JPH0219802Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a multi-purpose X-ray fluoroscopic imaging device that can perform enlarged stereoscopic imaging, special imaging such as the TOWNE method, simple tomography, and oblique imaging in conjunction with frontal close-up or enlarged imaging. The present invention relates to an X-ray fluoroscopic imaging device equipped with a radiographic imaging function.

Conventionally, the various X-ray imaging systems described above have been carried out individually and separately, and in rare cases, systems have been provided that combine only a few of these imaging functions.

For example, in order to image the converging blood vessels in the brain and make a diagnosis, we use an enlarged stereoscopic radiograph using a contrast agent, and a stereoscopic X-ray radiograph consisting of a stereo bifocal X-ray tube and a film exchange holder. Single-function X-ray fluoroscopy systems are already in use. However, in this conventional device, the three-dimensional
A monitor X that monitors the moving position of the contrast medium injected into the subject's subject in the same plane as the radiography system.
Because a fluoroscopy system is not installed, during angiography, a catheter is inserted into the patient's blood vessel while being observed using the X-ray fluoroscopy system, and the catheter remains inserted until it reaches the vicinity of the examination site. In order to bring the examination area (subject) to the imaging position, the examinee must be moved along with the tabletop considerably, which puts the examinee at risk during this movement, and at the same time puts nurses and other operators at risk. However, there is a problem in that it imposes a burden on the catheter to prevent it from moving within the blood vessel. Contrast imaging of the cerebrovascular system and other areas must be performed carefully, taking into account the risk of damage to the blood circulation system, especially the liver, due to the contrast agent. It is desirable to obtain diagnostic information, and for this purpose, there is a need for an apparatus that can perform enlarged stereoscopic imaging of, for example, a frontal image and a side view of a subject from two directions in a short time.

This invention was developed in view of the current situation described above, for example, to address the problems with the conventional magnified stereoscopic X-ray fluoroscopic imaging apparatus described above, and in particular, to solve the problem of the subject's blood vessels during angiography in stereoscopic X-ray imaging combined with angiography. Examination area (subject) with catheter inserted
It is possible to minimize the movement of the top plate to bring the patient to the imaging position, to prevent the subject from being exposed to danger during said movement, and to reduce the burden on doctors and nurses. , special imaging functions such as the TOWNE method, as well as an enlarged 3D imaging function that can meet the needs of contrast imaging.
It is an object of the present invention to provide a multifunctional X-ray fluoroscopic imaging device that has the functions of performing simple tomography, oblique imaging, and frontal close-up or enlarged imaging.

Hereinafter, an embodiment of the device according to the invention will be described in detail with reference to the drawings. FIG. 1 is a front view of essential parts of an embodiment of the device according to this invention. In FIG. 1, a rotating frame 12 is rotatably supported on a base 13 via a pair of guide rollers 14, and an octagonal support frame 15 is attached to the rotating frame 12. The body 12 is supported so as to be tilted forward or backward with respect to the vertical plane of rotation. A stereo bifocal X-ray tube 1 is attached to the support frame 15 via a tube holding arm attached to the support frame 15.
1. Single focus X-ray tubes 10 and 16 are installed so as to point toward the center of rotation of the rotating frame 12, respectively. Reference numeral 3 denotes a film holding section, and 3' denotes a film exchange holding section. In this embodiment, a film changer is used which holds the film 2 and automatically changes the film 2 after photographing. The X-ray tubes 10 and 11 are mounted on the support frame 15 so as to close the opposite positions thereof.
17 is an image amplifier amplifier, 18 is a television camera attached to it, and these are X-ray tubes 16
It is attached to the support frame 15 via support arms so as to close the opposing position. In this way, both the X-ray imaging system consisting of the single focus X-ray tube 10 and the film chainer 3 and the stereoscopic X-ray imaging system consisting of the stereo bifocal X-ray tube 11 and the film chainer 3' are operated at They are arranged at a phase angle of 100 degrees, so that they can take relative positions suitable for frontal and side photographing of the subject 5, respectively. An X-ray fluoroscopy system consisting of a camera 18 is disposed at a phase angle of 45° with respect to the stereoscopic X-ray imaging system, and is used as a monitor when contrast imaging is performed using the stereoscopic X-ray imaging system, for example. has been done.

