JPH0360627A - Electronic endoscope device - Google Patents

Abstract

PURPOSE:To observe the part irradiated with laser without being obstructed by halation caused by the reflex beam etc., by using only the image signal in a second period to the image display, wherein the second period is a short period inserted in the break of a first period with the laser irradiation. CONSTITUTION:Laser irradiation is made in the ODD field period by a laser pulsating circuit 23, and an image signal obtained in the EVEN field period with no laser irradiation is stored in an EVEN field memory 15, and image display is performed by the use of the image signal read-out this EVEN field memory 15. Because only the image signal in the EVEN field period in the break of the period with laser irradiation generating halation on the display screen is avoided, the part irradiated with the laser during irradiation can be observed without being obstructed by halation cause by the reflex beam etc.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an electronic endoscope device that displays an image based on an image signal obtained by an image sensor, and more specifically relates to an electronic endoscope device that displays an image based on an image signal obtained by an image sensor. This invention relates to improvements in electronic endoscope devices that can be applied to.

(Prior art) As is well known in this type of electronic endoscope device, illumination is provided from the distal end of the scope toward the subject, and the reflected light from this illumination is reflected from the distal end of the scope. An imaging device such as a CCD (hereinafter referred to as CCD) via an optical system
The image is captured by the camera, and the image signal obtained by this imaging is used to display the image on the display screen.

This type of electronic endoscope apparatus is used not only for observation and examination of internal organs in a subject's body cavity and for detection of diseased parts, but also for endoscopic treatment.

This endoscopic treatment involves performing treatments such as local injections and laser irradiation on the affected area within the subject's body cavity under endoscopic observation, and according to this laser irradiation.

Hemostasis and hardening of locally affected areas within the body cavity of subjects such as cancer clinics.

Treatments such as incision and expansion can be easily performed.

In such laser irradiation, the laser reflected light from the subject has higher brightness compared to the reflected light from the subject other than the laser irradiated area. Therefore, during the laser irradiation period,
When a CCD receives high-brightness light such as reflected light from a laser, scattered light from a laser, or light emitted from the combustion of the affected area irradiated with a laser, and displays an image using the image signal obtained by this CCD. In some cases, a problem occurred on one screen, obstructing observation of the affected area.

(Problem to be Solved by the Invention) In other words, conventionally, in this type of electronic endoscope, laser irradiation is continuously performed on the affected area for an appropriately set time, and the state of this laser irradiation is recorded at that time. Since the monitor was displayed on a display screen, halation caused by reflected laser light was continuously generated on the display screen, making it impossible to see changes in the affected area during laser irradiation.

The present invention has been made in consideration of the problems of the prior art, and is an electronic internal system that allows observation of the laser irradiated area during laser irradiation without being hindered by halation caused by laser reflected light. The purpose is to provide a viewing device.

[Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, the electronic endoscope device according to the present invention has an electronic endoscope system that uses an intermittently repeated intermittently set short period of time. pulsed laser irradiation means for irradiating a laser only during one of the first period and a second period provided between the first period; and an image obtained by an image sensor during a period in which the laser is not irradiated. A memory that stores signals, and an image signal that is read out from this memory and image @
The gist of the invention is to include a reading/displaying means for displaying the information.

(Operations) According to the above-mentioned configuration, the following operations are achieved. That is, like the two types of field periods in the 1-frame, 2-field screen system, the periods that are intermittently repeated in a short period of time are and a second period.

For example, the pulsed laser irradiation means irradiates the laser during the first period, and the image signal obtained during the second period when the laser light is not irradiated is stored in the memory and read out.The display means reads out the image signal from the memory. and image display, the image signal during laser irradiation is not used for image (a display,
A short period of time between periods of laser irradiation
Since only the image signal during the period is used for image display,
W on the laser irradiated area while it is being irradiated with the laser without being hindered by halation caused by laser reflected light, etc.
You will be able to guess it.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the main configuration of an electronic endoscope apparatus according to the present invention.

In FIG. 1, the electronic endoscope device is provided with a CPU as a control center, and the CPU 1 controls a CCU 7 and an A/D converter 9 for controlling a CCD 5 mounted on an endoscope 3. , switch 11. ○DD field memory 13 for storing image signals in the DD field period, E for storing image signals in the EVEN field period
VEN field memory 15. The D/A converter 17 and the like are controlled by a microprocessor. In addition,
The number 1 is a display.

