JPS6354385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a two-directional X-ray fluoroscopic imaging device equipped with a C-shaped arm that simultaneously or separately performs fluoroscopic imaging of X-ray images in two orthogonal directions such as the front and side surfaces or the front and upper surfaces of a subject. It is related to.

For example, it has superior dynamic resolution compared to cardiovascular angiography, which uses X-rays to image the hemodynamics of the thin coronary arteries in the heart wall and the fast-moving large blood vessels of the heart. Continuous imaging with a cine camera is widely used clinically because it is advantageous in this respect and provides high-quality images. However, on the other hand, contrast media cannot be said to be completely harmless, so in order to reduce the number of injections,
For example, various cine biplane devices have been devised and utilized that enable simultaneous two-directional imaging from the front and side, as well as multi-directional imaging without moving the subject as much as possible, regardless of the site where the contrast medium is injected. ing. In principle, this cine biplane device is a system in which a front direction photographing system and a side direction photographing system are separately constructed and these are combined. This device, which has been commonly used in the past, is called a C-arm stand type as a frontal imaging system.
C supported on the floor-mounted (movable) device body
An X-ray tube is installed at one end of the shaped arm, and an image receiving device such as an image tube or cine camera is installed at the other end. The device can be freely rotated up to a certain angle to photograph the region to be photographed from any direction. On the other hand, in the case of lateral imaging systems, it is currently common to use a ceiling-suspended device that is configured separately from the above-mentioned device.
This ceiling-suspended photographic device weighs over 500 kg, and not only requires a strong ceiling structure to support it, but it also requires difficult installation work to make it movable, and requires a high ceiling height. There are problems such as the necessity of Furthermore, in the case of cardiac mitral valve contrast imaging, aortic ostial contrast imaging, etc., the front and side imaging systems can be rotated, for example, 30 degrees counterclockwise around the isocenter (in this case, the center point of the heart). required. However, since this is not possible with the configuration of the conventional apparatus, the patient or the examination table must be rotated around the isocenter. This has the disadvantage that the subject must be moved while a catheter for injecting a contrast medium is inserted into the subject, which is dangerous. Furthermore, a device in which the side photographing system was not suspended from the ceiling was devised in Japanese Patent Application No. 106675-1981.
This device has a C-arm for frontal imaging, which has a rotating support shaft, and a side imaging system. For this reason, in the lateral imaging system, the C-arm for frontal imaging rotates around the subject's body axis and in the sagittal direction, and the C-arm for the lateral imaging system independently takes images around the body axis from any direction. There is a drawback that it cannot be done.

This invention was made in view of the above-mentioned current situation, and most of the conventional two-directional X-ray fluoroscopic imaging devices have a side imaging system suspended from the ceiling, and some have a C-shaped arm for front imaging and a lateral imaging system. This solves the drawbacks and problems caused by devices that support C-arms. In other words, by using a new configuration in which two sets of C-shaped arms, one for frontal and one for side imaging, are rotatably supported on a single column, each imaging system can be freely rotated or tilted, thereby allowing the patient to be placed on the examination table. Simultaneous imaging in multiple directions can be performed without moving the examiner at all. This device frequently performs imaging not only in two directions but also in one direction, in which case the other C-arm imaging system can be easily evacuated at any time. In addition, it is easy to quickly separate the two sets of imaging systems from around the patient in the event of an emergency situation for the patient.
This device provides excellent accessibility for the surgeon to the patient and facilitates treatment before and after imaging. Furthermore, when the device base is rotatably supported on the floor with the patient's isocenter as the center of rotation, contrast imaging of the special parts of the heart mentioned above can be performed without moving the patient. The aim is to provide a safe device that poses no danger to anyone. .

