JPS59230538A - Medical television system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a television system used in surgery, dental treatment, and the like.

Conventionally, for example, in the field of dental treatment, a treatment area as shown in FIG. 1 is directly photographed with a television camera 1.
A medical TenVision system is used to display this on a monitor television 2. This system is popular for educational purposes because it allows a large number of students to view the treatment status at the same time. However, during treatment, doctors observe the treatment area from various directions, whereas this system, which directly photographs the treatment area with a television camera, can only take images from one direction; When viewing vertically from the direction, move the television camera itself,
I had to adjust my focus each time. For this reason, conventional medical television systems are not suitable for dental treatment in which it is necessary to observe the treated area from all directions while performing the treatment, and are not widely used for purposes other than education.

Medical television systems similar to those used for dental treatment are also used in other medical fields such as surgery, but they are not widely used because the camera work is similarly complicated. has not been reached.

This invention was made in consideration of the above circumstances, and allows a doctor to use a television camera to project the surgical and treatment area from all directions on a monitor television while performing surgery and treatment. It provides a telepijo/system for users.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A medical television system installed in a dental medical facility will be described below as an embodiment of the present invention with reference to the drawings.

FIG. 2 shows a dental treatment facility equipped with an embodiment of the medical television system of the present invention, and the reference numeral 3 in the figure shows dental treatment equipment.
is a treatment chair. A pillar 4 is erected near the treatment chair 3. A television holding arm 6 on which a monitor television 5 is mounted is rotatably attached to the inside of the pillar 4. A flexible arm 8, which can move up and down and rotate freely, is rotatably attached to the upper end of the support column 4 to hold the television camera 7 at a desired position in the air. The television camera camera attached to the flexible arm 8 photographs the treatment area in the patient's oral cavity and sends the image to the monitor television 5. A zoom lens is preferably used as the lens 7a attached to the television camera 7. As shown in FIG. 3, a lens case 9 is fitted into the tip of the lens 7a. An optical door 11 is attached to this lens case 9 via a hood rotating device 10.
Illumination devices 12 are attached to both sides of the optical board 11.

As shown in FIG.
A round hole 13 with a center is opened and a round hole 13 with a
The surface opposite to the opened surface is completely open, and a glass plate 14 is attached to this open surface. Inside the optical hood 11, a plane mirror is mounted so as to face the mirror, one of the two mirrors is
A fixed mirror 15 is fixedly attached onto the light 411ila of the lens 7a, and the optical axis a is bent by the fixed mirror 15 to become an optical axis). The other of the two plane mirrors is provided on this optical axis, and is attached to a movable mirror 16 whose angle can be adjusted.

The fixed mirror 15 is the lens 7a of the television camera 7.
This is to change the direction of the optical axis a of the optical axis a, and the optical axis a is tilted with respect to the optical axis aK.
It is fixed within 1. Since the angle at which the fixed mirror 15 is tilted is set from the direction in which the original axis is guided, it is preferably about 45 degrees with respect to the optical axis a.

Movable mirror 1 provided opposite to this fixed mirror 15
6, change the direction of the optical axis C toward the subject in front of the television camera 7 (indicated by point P in treatment calculation diagram 4).
That is. The movable mirror 16 is tilted with respect to the optical axis on the original axis bent by the fixed mirror 15 and can be adjusted in positive and negative directions around an angle parallel to the fixed mirror 15. It is attached inside the optical hood 11 via a mirror receiving plate 17. The angle of this movable mirror 16 is 4
When the angle is 5 degrees, it is assumed that rotation is possible around 45 degrees with respect to the optical axis.

The mirror receiving plate 17 is plate-shaped as shown in FIG. 5, and has a shaft 17a in the center of its opposing edges.

1? A is missing, and a fixing nut 17b is attached to one end of the same edge for fixing the movable mirror 16 at a predetermined angle after it has been set at a predetermined angle. The movable mini 7-16 is attached to the mirror receiving plate 17, and the mirror receiving plate 17 is attached in the optical 7-door 11 so that the inclination of the rIl mirror 16 is at the above-mentioned angle. At this time, as shown in FIG. 5, the shafts 17 &, 17a of the mirror receiving plate 17 are rotatably supported by screws 19.19 inserted through holes 18.18 on both sides of the optical hood 110. has been done. Further, a fixing screw 21 inserted through an arc-shaped elongated hole 20 formed around the hole 18 on the side surface of the optical hood 11 is screwed into the fixing nut 17b of the mirror receiving plate 17.
This fixes the movable mirror 16 at a predetermined angle.

