WO2004112591A1 - 内視鏡装置 - Google Patents
内視鏡装置 Download PDFInfo
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- WO2004112591A1 WO2004112591A1 PCT/JP2004/008918 JP2004008918W WO2004112591A1 WO 2004112591 A1 WO2004112591 A1 WO 2004112591A1 JP 2004008918 W JP2004008918 W JP 2004008918W WO 2004112591 A1 WO2004112591 A1 WO 2004112591A1
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- Prior art keywords
- observation mode
- endoscope
- observation
- signal processing
- light
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/045—Control thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00059—Operational features of endoscopes provided with identification means for the endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/043—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances for fluorescence imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0638—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements providing two or more wavelengths
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0646—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements with illumination filters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0655—Control therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0669—Endoscope light sources at proximal end of an endoscope
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/555—Constructional details for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes
Definitions
- the present invention relates to an endoscope apparatus, and more particularly, to an endoscope apparatus which supports a plurality of observation modes (observation methods) and which can be executed by switching between observation modes by a user.
- an endoscope apparatus that irradiates illumination light to obtain an endoscopic image of a body cavity has been widely used.
- the illumination light from the light source device is guided into the body cavity using a light guide or the like to irradiate the subject, and the return light is transmitted to an endoscope using a solid-state imaging device.
- a signal processing device hereinafter, processor
- an endoscopic image can be displayed on an observation monitor so that living tissue can be observed.
- the light source device When performing normal biological tissue observation with an endoscope, the light source device emits white light in the visible light region (hereinafter, “normal light”) and converts the light into plane-sequential light through a rotating filter such as RGB. Then, a color image is obtained by irradiating the subject with an image signal and synchronizing the image signal based on the return light with a processor and performing image processing.
- a color chip is arranged in front of the imaging surface of the solid-state imaging device of the endoscope, and the return light due to normal light is separated into RGB by a color chip to capture an image, and the image is processed by a processor. Get more color images.
- An endoscope apparatus for observing external light has been proposed. Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 2000-955635, blue narrow-band light is applied to living tissue as illumination light, and the vicinity of the mucosal surface layer of the living tissue is irradiated. There has been proposed an endoscope apparatus for narrow-band light observation capable of observing a subject.
- the endoscope used for these observations can perform at least two types of observations: normal light observation and at least one special light observation.
- an endoscope for fluorescence observation allows normal light observation and fluorescence observation, and is for infrared light observation;
- an endoscope device allows normal light observation and infrared light observation and a narrow band light With the observation endoscope, normal light observation and narrow-band light observation are possible.
- the switching operation between the normal light observation and the special light observation in the endoscope apparatus for special light observation is performed by a switch provided on a front panel of an operation unit of the endoscope, a processor, and a luminous device. It is performed by key operation of the keyboard.
- an endoscope for fluorescence observation supports three types of observation modes: normal light observation, fluorescence observation, and narrow-band light observation, and an endoscope for infrared light observation has normal light observation, infrared light observation,
- the three types of narrow-band light observation, the endoscope for normal light observation are compatible with two types of observation modes: normal light observation and narrow-band light observation.
- any endoscope can be used because an endoscope for normal light observation is used.
- the connected endoscope is not compatible when switching the observation mode sequentially with only one switch. Observation modes may also be selected.
- the user needs an extra switch operation, which is cumbersome when switching between normal light observation and special light observation, and lowers the inspection efficiency.
- each endoscope has a priority in the corresponding special light observation mode.
- an endoscope for fluorescence observation supports two types of special light observation: fluorescence observation and narrow-band light observation, but narrow-band light observation must be an observation mode that can be used with other endoscopes.
- the priority of fluorescence observation is high in the special light observation mode.
- the order of normal light observation ⁇ narrow band light observation ⁇ infrared light observation ⁇ fluorescence observation If it is set, the narrow-band light observation with lower priority is selected first, even if the endoscope for fluorescence observation is connected, and the priority of the observation mode according to the type of endoscope is changed. There is a problem that it is not reflected.
- the present invention has been made in view of the above circumstances, and in an endoscope apparatus corresponding to a plurality of observation modes, the connected endoscope is supported by switching the observation mode.
- the purpose of the present invention is to provide an endoscope apparatus that can be selected and executed only in the observation mode in which the observation mode is set. Disclosure of the invention
- An endoscope apparatus includes an imaging device for imaging a subject, an endoscope capable of observing the subject in a predetermined observation mode, a signal from the imaging device being input, and The signal processing corresponding to a plurality of observation modes including the observation mode of the present invention can be executed, and the observation mode relating to the connected endoscope is determined based on information from the connected endoscope.