Embodiments of the present invention will be described below with reference to the drawings. 1, 2, and 3 are diagrams showing the configuration of a C-arm type two-directional X-ray fluoroscopic imaging device according to the present invention, in which FIG. 1 is a plan view seen from above, and FIG. Figure 3 is a left side view on the opposite side to the above;
Both diagrams are from two-direction fluoroscopic imaging positions. Figure 4 shows a C-shaped arm 10 for frontal imaging and a C-shaped arm 18 for side imaging.
FIG. Reference numeral 4 denotes a device base, which is supported by a base support shaft 6 installed on the floor 5 and rotates in the direction of the arrow a shown in FIG.
Freely rotates θ (for example, ±90°). The position O' ₁ of the rotational support shaft 6 is the rotation center of the two sets of C-arm imaging systems. In this case, the optical axes X _F and X of the X-ray beams of the respective imaging systems 2 and 3 shown in FIG. _S intersection point O ₁
is located on the vertical axis of the A frontal photographing system (hereinafter referred to as frontal system) with the device support 7 installed on the _O2 axis on the opposite side of the support shaft 6 position of the base 4 as the pivot.
The support column 8 is rotatably supported and rotates in the direction of arrow b shown in Fig. 1, allowing the imaging system 2 to be moved to the retracted position shown in Fig. 5 (a position rotated by 90 degrees from Fig. 1). . A front system C-arm support arm 9 is rotatably supported in the horizontal direction on the front system column 8. This direction of rotation is controlled by the rotation of the support arm 9 in the direction of arrow C shown in FIG.
This is the direction in which the frontal system X-ray optical axis X _F formed by the image receiving device 1 and its image receiving device 12 is tilted at an angle of (±β). This is a rotation of the subject body axis B-B' in the Z-axis direction, and is generally referred to as the sagittal or sagittal direction, for example ±
It is a rotation of 45 degrees. Returning to FIG. 2, the front C-shaped arm 10 is equipped with the X-ray tube device 11 and the variable aperture mechanism 13 at one end so as to be movable in the direction of the arrow d, and at the other end an image tube 12 and a cine camera (not shown). is attached to form an image receiving device. Furthermore, this arm 10 is moved by the arrow e by a C-shaped arm rotation drive mechanism 14 built into the arc-shaped portion at the tip of the support arm 9.
It is rotated around the isocenter O ₁ in the direction. This is shown in FIG. 4, where the X-ray optical axis X _F is rotated by an angle of (±α _F ), which is usually an arbitrary rotation up to ±90°. A side support 15 is provided on the upper part of the support 8 shown in FIG. ₂ and is rotatable in the direction of the arrow f shown in FIG. This pillar 15
A side C-shaped arm support arm 16 is fixed to the tip 15T of the arm that protrudes parallel to the body axis Z direction of the subject 1. The arcuate portion 17 at the tip of the support arm 16 has a built-in C-arm rotation drive mechanism similar to the one described above, and rotates the side C-arm 18 about the isocenter O ₁ in the direction of the arrow g shown in FIG. It is rotatably supported. This is shown in Figure 4, where the rotation of the (±α _S ) angle of the side X-ray optical axis X _S is also ±
It can be rotated arbitrarily up to 90°. Side C type arm 1
Similar to the planar system, an X-ray tube device 19 and a variable diaphragm mechanism 20 are attached to one end of the 8 to be movable in the direction of the arrow h shown in FIG. 3, and an image tube 21 and a cine camera (not shown) are attached to the other end. are doing. As mentioned above, FIG. 5 is a diagram showing the evacuation position of two sets of C-arm imaging systems 2 and 3 before and after imaging. Two or three C-arm imaging systems are retracted in parallel to the Z-axis in the body axis direction (not shown), and both sides of the top plate 23 are completely opened. The above is the explanation of the first embodiment of this invention.

Next, a second embodiment of the apparatus will be explained with reference to FIGS. 6 and 7. FIG. 6 is a plan view seen from above, and FIG. 7 is a side view. Components with the same symbols as those in FIGS. 1 to 5 will not be explained. This embodiment device has a lateral C-shaped arm 18 on the vertical axis O' ₁ -O'' ₁ of the isocenter O ₁ , and is characterized by a small footprint.Other configurations and effects will be discussed in the following. This is the same as the first embodiment.The center of rotation of the column 15 of the side photographing system 3 is placed at _O2 , and the center of rotation of the column 8 of the front system 2 is placed at _O3 .

