JPH0525601Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field This invention is a two-way fluoroscopic imaging device configured to take fluoroscopic images of a supine subject from different directions using two sets of X-ray imaging devices. Regarding.

B. Prior Art Conventionally, in this type of apparatus, as shown in FIGS. 1 and 2, a patient is placed on a base 2 installed on the floor on the head side of a subject M who is lying on a bed 1. A C-shaped arm 3 inserted from the head side of the examiner M is attached so as to be adjustable in angle around the subject's body axis, and an X-ray tube device 4 and an image receiving device 5 are provided at both ends of this C-shaped arm 3. The constructed frontal imaging system A and the movable table 7 that can be moved in the direction of the subject's body axis along the ceiling rail 6,
A C-shaped arm 8 inserted from the circumferential side of the subject M is attached so that its angle can be adjusted around the body axis of the subject M.
An X-ray tube device 9 and an image receiving device 10 are installed at both ends of the shaped arm 8.
There is a side photographing system B which is configured with the following.

In the above-mentioned two-way fluoroscopic imaging system, there is a state in which only the front imaging system A is used (hereinafter referred to as a single plane) and a state in which both front and side imaging systems A and B are used simultaneously (hereinafter referred to as a biplane). ), and in the case of a single plane, the side imaging system B is moved back to the park position P set on the back side of the base 2, as shown by the imaginary line in Figure 1, and the patient is Leave a large space around M.

Using the two-way fluoroscopic imaging device with the above configuration, for example, the front and side imaging systems A and B are set at the angles shown in Fig. 6a to perform biplane imaging during the treatment. If it becomes necessary to use a single plane in the middle of the process, if you move the side camera system B toward the park position P while maintaining the same angle, a part of the side camera system B will become attached to the C-shaped arm 3 of the front camera system A. There is a risk of collision with the base 2.

Therefore, in the conventional method, based on the mode switching operation from biplane to single plane, the frontal imaging system A is temporarily placed in a neutral position with the imaging axis vertical, as shown in FIG. 6b, and the side imaging system B is After returning the camera to a neutral position where the imaging axis is horizontal, an operation sequence was performed in which the side imaging system B was moved to the park position P (Figure 7a-
(see d).

C. Problem to be solved by the invention However, according to the above-mentioned operation sequence, in order to move the side-viewing system B to the park position P, the front-viewing system A has to be in the neutral position, so it is necessary to switch to a single plane. After completion, it becomes necessary to reset the frontal imaging system A to the previous imaging angle, which poses the problem of not only taking time to switch modes but also increasing X-ray exposure for the practitioner and patient. Ta.

Further, when switching from a single plane to a biplane, the reverse operation is required, and the switching takes a long time.

This invention was made in view of the above circumstances, and provides a two-way fluoroscopic imaging device that can shorten the time required to switch the imaging mode from biplane to single plane or vice versa. The purpose is to

D. Means for Solving the Problems This invention has the following configuration to achieve the above object.

That is, the two-way fluoroscopic imaging device according to this invention,
A C-shaped arm inserted from the head side of the patient is attached to a base set on the floor on the head side of the patient lying supine on the bed so that the angle can be adjusted around the patient's body axis. A front imaging system consisting of an X-ray tube device and an image receiving device at both ends of this C-shaped arm, and a movable table movable along the ceiling rail in the direction of the patient's body axis are installed around the patient. A two-way imaging system consisting of a C-shaped arm inserted from the side that is adjustable in angle around the patient's body axis, and a side imaging system consisting of an X-ray tube device and an image receiving device at both ends of this C-shaped arm. In the fluoroscopic imaging device, a park position for the side imaging system is set on the back side of the base, and an auxiliary park position is set between the base and the imaging device section for the front imaging system. means for detecting an angle around the body axis of the subject; means for detecting the angle around the subject's body axis of the lateral imaging system; means for detecting the position of the lateral imaging system in the direction of the subject's body axis; When moving the system from the shooting position to the park position, first rotate the side shooting system at the shooting position to an angle that intersects the front shooting system at an approximately right angle, and then move the side shooting system to the auxiliary park position in this state. After moving it to this auxiliary park position and setting the side shooting system to approximately horizontal horizontal neutral,
The side photographing system is moved beyond the base to the park position, and on the other hand, when moving the side photographing system from the park position to the photographing position, it is provided with side photographing system control means for operating in the reverse order.

E Effect According to this invention, when switching from biplane to single plane or vice versa,
The angle of only the side photographing system is automatically changed without changing the angle of the front photographing system at all, so that the side photographing system passes through the front photographing system without colliding with the front or rear.

F. Example Hereinafter, an example of this invention will be described based on the drawings.

The mechanical configuration of the two-way fluoroscopic imaging device according to this embodiment is as described above with reference to FIGS. 1 and 2, so detailed description thereof will be omitted here.

In this embodiment, as shown in FIG. 2, an auxiliary park position P' is set near the front side of the base 2 of the frontal imaging system A to temporarily stop the side imaging system B so as not to interfere with the imaging device. . The park position P and the auxiliary park position P' are set by attaching a limit switch or the like to the ceiling rail 6.

Further, the front photographing system A is equipped with a potentiometer 11 that detects the angle of the C-shaped arm 3, and the side photographing system B is equipped with a potentiometer 12 that detects the angle of the C-shaped arm 8. As shown in the control device block diagram of FIG.
and the side photographing system control section 14, respectively.

Next, the angle adjustment operation of the side photographing system B performed using this control device will be explained based on FIGS. 3 to 5.