The hood rotation device 10 to which the optical hood 11 including the movable mirror 16 and the fixed mirror 15 is attached rotates the optical hood 11 about the optical axis a of the lens 7a.

As shown in FIG. 3, this hood rotation device 10 includes a fixed ring 22 fixed to the lens case 9, a rotating ring 23 fixed to the optical hood 11, and a rotating ring 22 fixed to the lens case 9.
3 and a drive device 24 for rotating it.

The fixing ring 22 fixed to the lens case 9 is ring-shaped, and a screw 22a is machined on the outer periphery of the lower part thereof. The rotating ring 23 fixed to the optical 7-door 11 is also in the shape of a ring, and the inner periphery of the upper part of the ring 23 has a screw 22a machined on the outer periphery of the fixed ring 22. A matching screw 23a is machined, and teeth 23b with a spur tooth ratio are machined around the outer periphery of the same end.

The fixed ring 22 and the rotating ring 23 are connected by screwing together the respective screws 22a and 23a with some allowance, thereby attaching the optical hood 11 to the lens case 9.

A drive device 24 for rotating the rotation ring 23 includes a motor 25 fixed to a chamfered corner 9a of the lens case 9, and a transmission section 26 into which a rotation shaft 25a of the motor 25 is inserted. The transmission section 26 includes a cap 26a into which the rotating shaft 25a of the motor 25 is inserted and rotates in the same manner as the rotating shaft 25a, and a single tooth 26b fitted onto the cap 26a. This single tooth 26b is a tooth 2 with a spur tooth ratio around the outer circumference of the rotary ring 23.
3b, and the rotation of the motor 25 is transmitted to the rotation ring 23 by this gear 26b. motor 25
The connection between the cap 26a, which rotates in the same manner as the rotating shaft 25a, and the gear 26b is designed to be released when the external force applied to the tooth J4L26b exceeds a predetermined value. The optical system 7- rotated by the drive device 24 as described above
The door 11 is regulated by a rotation stopper 27 protruding below the lens case 9 and a pin 28 of the rotation ring 23 protruding in the radial direction so that it stops after rotating a little less than 360'.

Next, a method of using the medical television system configured as described above will be explained.

First, the patient is placed on the treatment chair 3 shown in FIG. Next, as shown in FIG. 4, after positioning the television camera 7 so that the treatment field is at point P on the extension of the optical axis a of the lens 7a of the television camera 7, The angle of the movable mirror 16 is adjusted so that the treatment field P is reflected in the center of the mirror 16 (this operation is performed while viewing the image on the 72-inch television 5). At this time, the purpose of observing the field P is the angle formed by the optical axis a and the optical axis C. The doctor is
In this state, switch the foot switch 29 shown in Figure 2.
The optical hood 11 is rotated by operating the drive device 24 of the hood rotating device 10. , the treatment field P viewed from each direction is viewed on the screen displayed on the monitor television 5, and the treatment is performed. Here, if you want to change the angle at which you observe the treatment field P, change the distance between the television camera 27 and the city's field P and see if it suits you. For example, by positioning the treatment field at point P' in FIG. 4 and adjusting the movable mirror 16 to the angle indicated by 16', the treatment field P' can be adjusted. The viewing angle for cherry blossoms is optical axis a and optical axis C'
It becomes the purpose of doing.

The medical television system configured in this way is
The television camera is positioned so that the treatment field is at point P on the extension of the original axis a of the lens 7a of the television camera 7, and the treatment field P is moved using an optical system provided with a movable mirror 16 and a fixed mirror 15. Since the photograph is taken through the hood 11 and displayed on the monitor television 5, the television camera 7 is not moved and the optical hood 11 is simply rotated.
The condition of the child's treatment field can be seen from each direction, including the opposite direction. Moreover, since the photographed image is displayed on the monitor television 5, treatment can be performed without looking into the inside of the oral cavity. Furthermore, since the treatment field can be enlarged and displayed on the monitor television 5, the affected area can be easily observed. Furthermore, since the patient can watch the patient through the monitor television 5, the patient can be treated and observed in a position suitable for treatment. Furthermore, since the optical hood is rotated using the foot switch 29, the direction of observation can be changed while performing treatment.