The top plate 4 is supported such that its setting position can be adjusted in the body axis direction of the subject 5 and in the vertical direction within a certain range.

Although not shown in the figure, the rotating frame 12
is rotatably driven by a deceleration motor with a drive brake fixed to the base 13 via a gear transmission system or a chain transmission system, and the support frame 15 is rotated by a deceleration motor with a drive brake fixed to the base 13. It is rotated by a similar motor through a gear transmission system or a chain transmission system, using a support shaft for the rotating frame 12 as a rotation axis, and at a desired inclination angle with respect to the vertical rotation surface of the rotating frame 12. It is made to be tiltable.

In addition, the rotation control of the rotating frame driving motor and the supporting frame tilting motor, and the X-ray tubes 10, 11,
A control device (not shown) that controls X-ray generation of 16
is provided.

Next, the operation of this device will be explained.

This device can perform enlarged stereoscopic imaging from multiple directions, nearly simultaneous enlarged stereoscopic imaging from two directions, special imaging such as the TOWNE method, simple tomography, and oblique imaging.

Representative ones among these will be explained below.

(A) Enlarged stereoscopic imaging: Describes the case where angiography is used in combination to obtain enlarged stereoscopic imaging of a congested group of blood vessels, such as the cerebral vasculature, from two directions, frontal and lateral, at the same time.

When inserting a catheter connected to a contrast agent injection device from, for example, the thigh of the subject 5 to the neck near the examination site (subject), the top plate 4
is moved in the body axis direction, and the catheter is inserted to a predetermined blood vessel position while being monitored by a monitor television via an X-ray fluoroscopy system consisting of an X-ray tube 16, an image amplifier amplifier 17, and a television camera 18. be done. Next, subject 5's subject is placed at the shooting position, that is, stereo 2.
The top plate 4 is moved and positioned in the body axis direction so that it is right next to the focal X-ray tube 11. Care must be taken when moving this catheter with it inserted, but in this device, the X-ray fluoroscopy system for monitoring is connected to the stereo bifocal X-ray tube.
Since the top plate 4 is provided in the same plane as the top plate 1, it is only necessary to move the top plate 4 a little compared to the case of conventional devices, and it is possible to prevent the occurrence of danger to the subject during the movement. , the burden on doctors, nurses, etc. can be reduced.

Now, a contrast medium is injected into the examination area through the catheter, and at the same timing, the upper focal point F of the stereo bifocal X-ray tube 11 is activated, and the film 2 held in the film chainer 3' is The subject 6 is first photographed from the upper left direction, and then the film 2 is replaced with another film by the film changer 3'. The subject is photographed from the lower left on another film 2 at 3'. By performing two shots before and after on separate films in this manner, two images necessary for three-dimensionally observing the side view of the subject can be obtained. After the stereoscopic X-ray imaging system has taken the image, the rotary frame 12 is rotated 90 degrees clockwise and held at that position, and the stereoscopic X-ray imaging system produces a frontal image of the subject 6 through the same process as described above. Two enlarged images necessary for three-dimensional observation can be obtained.

In particular, contrast imaging of the cerebrovascular system must be performed carefully, taking into account the effect of the contrast medium on blood circulation and the risk of damage to the liver. It is desirable to obtain a large amount of diagnostic information, and with this device, one stereoscopic X-ray imaging system can take approximately six images per second, and if necessary, enlarged stereoscopic imaging from two directions can be performed almost simultaneously. It is beneficial to learn.

In addition, the rotary frame body 12 is rotated, and the stereo
By positioning the focal X-ray tube 11 at a desired position around the body axis of the subject 5, enlarged stereoscopic imaging of the subject 5 can be performed from all directions around the body axis. .

