JPH0698119B2 - Electronic endoscopic device - Google Patents

Description

Description: [Object of the Invention] (Industrial field of application) The present invention relates to an electronic endoscope apparatus for displaying an image based on an image signal obtained by an image pickup device, and more particularly to a laser treatment. The present invention relates to improvements in applicable electronic endoscope apparatuses.

(Prior Art) As is well known, in this type of electronic endoscope apparatus, illumination is performed from the distal end of the scope toward the subject, and the reflected light from this illumination is transmitted to the optical end of the scope. An image is picked up by an image pickup device such as a CCD (hereinafter referred to as CCD) through the system, and an image is displayed on a display screen by using an image signal obtained by this image pickup.

This type of electronic endoscope apparatus is used not only for observing and examining internal organs in the body cavity of a subject and for detecting an affected area, but also for endoscopic treatment.

This endoscopic treatment is to perform treatment such as local injection or laser irradiation on an affected area in a body cavity of a subject under observation with an endoscope. Procedures such as hemostasis, hardening, incision, and dilatation of the internal local affected area can be performed easily.

In such laser irradiation, the reflected light of the laser from the subject has higher brightness than the reflected light from the subject other than the laser irradiation site. Therefore, during the laser irradiation period,
The reflected light of the laser, or the scattered light of the laser or the light with high brightness such as the light emitted by the combustion of the affected area irradiated by the laser is directly received by the CCD, and the image is displayed using the image signal obtained by this CCD, the screen is displayed. Occasionally, halation occurs on the skin, which hinders observation of the affected area.

(Problems to be Solved by the Invention) That is, conventionally, in this type of electronic endoscope, laser irradiation is continuously performed for an appropriately set time on the affected area, and the state of this laser irradiation is directly displayed on the display screen. Since it was monitored above, halation due to the reflected light of the laser and the like was continuously generated on the display screen, and it was not possible to confirm the change in the affected area during the laser irradiation.

The present invention has been made in consideration of such problems of the conventional technique, and it is possible to observe the laser irradiation site during laser irradiation without being hindered by halation due to laser reflected light or the like. An object is to provide an endoscope device.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve this object, the present invention provides a first period which is set appropriately and is intermittently repeated, and the first period. A pulsed laser irradiation means for irradiating a laser in the first period, a memory for storing an image signal picked up by an image pickup means in the second period, Display means for reading and displaying an image from the memory during the first period is provided.

(Operation) According to the above configuration, the following operation is achieved. That is, like the two types of field periods in the one-frame two-field screen method, the periods that are intermittently repeated in a short period are set to the first period and the second period, respectively, and the pulsed laser irradiation means is used. For example, if the laser is irradiated during the first period, the image signal obtained during the second period during which the laser light is not irradiated is stored in the memory, and the reading / display means reads the image signal from the memory and displays the image. , The image signal during laser irradiation is not used for image display, and only the image signal for the second short period provided between laser irradiation periods is used for image display. Therefore, it is possible to observe the laser-irradiated portion during the laser irradiation without being hindered by the laser irradiation.

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

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

In FIG. 1, the electronic endoscope apparatus is provided with a CPU 1 as a control center, and the CPU 1 controls a CCU 7 for controlling a CCD 5 mounted on the endoscope scope 3 and an A / D converter 9 The microprocessor 11, the switcher 11, the ODD field memory 13 for storing the image signal in the ODD field period, the EVEN field memory 15 for storing the image signal in the EVEN field period, the D / A converter 17, etc. . Reference numeral 19 is a display.

In the CPU 1, the switching control for the switching unit 11 is performed using a signal synchronized with the ODD field period and the EVEN field period, such as a vertical sync signal for CCD5 or a field index signal as shown in FIG. Read command control for the field memory 15 is performed.