The above is a description of two embodiment devices of the present invention, but the present invention is not limited to the illustrations and description. For example, even if the base 4 is fixed on the floor, it is within the scope of the present invention. In that case, side shooting system 3
For example, the structure may be such that only the center of rotation of the device is placed on the ceiling, and its own weight is not suspended from the ceiling. Further, the side C-shaped arm may be rotated relative to its support if necessary.

Since this invention is configured as described above,
This eliminates the drawbacks and problems of conventional two-way X-ray fluoroscopic imaging devices. In other words, since the side imaging system does not require hanging from the ceiling, ceiling construction is simple, the device occupies a small area, and can be used even in small rooms.
One or two sets of C-arm imaging can be easily and quickly completely evacuated from around the examination table, making it easier for the operator to carry out the examination process. Furthermore, if the device base is configured to rotate freely around the isocenter, contrast imaging of the mitral valve orifice of the heart, aortic valve orifice, etc., can be performed without moving the examination table at all, which poses a risk to the patient. This provides a convenient device that is completely free from the risk of

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the device of the present invention, and FIG.
The figure is a right side view seen from the subject's head, Figure 3 is a left side view seen from the opposite direction, Figure 4 is a partial perspective view showing the rotation direction of the front and side C-arm imaging system, and Figure 5 is a partial perspective view showing the rotation direction of the C-arm imaging system. The figure shows the two sets of C-arm photographing systems in the above-mentioned apparatus in the retracted position, FIG. 6 is a plan view of another embodiment of the apparatus of the present invention, and FIG. 7 is a left side view thereof. 1... Subject, 2... C-shaped arm front perspective imaging system, 3... C-shaped arm side perspective imaging system, 4... Equipment base, 5... Installation floor surface, 6... Base support shaft, 7 …
...Equipment support, 9...Front photography system support arm, 10...
Frontal imaging system C-shaped arm, 11, 19... Side photographing system C type arm rotation drive mechanism, 18...Side photographing system C type arm, Z axis...
Subject's body axis B-B', O ₁ ... Center point of the subject's imaging region (intersection of X-ray beam optical axes X _F and X _S ), X _F ...
X-ray beam optical axis of the frontal imaging system, X _S ...X-ray beam optical axis of the side imaging system, O ₁ - O' ... Vertical axis passing through O ₁ .

Claims (1)

[Scope of Claims] 1. In an apparatus for fluoroscopically photographing X-ray information transmitted through the subject 1 from two directions, the front and the side, with the subject 1 lying horizontally, the subject 1
Two support arms 9 and 16 are provided on the side of the device and protrude horizontally with one device support 7 provided on the device base 4 as a pivot in different positions up and down, and each freely rotate around the support support 7. , an X-ray tube device 11 and an X-ray image receiving device 12 are mounted on both ends of a C-shaped arm 10 of one of the support arms 9, facing each other, and the object 1 is
The front photographing system 2 for photographing the front of the subject 1 is connected to the subject 1 using the same C-shaped arm 18 of the other support arm 16.
Side photographing system 3 that photographs the side of
A pair of C-shaped arm fluoroscopic photographing mechanisms installed so that the optical axes XF and XS of the line beams are orthogonal to each other, and the frontal photographing system C-arm 10 are arranged around the subject's body axis Z-axis and the sagittal direction Z-axis perpendicular thereto. direction, and the side photographing system C-arm 18 at least along the body axis Z of the subject.
A C-shaped arm rotation drive mechanism 1 that freely rotates the tips of the support arms 9 and 16 around an axis.
4, 17. 2. The device base 4, which is provided with the device support 7 at one end, is configured so that it can be rotated horizontally on the installation floor 5 about the vertical axis O ₁ −O′ ₁ passing through the center point O ₁ of the object to be imaged. A C-arm type two-way X-ray fluoroscopic imaging device according to claim 1, which is pivotally supported on a base support shaft 6.