(B) Special imaging such as the TOWNE method: In the TOWNE method, which is one of the special imaging methods, the X-ray irradiation center line is placed on the top of the head within a vertical plane that includes the body axis with the subject 5 in a horizontal supine position. This is a method of imaging in which the beam is aimed at the external occipital tubercle at an inclined angle of 25° to 30°. When performing enlarged imaging in this direction, other bones are not overlapped across the entire skull, so it is used for imaging skull fractures and the cerebrovascular system.
A case in which the TOWNE method is applied will be explained.

First, in the state shown in FIG. 1, the tube support frame 15 supported by the rotating frame 12 is tilted around the support shaft toward the top of the subject's head by an angle of inclination of, for example, 27 degrees in a vertical plane that includes the body axis. Tilt and fix.
Next, the point of the X-ray imaging system, for example, the X-ray tube 10, is placed directly above the body axis of the subject 5, and the line connecting this focal point and the center of the film 2, that is, the axis of the X-ray beam, is located directly above the body axis of the subject 5. The position of the top plate 4 may be adjusted so as to pass through the occipital tuberosity, and the image may be taken. Of course, you can also take oblique shots from other angles.

(C) Simple tomography: Adjust the setting position of the top plate 4 so that the cut surface of the subject 5 to be imaged is shown at the center of rotation of the rotating frame 12, turn the drive deceleration motor described above, and rotate the rotating frame 12. For example, clockwise
Rotate 10 degrees and then stop. Next, the drive deceleration motor is rotated in the opposite direction, and the rotating frame 12 is rotated counterclockwise to rotate the X-ray tube 10.
is activated, and it is
X-ray irradiation is started on the subject 5 when the subject 5 comes to a position deviated, for example, by about 5 degrees to the right from a vertical plane that includes the body axis, and the X-ray tube 10 passes through the vertical plane and then moves to the left. The X-ray irradiation is stopped when the X-ray tube 11 reaches a position deviated by about 5 degrees in the direction, and when it reaches a position deviated by about 10 degrees, the motor is stopped and the rotational movement of the X-ray tube 11 is stopped.

Simultaneously with the above-mentioned operation of the X-ray tube 10, the film changer 3 disposed at the opposite position moves to the side opposite to the X-ray tube 10 with respect to the rotation center of the rotating frame 12, and is held there. The subject existing on the cut surface of the subject 5 to be photographed on the film 2 is almost selectively photographed.

By the way, the above-mentioned imaging is performed by an arc movement method in which the X-ray tube 10 and the film chain engine 3 move along an arc.
During the arcuate movement, the film 2 is not held parallel to the cut surface to be photographed.

Therefore, with this device, it is impossible to perform regular tomography in which the X-ray tube's irradiation angle is increased by about 20 degrees on each side, but it is only possible to perform irradiation at an angle of about 5 degrees on each side. In this case, since the deviation of the held state of the film 2 parallel to the cut surface to be imaged during that time is not so large, simple tomography can be performed to the extent that there is no problem in practical use.

Furthermore, with the X-ray tube 10 in the position shown in FIG.
By bringing the subject 5 as close as possible to the film 2 using the top plate 4, a close front image of the subject can be photographed.

FIG. 2 is a front view of main parts of another embodiment of the device according to this invention. In the figure, parts that are different from the apparatus shown in FIG. 1 will be explained. 20 is a tube support arm, which is attached to the support frame 15 with the Z-Z' axis as the rotation axis.
The stereo bifocal X-ray tube 11 and the single focus X-ray tube 10 are attached to the rotary frame 12 through tube holding arms at both ends thereof so as to be able to rotate by 180 degrees. The stereo bifocal X-ray tube 11 and the single focus X-ray tube 10 shown in FIG.