Further, the CPU 1 is provided with a laser pulsing circuit 23 for pulsing and outputting the laser light from the laser device 21 for generating a treatment laser by CW in the ODD field period as shown as A output in FIG. It is connected. That is, from the CPU 1, a signal which is formed by appropriately performing signal processing on a signal synchronized with each field such as the vertical synchronization signal and which is “H” in the ODD field period and “L” in the EVEN field period is a laser pulse. Sent to the conversion circuit 23. Also, this CPU1
Based on the signal from, the laser pulsing circuit 23, the laser light from the laser device 25 that generates a laser for aiming in CW,
As shown as B output in FIG. 2, it is pulsed and output during the EVEN field period. Needless to say, the irradiation of the therapeutic laser pulse is not limited to the ODD field period, and the irradiation of the aiming laser pulse does not necessarily have to be performed.

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

In response to the signal from the CPU 1, in the laser pulsing circuit 23, the treatment laser is pulsed during the ODD field period, and the aiming laser is pulsed during the EVEN field period. The subject P is irradiated with the light through the optical fiber arranged in.

During this time, the image signal obtained by imaging the subject P with the CCD 1 is sent to the A / D converter 9 via the CCU 7 and is digitally converted there. Among the digitally converted image signals, the image signal O _{1 in} the ODD field period 1 (FIG. 2) is stored in the ODD field memory 13, the image signal E _{1 in the} EVEN field period ₁ is stored in the EVEN field memory 15, and , image signals O ₂ of the ODD field period 2 to ODD field memory 13, respectively sent in the shift of the switch 11, are sequentially written therein.

Then, the CPU ₁ reads out the image signal E ₁ from the EVEN field memory 15 in the EVEN field period ₁ and reads the ODD.
In the field period 2, the image signal O ₂ stored in the ODD field memory 13 is not read out, but the image signal E ₁ in the previous period stored in the EVEN field memory 15 is read out. That is, over the EVEN field period n and ODD field period n + 1, EVEN from the field memory 15 the image signal E _n read, via the D / A converter 17 is sent to the display 19, wherein the image is displayed.

Therefore, in this embodiment, the laser pulsing circuit is
Laser irradiation is performed during the ODD field period by 23, and the image signal obtained during the EVEN field period during which the laser light is not emitted is stored in the EVEN field memory 15, and an image is displayed using the image signal read from the EVEN field memory 15. , The image signal during laser irradiation that causes halation on the display screen is avoided, and only the image signal during the EVEN field period between laser irradiation periods is used for image display, so it is possible to prevent halation by laser reflected light, etc. It is possible to observe the laser-irradiated portion during the laser irradiation without being disturbed.

[Effects of the Invention] As described above, according to the present invention, the following effects can be achieved. That is, as in the two types of field periods in the one-frame two-field screen method, the first period is a period that is intermittently repeated in each short period.
And the second period, and the pulsed laser irradiating means irradiates the laser, for example, in the first period, and stores and reads the image signal obtained in the second period in which the laser light is not irradiated in the memory. When the image signal is read from the memory and displayed by the display means, the image signal during laser irradiation is not used for image display, and the second short period is provided between laser irradiation periods. Since only the image signal is used for image display, it is possible to observe the laser-irradiated portion during laser irradiation without being hindered by halation due to laser reflected light or the like.

[Brief description 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 a laser irradiation situation. 1 ... CPU, 5 ... CCD 15 ... EVEN field memory 19 ... Display 23 ... Laser pulsing circuit 25 ... Laser device

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Susumu Shimizu 1385-1 Shimoishigami, Otawara City, Tochigi Prefecture Toshiba Medical Engineering Co., Ltd. (56) References JP 61-94644 (JP, A)

Claims (1)

[Claims] 1. A laser irradiation is provided in the first period, which comprises a first period which is a short period which is set appropriately and which is intermittently repeated, and a second period which is provided between the first period. Pulsed laser irradiation means, a memory for storing an image signal imaged by the imaging means during the second period, and a display means for reading out and displaying an image from the memory during the first period. An electronic endoscope device characterized by: