JPH07299063A - Fluoroscopic radiography device - Google Patents

Abstract

PURPOSE:To provide a highly safe fluoroscopic radiography device in which the nipping of finger or falling from bed of a testee can be prevented. CONSTITUTION:The antenna of a touch sensor 20 is built in a holding bar 9 provided on both side parts of a bed on which a testee is laid. The touch sensor 20 detects a change of electrostatic capacity when the testee holds the holding bar 9. A relay coil 21 is excited on the basis of this detection signal to close a contact group 22. Thus, bed driving motors 12-14 are laid in the operable state by an operating switch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopic imaging apparatus, and more particularly to a technique for preventing a subject lying on a tiltable bed from falling and preventing the subject from getting caught on the finger.

[0002]

2. Description of the Related Art Conventionally, in an X-ray fluoroscopic imaging apparatus, when a digestive system such as a stomach is imaged, a bed on which a subject is supine is placed in order to flow a contrast agent (barium) to a desired site. It is configured such that it can be rotated in a forward tilting posture (inclined posture in which the subject's head is up) or in a reverse leaning posture (inclined posture in which the subject's head is down). In addition, during shooting, make sure that the subject lying on the horizontally movable table does not get caught in the gap between the table and the main body of the bed, and that it does not fall from the bed when shooting in the reverse tilt position. In order to
After instructing the subject to hold the grip bar provided on the side of the bed, the operator moves the tabletop and tilts the bed to move the X-axis.
I try to do fluoroscopic photography.

[0003]

However, the conventional example having such a structure has the following problems. Since the operator moves the tabletop or bed while observing the fluoroscopic image on the TV monitor in the operation room different from the examination room where the X-ray fluoroscopic imaging apparatus is installed, the operator selects the imaging site. When the subject removes his / her hand from the grip bar, it may not notice it. As a result, when the subject releases the grip bar, the top plate or the bed may be moved, which may cause the subject to clog his finger or drop when the subject leans backward.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a highly safe X-ray fluoroscopic apparatus which prevents the subject's fingers from being clawed or dropped from the bed. Has an aim.

[0005]

The present invention has the following constitution in order to achieve such an object. That is, according to the present invention, in an X-ray fluoroscopic imaging apparatus including a bed that can be horizontally moved and tilted, a grip bar provided on a side portion of the bed and gripped by a subject, and the grip bar gripped by the subject. Detection means for detecting that
And a control means for setting the drive motor group of the bed based on a detection signal from the detection means so as to be operable by an operation switch.

[0006]

The operation of the present invention is as follows. When the subject lying on the bed holds the grip bar on the side of the bed, the detection means detects this and gives the detection signal to the control means. As a result, the control means makes the bed driving motor group operable by the operation switch, so that the bed moves even if the operation switch is inadvertently operated while the subject is not holding the grip bar. There is no.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view showing a schematic configuration of an X-ray fluoroscopic imaging apparatus according to the present invention.

This X-ray fluoroscopic apparatus is provided with a base 1 fixedly installed on the floor, a bed 2 supported by the base 1 so as to be tiltable and rotatable around a horizontal axis, and a back of the bed 2. And the X-ray tube 4 mounted via a support frame 3 standing upright on the bed 2.
An image intensifier 5 located on the irradiation axis of the X-ray tube 4, a television camera 6, and a magazine storage section 7 for film for photographing images are provided in the lower part of the. The bed 2 is provided with a horizontally movable top (left and right and front and rear in FIG. 1) on which the subject M is placed. Grip bars 9 for gripping the subject M are provided on both sides of the top plate 8, respectively.

The bed 2 side is provided with a large-diameter fan gear 10 centered on the horizontal axis, and the base 1 side is provided with
A pinion gear 11 that meshes with the fan-shaped gear 10 is provided, and the bed 2 can be tilted by rotating the pinion gear 10 forward and backward by an electric motor (not shown). In addition, when the bed 2 is tilted,
In order to avoid the edge of the bed from touching the floor, the bed 2
Is driven to slide in the longitudinal direction of the bed by a slide driving mechanism (not shown).

FIG. 2 is a circuit diagram showing a schematic configuration of a control system which is provided for the safety of the subject M and is a main part of this embodiment.