Furthermore, since the illumination device 12 is attached to the optical hood 11, the television camera 7 and the illumination device 12 can be moved at the same time. The telepijo/system of the present invention can be handled using the same operations as those previously used. Furthermore, by providing the optical hood 11, it becomes possible to photograph the treatment needle viewed from an angle without tilting the television camera 7, and the optical 7
- By rotating the door 11, observations can be made from all directions, so there is less need to move the television camera 7 over the patient's face, and the patient does not feel a sense of pleasure.

In the above explanation, two mirrors, a fixed mirror 15 and a variable mirror 16, were provided in order to set the optical axis a to the optical axis C, but the same effect can be obtained even if a prism is used instead of the mirror. effect can be obtained. Regarding the position of the treatment needles P and P', it has been described that they are on the optical axis a of the lens 7a of the television camera 7, but the tilt of the movable mirror 16 is moved closer to the optical axis as shown by 16" in FIG. When the optical axis C is changed in the direction, the optical axis C bent by the movable mirror 16 moves in a direction away from the optical axis a, as shown by C'' in FIG. With the movable mirror 16'' in this state, the television camera 27 can take pictures of a position away from the front of the television camera 2, so if the television camera 7 or the like is placed on the face of the patient with the treatment needle, urine will be urinated. Furthermore, if the distance between the fixed mirror 15 and the movable mirror 16 is made flexible, even if the distance between the television camera 7 and the treatment needle is constant, the purpose of photographing (optical axis a)
and the angle between the optical axis C and the optical axis C). Furthermore, have you adjusted the position of the television camera 7? LFli emits light along the original axis a of the lens 7a to assist in eliminating
It is also possible to provide a light source such as a D lamp at the bottom of the optical board 11. Furthermore, the angle of inclination of the movable mirror 16 can be adjusted not only by the method of moving it as shown in the embodiment, but also by moving it using a motor or by installing it near the front plate or the like. It can also be used for cutting and other medical purposes.

As explained above, in the medical television system of the present invention, the television camera is provided with a base rod that rotates around the optical axis of the lens, and the optical hood is provided with a base rod that rotates around the optical axis of the lens. It is equipped with an okiya mirror or prism that bends the original axis approximately to the moon, and a movable mirror or prism that further bends the original axis bent by this fixed mirror or prism, so the doctor can prepare the body in a position suitable for treatment. You can observe Ma, Ji W, and No from H Mochizuki from each direction through the monitor television, and the screen reflected on the monitor television is also very detailed. This makes the system useful for accurate diagnosis and treatment.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a conventional medical television system, and Figs. 2 to 6 show an embodiment of the medical television system of the present invention. Figure 3 is a perspective view of the tip of the television camera, Figure 4 is a sectional view of the same, Figure 5 is a perspective view of the mirror plate, Figure 6 is the optical hood of the mirror receiving plate. This is a sectional view showing the state of installation. 5... Monitor television, 7... Television camera, 7a... Lens, ll... Optical hood, 1"
5... Fixed mirror, 16... Movable mirror, a...
Optical axis, b... Optical axis, C... Original axis, P... Treatment needle. Applicant Toji Giken Co., Ltd. Figure 2 Figure 6 Figure 7n

Claims (1)

[Claims] In a medical television system that consists of a television camera that is installed around the treatment table and photographs the medical object, and a monitor television that displays the images obtained by this television camera, the television camera has this An optical hood is provided that rotates around the optical axis of the lens of the television camera, and this optical hood includes a fixed mirror or prism that bends the optical axis of the lens at a substantially right angle, and a fixed mirror or prism that bends the optical axis of the lens at a substantially right angle. A medical television system characterized by being provided with a movable mirror or prism that further bends the optical axis.