaphragm means rotates about the axis orthogonal to the X-ray beam center as a rotation axis in synchronization with the rotational movement of the X-ray detection means. Therefore, the X-ray flux can be appropriately narrowed down and excessive exposure can be prevented.
[0023]
According to a third aspect of the present invention, in the X-ray diagnostic apparatus, the diaphragm control means narrows down the X-rays emitted from the X-ray generation means to a predetermined image receiving size by the X-ray diaphragm means, and then The X-ray diaphragm means is rotationally moved about an axis orthogonal to the center of the line beam as a rotation axis.
[0024]
According to such a configuration, the diaphragm control means narrows the X-rays emitted from the X-ray generation means to a predetermined image receiving size by the X-ray diaphragm means, and then sets the axis orthogonal to the X-ray beam center as the rotation axis. The X-ray aperture means is controlled to rotate. Therefore, the X-ray flux can be appropriately narrowed down and excessive exposure can be prevented.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of an X-ray diagnostic apparatus according to the present invention will be described in detail with reference to the drawings.
[0026]
FIG. 1 is a diagram showing the appearance of an X-ray diagnostic apparatus 10 according to the present invention.
[0027]
The X-ray diagnostic apparatus 10 includes an X-ray generator 12, an X-ray detector 14, a C arm 16, a high voltage generator 18, a high voltage generator I / F 20, an aperture I / F 22, a detector I / F, and a C arm. An I / F 26, a CPU 28, a video signal conversion unit 32, a console 30, and a TV monitor 34 are provided.
[0028]
The high voltage generator 11 is a device that supplies a high voltage to the X-ray generator 12, and includes a high voltage transformer, a filament heating converter, a rectifier, a high voltage switch, and the like.
[0029]
The X-ray generation unit 12 includes an X-ray tube 121 that emits X-rays to a subject, and an X-ray diaphragm device 123 that collimates the X-rays emitted from the X-ray tube 121. . The X-ray tube 121 is a vacuum tube that generates X-rays, and generates X-rays by accelerating electrons by the high voltage generated by the high-voltage generator 11 and colliding with a target. The X-ray diaphragm 123 is a diaphragm that is provided between the X-ray tube 121 and the subject and narrows the X-ray beam exposed from the X-ray focal point of the X-ray tube to a desired image receiving size. The reason for narrowing down X-rays is to prevent excessive exposure of the subject or to make the displayed image easier to see during diagnosis by the X-ray diagnostic apparatus.
[0030]
Further, the X-ray diaphragm device 123 has a drive mechanism to be described later, and is capable of tilting movement Q and rotation movement R that are driven and controlled in conjunction with the X-ray detector 14. This feature will be described in detail later.
[0031]
The X-ray detector 14 is an X-ray flat detector having a relatively small thickness and a flat detection surface. This X-ray flat panel detector generates X-rays by applying X-rays that have passed through the subject to the photoelectric film, accumulates them in a semiconductor switch, and reads them as electrical signals to detect X-ray signals. It is.
[0032]
Further, the X-ray detector 14 has a drive mechanism, which will be described later, similar to the X-ray diaphragm device, and is capable of tilting movement Q and rotation movement R. This point will also be described in detail later.
[0033]
Note that the X-ray aperture device 123 and the X-ray detection device 14 have movement detectors such as a potentiometer and an encoder in each rotation mechanism section for the tilt rotation movement Q and the rotation movement R. The movement amounts (positions) of the X-ray diaphragm device 123 and the X-ray detector 14 changed by various movements are grasped by the sensor 122 and the sensor 140, respectively.
[0034]
The X-ray generator 12 and the X-ray detector 14 are disposed opposite to both ends of the C-arm 16 and fixedly held (see FIG. 12). The C arm 16 is slidably held by a holder (not shown).
[0035]
The high voltage generator I / F 20 is an interface that transfers a control signal from the CPU 28 for generating X-rays to the high voltage generator 11.
[0036]
The X-ray diaphragm I / F 22 converts a control signal related to the diaphragm operation / movement operation from the CPU 28 into a predetermined signal sequence, and transmits the transmission to the X-ray diaphragm device 123.