FIG. 3a shows a biplane photographing mode, in which the front photographing system A and the side photographing system B are each set at a required angle from the reference neutral position.

To change the mode from this state to single plane, turn on the ``park switch'' installed on a control panel (not shown) installed separately on the floor. When the "Park Switch" is turned on, the switch _S1 shown in Figure 4 is activated in conjunction with this.
becomes ON state, and potentiometer 1
The angle θ ₁ of the frontal photographing system A detected in step 1 is read into the side photographing system 14 via the frontal photographing system control section 13 and input into the arithmetic circuit 15 .

The arithmetic circuit 15 provides a target angle setting signal obtained by adding 90° to the detected angle θ ₁ as one input of the servo amplifier 16 via the switch S ₂ . Further, the angle θ ₂ of the side photographing system B detected by the potentiometer 12 is input to the other side of the servo amplifier 16 and given. Based on the fact that the servo amplifier 16 outputs the difference between the two inputs, the C-arm drive circuit 17 operates so that the output of the servo amplifier 16 is zero, that is, the side photographing system B intersects the front photographing system A at right angles. The drive mechanism 18 of the C-shaped arm 8 is driven. As a result, the side photographing system B is in a state as shown in FIG. 3b. In this case, the image receiving device 10 is also automatically retreated to the position farthest from the subject M.

When the side photographing system B reaches a perpendicular attitude with respect to the front photographing system A, the drive mechanism of the movable base 7 is activated and the side photographing system B begins to travel toward the park position P.
In this case, the side photographing system B passes through the C-shaped arm 3 and the like of the front photographing system A without contacting them.

When the side photographing system B reaches the auxiliary park position P', the limit switch provided at this position is activated, and the movable base 7 is temporarily stopped, and the switch _S2 is automatically moved to the setting device 19 side. Instead of the target angle signal from the calculation circuit 15, a signal θ ₀ corresponding to the angle of the reference neutral position n is input from the setting circuit 19 to the servo amplifier 16. As a result, the difference between the signal θ ₀ and the angle θ ₂ of the side photographing system B is output from the servo amplifier 16, so that the side photographing system B rotates to the neutral position and stops as shown in FIG. 3c. do.

When the C-shaped arm 8 of the side photographing system B stops in the neutral position, the movable base 7 starts traveling again, and the side photographing system B passes through the base 2 and heads toward the park position P.
When reaching the park position P is detected by the limit switch installed at that position, traveling is stopped, and the completion of switching to the single plane is displayed on a lamp L etc. installed on the operation unit. After confirming this, turn off the "Park Switch".

Furthermore, switching from single plane to biplane is performed by pressing a "biplane switch" provided on the operation panel in the reverse order of the control described above.

Note that the control system of the above-described embodiment may be realized by a so-called hardware configuration using individual parts.
Alternatively, it may be configured in a so-called software manner using a microcomputer.

G. Effects of the invention As is clear from the above explanation, according to this invention, when switching from biplane to single plane or vice versa, there is no need to change the angle of the front shooting system at all, so it is not necessary to change the angle of the front shooting system at all, which is required for mode switching. It is effective in shortening the time and increasing the efficiency of treatment, processing, or examination, and in avoiding unnecessary X-ray exposure to the practitioner and the patient.

[Brief explanation of the drawing]

1 to 5 are explanatory diagrams of a two-way fluoroscopic imaging device according to an embodiment of the invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a side view, and FIGS. 3 a, b,
FIG. 4 is a block diagram of the control system, and FIG. 5 is an operation time chart. Further, FIGS. 6a and 6b are front views showing the sequential operations of the side photographing system of the conventional apparatus, and FIG. 7 is an operation time chart thereof. A...Front shooting system, B...Side shooting system, M...
Subject, 1... bed, 2... base, 3, 8...
C-shaped arm, 4, 9...X-ray tube device, 5, 10...
...Image receiving device, 6...Ceiling rail, 11, 12...
Potentiometer, 14... Side photographing system control unit.

Claims (1)

[Scope of utility model registration request] A C-shaped arm inserted from the head side of the patient is attached to a base set on the floor on the head side of the patient lying supine on the bed so that the angle can be adjusted around the patient's body axis. A front imaging system consisting of an X-ray tube device and an image receiving device at both ends of this C-shaped arm, and a movable table movable along the ceiling rail in the direction of the patient's body axis are installed around the patient. A C-shaped arm inserted from the side is attached around the subject's body axis so that its angle can be adjusted.
In a two-way fluoroscopic imaging device consisting of a side imaging system including an X-ray tube device and an image receiving device at both ends of this C-shaped arm, a park position of the side imaging system is set on the back side of the base, and An auxiliary park position is set between the base and the imaging device section of the frontal imaging system, and a means for detecting the angle around the subject's body axis for the frontal imaging system and a means for detecting the angle around the subject's body axis for the side imaging system are provided. A means for detecting the angle, a means for detecting the position of the side imaging system in the subject's body axis direction, and a means for detecting the position of the side imaging system in the subject's body axis direction. After rotating it to an angle that intersects the imaging system at a substantially right angle, in this state, move the side imaging system to the auxiliary park position, and at this auxiliary park position, set the lateral imaging system to a substantially horizontal and horizontal neutral position. Move it over the base to the park position, while
1. A two-way fluoroscopic photographing apparatus comprising: a side photographing system control means for operating the side photographing system in the reverse order when moving the side photographing system from the park position to the photographing position.