In the figure, reference numeral 12 is a motor for tilting the bed connected to the pinion gear 11 shown in FIG. 1, 13 is a left and right driving motor for the top 8, and 14 is a front and back driving motor for the top 8. . Reference numeral 20 is a touch sensor electrically connected to the grip bar 9. The grip bar 9 is electrically insulated from the ground, and the antenna (electrode) of the touch sensor 20 is built therein. When the subject M grips the grip bar 9, the capacitance of the grip bar 9 changes, and the touch sensor 20 detects the change and outputs a detection signal. A similar touch sensor 20 is also connected to another grip bar 9 provided on the opposite side of the top plate 8.

Detection signals of the two touch sensors 20 are given to the relay coil 21 via an AND gate AND. The relay coil 21 opens and closes a contact group 22 connected to the three-phase power sources U, V, W of the motors 12 to 14, respectively. The relay coil 21 and the contact group 22 correspond to the control means in this invention. Also, each motor 12-1
Contact groups 23 to each of the three-phase power supply lines branched to 4
25 are intervening. These contact groups 23 to 25 include three relay coils (not shown) that are excited by operating three operation switches (not shown) for individually driving the motors 12 to 14, respectively. ) Is opened and closed.

Next, the operation of the above-described embodiment apparatus will be described. When the subject M lies on the top plate 8 of the bed 2 and grips the pair of grip bars 9 on both sides of the top plate 8, the touch sensors 20 connected to the grip bars 9 are connected to the grip bars 9 respectively. The change in the electrostatic capacitance of is detected, and the "H" level detection signal is output. As a result, the AND gate AND outputs a signal at the “H” level, and the relay coil 21 is excited to close the contact group 22. As a result, each of the motors 12 to 14 is in a state in which it can be operated by the corresponding operation switch. For example, when the operation switch for tilting the bed is operated, the contact group 23 corresponding thereto is operated.
When the bed is closed, the motor 12 for tilting the bed is driven.
Is driven.

On the other hand, when the subject M lying on the top 8 does not hold both grip bars 9 yet, or the top 8 or the bed 2
If the gripping bar 9 is released during the movement of, the output signal of at least one of the touch sensors 20 becomes the “L” level and the relay coil 21 is not excited, so that the contact group 22 is opened. Therefore, even if the subject M does not grip the grip bar 9, the motors 12 to 14 are not driven even if the operation switches of the motors 12 to 14 are operated (stopped when driving). The subject M squeezes his fingers,
Alternatively, it does not fall from the bed 2.

The present invention can be modified as follows. (1) Two elongated electrodes are arranged facing each other on the surface of the grip bar 9,
It may be possible to detect that the subject M grips the grip bar 9 by detecting a resistance change between the electrodes when the subject M grips the grip bar 9.

(2) In the above-described embodiment, when the touch sensor 20 outputs a signal of "L" level (non-grasping state), the alarm lamp is turned on or the buzzer sounds. The operator M may be notified that the subject M is not gripping the grip bar 9.

(3) Although the control means is composed of the relay (relay coil 21 and contact group 22) in the above, the output state of the touch sensor 20 is monitored by the CPU, and the touch sensor 20
It is also possible to realize it by computer software that permits the drive command of each of the motors 12 to 14 only when the output signal of the gripping state is output.

[0018]

As is apparent from the above description, according to the present invention, the bed does not move even when the operation switch is operated when the subject lying on the bed does not hold the grip bar. Therefore, it is possible to prevent the subject's fingers from being clawed and dropping from the bed. Also, for the operator,
The burden of frequently confirming that the subject holds the grip bar during the examination is reduced.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of an X-ray fluoroscopic imaging apparatus according to the present invention.

FIG. 2 is a circuit diagram of a main part of the embodiment apparatus.

[Explanation of symbols]

 2 bed 8 top plate 9 grip bar 12 to 14 motor 20 touch sensor 21 relay coil 22 contact group

Claims (1)

[Claims] 1. An X equipped with a bed which can be horizontally moved and tilted.
In the fluoroscopic imaging apparatus, provided on the side of the bed,
The gripping bar gripped by the subject, the detection means for detecting that the gripping rod is gripped by the subject, and the drive motor group of the bed are operated by the operation switch based on the detection signal from the detection means. An X-ray fluoroscopic imaging apparatus, comprising: a control means for enabling the state.