In this CPUI, CCD5 as shown in Fig.
Using a signal synchronized with the DD field period and the EVEN field period, such as a vertical synchronization signal or a field index signal, switching control is performed on the switch 11, and a read command subleg for the EVEN field memory 15 is performed. conduct.

The CPU 1 also includes a laser pulsing circuit 23 that pulses and outputs a laser beam from a laser device 21 that generates a therapeutic laser in CW mode during the ODD field period, as shown as output A in FIG. It is connected. That is, the cPUl is formed by appropriately processing the signals synchronized with the respective fields, such as the vertical synchronization signal.
A signal that becomes °°H" within the D field period and °L°" during the E V E N field period is sent to the laser pulsing circuit 23. Also, based on this CPU signal, the laser pulse The conversion circuit 23 converts the laser beam from the laser device 25 generated by the aiming laser beam into a second one.
As shown as output B in the figure, it is pulsed and output during the EVEN field period.

It goes without saying that the treatment laser pulse irradiation is not limited to the ODD field period, and the aiming laser pulse does not necessarily need to be irradiated.

Next, the operation of the above embodiment will be explained.

Receives the signal from the CPUI and converts it into a laser pulse! ? 12
In 3, the therapeutic laser is pulsed during the DD field period, and the aiming laser is pulsed during the EVEN field period, and each is transmitted through an optical fiber disposed within the endoscope probe 3. The subject P is irradiated.

During this time, an image signal obtained by imaging the subject y and body P by the CCDI is sent to the A/D converter 9 via the CCU 7 and digitally converted there. Of this digitally converted image signal, ○DD field period l(
The image signal 01 in Fig. 2 is in the ODD field memory 13.
/'\, the image signal E between 1 and EVEN field law is E
Furthermore, the image signal 02 of ○DD field period 2 is transferred to the ODD field memory 15.
3, respectively, by switching the switch 11, and the j
'@N is written a lot.

Then, in EVEN field period 1, the CPUI
At the same time as reading the image signal E from the VEN field memory 15, in the DD field period 2, the image signal 02 stored in the DD field memory 13 is read, and the previous image signal E stored in the EVEN field memory 15 is read. Read out the image signal E of the period, that is, EV
EN field period n and ○DD field period n+
1, the image signal E is read out from the EVEN field memory 15 and sent to one display via the D/A converter 17, where the image is displayed.

Therefore, in this embodiment, the laser pulsing circuit 23 emits the entire laser beam during the DD field period, and the image signal obtained during the EVEN field period in which no laser light is irradiated is stored in the EVEN field memory 15.
The image signal read from this EVEN field memory 15 is used to display the image, and the I\relation occurs on one display screen.Display of the image signal during laser irradiation'! - Since only the image signal of the EVEN field Karima between the periods of laser irradiation is used for the image display, it is possible to display the image during the laser irradiation without being hindered by halation caused by laser reflected light, etc. tl the laser irradiated area
You will be able to guess it.

[Effects of the Invention] As explained above, in the electronic endoscope device according to the present invention, the first period that is set as appropriate and is repeated intermittently, and the period between the first periods. a pulsed laser irradiation means that irradiates the laser only during one of the months of the second period provided in the second period; This is a t4 configuration comprising a readout/display means for reading out a signal and displaying an image.

This configuration provides the following effects.

That is, like the two types of field periods in a 1-frame, 2-field screen system, periods that are repeated intermittently over a short period of time are set as the first period and the second period, and the pulsed laser irradiation means For example, if a laser is irradiated during a first period, an image signal obtained during a second period when no laser beam is irradiated is stored in a memory, and the image signal is read out from the memory and displayed by a readout/display means. , since the image signal during laser irradiation is not used for image display, and only the image signal of the short second period provided between the laser irradiation periods is used for image display, halation due to laser reflected light etc. It is possible to observe the laser irradiated area while it is being irradiated without being obstructed by the laser beam.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a main part of an embodiment of an electronic endoscope apparatus according to the present invention, and FIG. 2 is a time chart showing an embodiment of laser irradiation conditions. 1...CPLI 5...CCl3
...One EVEN field memory...Display 23...Laser pulse conversion circuit 25...Laser device

Claims (1)

[Claims] (1) A pulse that irradiates laser only during a first period that is set as appropriate and is repeated intermittently and a second period that is provided between the first periods. The invention is characterized by comprising: a laser irradiation means, a memory for storing an image signal obtained by an image sensor during a period when the laser is not irradiated, and a readout/display means for reading out the image signal from the memory and displaying the image. Electronic endoscope device.