[0037]
Further, the X-ray diaphragm I / F 22 transmits position information from the sensor 122 provided in the rotation mechanism unit of the X-ray diaphragm device 123 to the CPU 28.
[0038]
The detector I / F 24 receives the digital fluoroscopic image data digitally converted by the X-ray detector 14 and transfers it to the CPU 28, an image memory (not shown), or the like.
[0039]
The detector I / F 24 converts a control signal related to the detection operation / movement operation from the CPU 28 into a predetermined signal sequence, and transmits the transmission to the X-ray diaphragm device 123.
[0040]
Further, the detector I / F 22 transmits position information from the sensor 140 provided in the rotation mechanism unit of the X-ray detector 14 to the CPU 28.
[0041]
The CPU 28 is a central processing unit that performs control related to collection of X-ray fluoroscopic image data and control related to image processing of the collected image data. Further, the CPU 28 performs control related to the movement of the X-ray detector 14 and the X-ray diaphragm device 123 by the tilt rotation movement Q and the rotation movement R based on the position information input from the sensors 122 and 140.
[0042]
The console 30 is an input device including a keyboard, various switches, a mouse, and the like.
[0043]
The video signal conversion unit 32 converts the signal sequence of the input X-ray fluoroscopic image data into a raster signal sequence in a video format.
[0044]
The TV monitor 34 displays the reconstructed fluoroscopic image data generated by the video signal conversion unit.
[0045]
Next, the movement operation (vertical movement P, tilt rotation movement Q and rotation movement R) between the X-ray diaphragm device 123 and the X-ray detector 14 will be described using the X-ray detector 14 as an example.
[0046]
FIG. 2 is a side view of the X-ray diagnostic apparatus 10 as seen from the direction in which the C-arm 16 is in the forward C direction.
[0047]
The X-ray detector 14 is held at one end of the C arm 16 so as to be capable of vertical movement P, tilt rotation Q, and optical axis rotation R facing the X-ray generation unit 12 held at the other end of the C arm 16. Has been.
[0048]
The vertical movement P is a movement in a direction approaching the X-ray generation unit 12 and a direction moving away from the X-ray generation unit 12. The tilt rotation Q is a rotational movement that changes the angle of the detection surface with respect to the X-rays emitted from the X-ray generator 10. The optical axis rotation R is rotation about the optical axis of the X-rays emitted from the X-ray generation unit 120.
[0049]
The tilt rotation Q and the optical axis rotation R, which are the features of the X-ray diagnostic apparatus 10 according to the present invention, are realized by each rotation mechanism described below. Hereinafter, the X-ray diaphragm device 123 will be described as an example.
[0050]
FIG. 3 is a view for explaining the tilt rotation mechanism 124 of the X-ray diaphragm device 123.
[0051]
In FIG. 3, the diaphragm blade with the shaft 125 fixed (hereinafter, the fixed diaphragm blade is referred to as “unit U”) so that the rotation axis of the tilt rotation and the X-ray beam center are orthogonal to each other. It is attached. The tilt rotation movement Q can be realized by rotating the shaft 125 by a tilt rotation motor 127. In addition, when deceleration is required in consideration of torque, rotational speed, etc., a belt & pulley may be added to the power transmission unit.
[0052]
4A and 4B are diagrams for explaining the optical axis rotation mechanism 126 of the X-ray diaphragm device 123. FIG.
[0053]
As shown in FIG. 4A, the main axis rotation mechanism 124 and the aperture blade unit U are provided with an optical axis rotation mechanism 126 that realizes rotation about the X-ray beam center, that is, an axial rotation movement R. . The optical axis rotating mechanism 126 is configured to mesh a hollow gear 128 further provided in the tilt rotating mechanism 124 with a gear 130 of the motor 129 and rotate by the motor 129. FIG. 4B shows a cross-sectional view in the GG direction. According to such a configuration, tilting rotation in any direction is possible.
[0054]
The tilt rotation mechanism has been described above using the X-ray diaphragm device 123 as an example, but both the tilt rotation Q and the optical axis rotation R of the X-ray detector can be realized by the same mechanism.