Therefore, in this other device, when it is necessary to take a three-dimensional front image, the tube support arm 20 is rotated 180 degrees around the Z-Z' axis, and the X-ray tube 10 is
The X-ray tube 11 may be located at the position shown in FIG. In other words, in this other device, frontal images and side images are taken sequentially almost simultaneously by selectively changing the position of the stereo bifocal X-ray tube 10 through enlarged stereoscopic imaging using a contrast imaging method. be able to.

Furthermore, the single focus X-ray tube 10 shown in FIG.
As in the case of the embodiment shown in FIG. 1 described above, an enlarged frontal image and a close frontal image of the subject 5 can be respectively photographed.

As is clear from the above explanation, the X-ray fluoroscopic imaging apparatus according to this invention has the following effects.

(i) Since the X-ray imaging system and the X-ray fluoroscopy system are installed on the same plane, examinations can be performed while a catheter is inserted into the patient's blood vessels during contrast imaging of the cerebrovascular system, etc. The distance that the examinee is moved together with the top plate in order to bring the body part to the imaging position is minimized, which prevents the examinee from being exposed to danger during the movement. Being able to reduce the burden on doctors, nurses, etc.

(ii) Since the stereo bifocal X-ray tubes are positioned relative to the subject with a 90° or appropriate angular phase difference, enlarged stereoscopic imaging can be quickly performed at each position;
To be able to perform stereoscopic imaging from two directions almost simultaneously during imaging using a contrast medium, and to obtain a large amount of diagnostic information by one injection of a contrast medium.

(iii) Since a single focus X-ray tube is attached, close front images and enlarged front images can be taken. This makes it possible to perform simple tomography and oblique imaging.Furthermore, the support frame of the X-ray tube is supported by the rotating frame so that it can tilt back and forth with respect to its vertical rotating surface. Because it is mandatory,
Compared to conventional devices of this type, it has been able to achieve a higher degree of multi-functionality in terms of imaging functions, such as the ability to perform special imaging such as the TOWNE method.

[Brief explanation of the drawing]

FIG. 1 is a front view of a main part of an apparatus according to this invention, and FIG. 2 is a front view of a main part of another apparatus according to this invention. 2...Film, 3...Film holding section (film changer), 3'...Film exchange holding section (film changer), 5...Subject, 10...
Single focus X-ray tube, 11... Bifocal X-ray tube for stereo, 12... Rotating frame, 13... Base, 15...
Support frame, 16... Single focus X-ray tube, 17... Image amplifier amplifier, 18... Television camera, 1
0,3...X-ray imaging system, 11,3'...Stereoscopic X-ray imaging system, 16,17,18...X-ray fluoroscopy system, 20
...Tube support arm, F, F'...Two focal points for stereo X
Focus of the ray tube.

Claims (1)

[Claims for Utility Model Registration] 1. A support frame that can be tilted back and forth is supported by a rotary frame body that rotates in a vertical plane, and the support frame has the following (i) ) to (c) are arranged in the relationship of (d) and (e)
Fluoroscopic imaging device. (a) An X-ray imaging system consisting of an X-ray tube that performs X-ray imaging and a film holder. (b) A stereoscopic X-ray imaging system consisting of a stereo bifocal X-ray tube that performs enlarged stereoscopic imaging and a film exchange holder. (c) An X-ray fluoroscopy system consisting of an X-ray tube and an image amplifier amplifier for confirming the moving position of the contrast medium to be injected into the subject. (d) Either one of the X-ray imaging systems (a) and (b) above is located on the tilting axis of the support frame. (e) Each of the systems (a) to (c) above is located at a position where they do not interfere with each other, and the X-ray emission axis of each system is directed toward the center of rotation of the rotating frame. 2 A tube that holds the two X-ray tubes of the X-ray imaging system and the stereoscopic X-ray imaging system against the support frame and is rotatably attached to the support frame by 180° on a support shaft fixed to the support frame with its center oriented. The X-ray fluoroscopic photographing apparatus according to claim 1, wherein the X-ray photographing system is switchable between the two X-ray photographing systems via a support arm.