[0055]
According to the X-ray detector 14 having the above-described configuration, such a tilt rotation Q or various rotations (vertical movement P, tilt rotation Q, optical axis rotation R) can be performed by a predetermined operation from the console during fluoroscopic imaging. ) By combining the movement, the detector 12 can be more closely attached to the subject. As a result, it is possible to obtain a good image with little influence of the penumbra of the X-ray tube.
[0056]
Further, the X-ray diagnostic apparatus 10 according to the present invention is configured such that not only the X-ray detector 14 but also the X-ray diaphragm 123 can be rotated in various ways. The reason is as follows.
[0057]
In general, when the X-ray detector 14 is moved, the SID (Source Image Distance: distance between the X-ray tube focus and the detector image receiving surface) changes. That is, when the X-ray detector 14 is moved so as to approach the X-ray generator 12, the SID becomes small, and X-rays are irradiated inside the detector image receiving size. In this case, only an image smaller than the desired image receiving size can be obtained, so it is necessary to open the X-ray diaphragm. On the other hand, when the X-ray detector 14 is moved away from the X-ray generator 12, the SID increases, and the X-ray irradiation field increases with respect to the image receiving size. In this case, since the subject is irradiated with useless X-rays that do not contribute to the image, it is necessary to narrow down the X-ray aperture. Conventionally, these X-ray diaphragms are adjusted by moving the diaphragm blades a, b, c, and d of the X-ray diaphragm apparatus shown in FIG. 5 in accordance with changes in the SID.
[0058]
Compared with the conventional X-ray detector, the X-ray detector 14 according to the present invention can further perform a tilting rotation operation Q as shown in FIG. This tilt rotation movement Q of the detector 14 changes the X-ray irradiation area on the detection surface of the detector 14 into a trapezoidal shape, and causes a different SID change for each position of the detection surface (that is, in FIG. At the A end of the X-ray detector 14, the distance is shorter than the original SID, and the aperture of the X-ray aperture device 123 must be widened, while at the B end, the distance becomes longer, and the aperture of the line aperture device 123 is reduced. I have to narrow down more.) Therefore, in order to shape the X-ray irradiation region to an appropriate image receiving size, it is necessary to consider a new X-ray aperture method in order to prevent excessive exposure.
[0059]
For example, when the conventional X-ray diaphragm shown in FIG. 5 is used, a method of moving the diaphragm blades of the X-ray diaphragm apparatus to make the X-ray diaphragm shape trapezoidal is conceivable. That is, as shown in FIG. 5, the operation of the diaphragm blades in this case moves the blade a by a distance La in the arrow direction and moves the blade b by a distance Lb in the arrow direction. At this time, La ≠ Lb. Further, the blades c and d are rotated by θc and θd, respectively, and moved as necessary by Lc and Ld. In this way, adjustment is performed so that the diaphragm is widened for the area where the SID is shortened as a result of tilt rotation, and the diaphragm is narrowed for the area where the SID is long. The aperture adjustment accompanying this SID change is usually automatically controlled in conjunction with the SID change.
[0060]
However, such a method is not practical because not only the mechanism becomes complicated but also the control becomes complicated.
[0061]
In the X-ray diagnostic apparatus according to the present invention, when the X-ray detector 14 rotates by θ as the rotation, the X-ray diaphragm also rotates by θ corresponding to the detector 14 to solve the above problem. Yes. The operation and effect of the X-ray diaphragm device 123 will be described below.
[0062]
FIG. 7 is a diagram for explaining the tilt rotation movement Q of the X-ray diaphragm device 123 executed in conjunction with the tilt rotation movement Q of the X-ray detector 14.
[0063]
The X-ray diaphragm device 123 performs the same tilting rotation operation Q as that of the X-ray detector as a unit U (see FIG. 3) while the diaphragm blades are fixed during the tilting rotation operation R of the detector 14. As the X-ray detector 14 moves, the CPU 28 drives and controls the X-ray diaphragm device 123 so that the detection surface of the X-ray detector 14 is always parallel to the X-ray diaphragm device.
[0064]
As the drive control for each movement of the X-ray diaphragm 123, a method based on a preset program, a method based on an operator's button operation, etc., and a method based on an operator's manual can be considered. Both controls are executed based on information from a movement detector (not shown).
[0065]
Needless to say, the unit U also includes an automatic control function (a function included in the above-described existing device) that translates the diaphragm blades a, b, c, and d linked by the SID.
[0066]
According to such a configuration, the distance between the detection surface of the X-ray detector 14 and the X-ray diaphragm device 123 can always be kept constant. Therefore, since the X-ray diaphragm 123 maintains the unit U in a state parallel to the detection surface of the X-ray detector 14, the X-ray irradiation area does not form a trapezoid. As a result, excessive exposure can be prevented.
[0067]
By the way, in recent years, an attempt has been made to obtain a tomographic image by collecting images while rotating the C-arm. This imaging method requires a fluoroscopic image with a detection surface that always faces the tomographic plane to be acquired.
[0068]
The X-ray detector image receiving surface 14a (shown by a solid line) of the conventional apparatus always faces the X-ray tube as shown in FIG. 8, but does not always face (parallel) the tomographic plane. Therefore, when this imaging method is executed, the fluoroscopic image is obtained from the fluoroscopic image obtained from the actual detection surface 142 by the virtual detection surface 14b (indicated by a dotted line) that always faces the tomographic plane. There was a need to rebuild. This reconstruction is to perform non-linear transformation that transforms the square image shown in FIG. 9A into a trapezoidal image shown in FIG. 9B. In general, this arithmetic processing is complicated and impractical.
[0069]
On the other hand, according to the X-ray diagnostic apparatus 10 according to the present invention, when performing this imaging, the X-ray detector 14 is rotated so that the fluoroscope is detected through the detection surface always facing the tomographic plane to be acquired. An image can be obtained. Therefore, there is no need to perform nonlinear conversion, and a fluoroscopic image for a tomographic image can be easily obtained.
[0070]
Next, an application example of the optical axis rotation R will be described with reference to FIGS.
[0071]
FIG. 10 is a view of a subject lying on a bed (not shown) as viewed from directly above.
The C arm 16 is held via a holder on an arm rotatably attached to the ceiling or floor (see FIG. 12).
[0072]
In FIG. 10, the monitor image at the C-arm position P1 is the optimum display direction. At this time, it is assumed that the fluoroscopic image of FIG. 11A is displayed on the TV monitor 34. When the C arm 16 is rotated in the E direction from the position P1 to the position P2, the display image is rotated as shown in FIG.
[0073]
Therefore, according to the X-ray diagnostic apparatus 10 according to the present invention, the original optimum display corrected from FIG. 11B to FIG. 11C is obtained by rotating the optical axis R in the F direction. A directional image can be obtained. That is, the image direction can always be displayed in a constant direction by controlling the X-ray detector 14 to rotate in the same direction opposite to the C arm 16 (F direction) in conjunction with the rotation of the C arm 16 in the E direction. . At this time, the X-ray diaphragm 123 can also be rotated at the same angle in the same direction in conjunction with the rotation of the X-ray detector 14, thereby preventing unnecessary exposure.
[0074]
As described above, since the X-ray detector 14 and the X-ray diaphragm device 123 can rotate the optical axis R, the observer can continuously observe the image in the optimum display direction even when the C-arm 16 rotates. it can.
[0075]
Therefore, according to the X-ray diagnostic apparatus having the above-described configuration, the X-ray detector can be moved in any way. Then, no matter how the X-ray detector is moved, the X-ray flux can be narrowed down to a shape that matches the image receiving size, and unnecessary exposure to the subject can be eliminated. Furthermore, during tomography, the X-ray detector can be rotationally controlled so that the X-ray detector image plane is always parallel to the tomography plane, and a tomogram can be easily obtained. .
[0076]
As a result, it is possible to rotate the X-ray detection unit so that the X-ray detection unit is truly brought into close contact with the subject and perform fluoroscopic imaging, and a good image can be obtained. Furthermore, it is possible to accurately observe (diagnose) the monitor display image.
[0077]
As mentioned above, although this invention was demonstrated based on embodiment, it is not limited to the said embodiment, A various deformation | transformation is possible in the range which does not change the summary.
[0078]
【The invention's effect】
As described above, according to the X-ray diagnostic apparatus of the present invention, a better X-ray fluoroscopic image can be acquired by bringing the X-ray detector into close contact with the subject. Further, even when the X-ray detector performs various movements during imaging, the X-ray flux can be appropriately narrowed down and excessive exposure can be prevented. Furthermore, a good X-ray fluoroscopic image can be easily acquired by rotating the X-ray detector during imaging. As a result, accurate diagnosis can be made possible.
[Brief description of the drawings]
FIG. 1 is a diagram showing an appearance of an X-ray diagnostic apparatus 10 according to the present invention.
FIG. 2 is a diagram for explaining a movement operation (vertical movement P, tilt rotation movement Q and rotation movement R) of the X-ray diaphragm device and the X-ray detector;
FIG. 3 is a view for explaining a tilt rotation mechanism of the X-ray diaphragm device;
FIGS. 4A and 4B are views for explaining an optical axis rotation mechanism of the X-ray diaphragm device. FIG.
FIG. 5 is a diagram for explaining the diaphragm operation of each diaphragm blade included in the conventional X-ray diaphragm apparatus.
FIG. 6 is a view for explaining tilting movement of the X-ray detector.
FIG. 7 is a diagram for explaining the tilt rotation movement Q of the X-ray diaphragm device executed in conjunction with the tilt rotation movement Q of the X-ray detector;
FIG. 8 is a diagram for explaining an imaging method for obtaining a tomographic image by a conventional X-ray diagnostic apparatus;
FIG. 9 is a diagram for explaining nonlinear transformation executed in an imaging method for obtaining a tomographic image;
FIG. 10 is a top view of the X-ray diagnostic apparatus.
FIG. 11 shows a monitor image corrected by the rotational movement of the X-ray detector.
FIG. 12 is a diagram showing an external appearance of a conventional cardiovascular X-ray diagnostic apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... X-ray diagnostic apparatus 11 ... High voltage generator 12 ... X-ray generator 14 ... X-ray detector 16 ... C arm 20 ... High voltage generator I / F
22: Aperture I / F
24. Detector I / F
26 ... C-arm I / F
28 ... CPU
DESCRIPTION OF SYMBOLS 30 ... Console 32 ... Video signal conversion part 34 ... TV monitor 121 ... X-ray tube 122 ... Sensor 123 ... X-ray aperture device 124 ... X-ray aperture mechanism 125 ... Shaft 127 ... Motor 128, 130 ... Gear 131 ... Bearing U …unit

Claims (4)

X-ray generating means for exposing the subject to an X-ray beam;
X-ray diaphragm means for shaping the exposed X-ray beam;
Aperture control means for controlling the X-ray aperture operation of the X-ray aperture means;
X-ray detection means for detecting an X-ray beam transmitted through the subject;
Rotation control means for rotating the X-ray detection means;
An X-ray diagnostic apparatus comprising:
The rotation control means rotates the X-ray detection means about an axis orthogonal to the X-ray beam center as a rotation axis,
The aperture control means maintains the orientation of the X-ray generation means with respect to the X-ray detection means after the rotational movement, and corresponds to the rotational movement of the X-ray detection means to correspond to the X-ray of the X-ray diaphragm means Control the aperture,
X-ray diagnostic apparatus characterized by the above.   2. The aperture control means rotates the X-ray aperture means about an axis orthogonal to the X-ray beam center in synchronization with the rotational movement of the X-ray detection means. X-ray diagnostic equipment.   The diaphragm control means narrows down the X-rays emitted from the X-ray generation means to a predetermined image receiving size by the X-ray diaphragm means, and then uses the axis orthogonal to the X-ray beam center as a rotation axis. 2. An X-ray diagnostic apparatus according to claim 1, wherein said means is rotated.   The X-ray diagnostic apparatus according to any one of claims 1 to 3, wherein the rotation control unit enables the X-ray detection unit to rotate about the X-ray beam center as a rotation axis.

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