- a signal processing device having an identification unit for identifying, and enabling only signal processing corresponding to the observation mode identified by the identification unit; BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a block diagram showing an overall configuration of an endoscope apparatus according to a first embodiment of the present invention.
- FIG. 2 is a diagram illustrating a filter plate in the endoscope apparatus according to the first embodiment.
- FIG. 3 is a view showing a rotary filter plate in the endoscope apparatus according to the first embodiment.
- FIG. 4 is a diagram showing transmission characteristics of an RGB filter in the endoscope apparatus according to the first embodiment.
- FIG. 5 is a diagram showing transmission characteristics of the fluorescence observation filter in the endoscope apparatus according to the first embodiment.
- FIG. 6 is a block diagram showing the configuration of the high-sensitivity CCD used in the endoscope apparatus according to the first embodiment.
- FIG. 7 is a block diagram showing a color balance correction circuit in the endoscope apparatus according to the first embodiment.
- FIG. 8 is a block diagram showing a configuration of a structure enhancement processing circuit in the endoscope apparatus according to the first embodiment.
- FIG. 9 is an explanatory diagram showing the principle of the electronic shutter in the endoscope device according to the first embodiment.
- FIG. 10 is an explanatory diagram of an electronic shutter having a different speed for each color in the endoscope apparatus of the first embodiment.
- FIG. 11 is a timing chart showing color balance variation correction by adjusting the lamp drive current duty ratio in the endoscope apparatus of the first embodiment.
- FIG. 12 is a block diagram showing an entire configuration of an endoscope apparatus according to a second embodiment of the present invention.
- FIG. 13 is a block diagram showing an overall configuration of an endoscope apparatus according to a third embodiment of the present invention.
- FIG. 14 is a front view showing a configuration of a keyboard in the endoscope apparatus according to the third embodiment.
- a corresponding observation mode of a connected endoscope has a higher priority.
- the image is switched in order, and the appropriate image is selected according to the observation mode according to the switching operation. -G-is obtained.
- FIG. 1 is an overall configuration diagram of an endoscope apparatus according to a first embodiment of the present invention.
- an endoscope device includes a light source device 1 for emitting light for observation, and an endoscope (hereinafter referred to as a scope) for entering a body cavity. 2), a processor 3 for signal processing of the image signal captured by the scope 2, an observation monitor 4 for displaying an endoscope image, and recording the encoded endoscope image as a compressed image. It comprises a digital filing device 5 and a photographing device 6 for recording an endoscope image as a photograph.
- the light source device 1 includes a lamp driving circuit 7 for driving the lamp, a lamp 8 such as a xenon lamp for irradiating light, and a plurality of lamps 8 provided on the illumination light path of the lamp 8 and having different transmission wavelength bands for each observation mode.
- a filter turret 10 that can switch the optical filters by driving the motor 9, an illumination light aperture 11 that limits the amount of irradiation light, and R, G, and B surface sequential lights
- the motor 13 for rotating the rotary filter 12, and the filters provided on the inner and outer peripheral sides of the rotary filter 12, respectively.
- the filter retlet 10 has a disk shape, has a center as a rotation axis, and has a plurality of optical filters having different transmission wavelength bands for each observation mode.
- An optical filter corresponding to the selected observation mode is fixed on the optical path.
- the optical filter a normal light observation filter 17, a fluorescence observation filter 18, an infrared light observation filter 19, a narrow band light
- An observation filter 20 is provided as the optical filter.
- the rotary filter 12 has a disk-like structure and has a double structure with the center as the rotation axis, and the outer periphery transmits light of red, green, and blue wavelengths, respectively.
- the R filter 21a, the G filter 21b, and the B filter 21c are arranged.
- G that transmits 540-560 nm narrow-band light, G filter 22 a, excitation filter 22 b that transmits 395-475 nm excitation light, and R that transmits 600-620 nm narrow-band light , Filter 22c are arranged.
- the portion of the rotary filter 12 other than where the filters are arranged is configured by a member that blocks light.
- Fig. 4 is a graph showing the transmission characteristics of the RGB filter
- Fig. 5 is a graph showing the transmission characteristics of the fluorescence observation filter.
- the horizontal axis represents the wavelength
- the vertical axis represents the transmittance.
- the illumination wavelength in the special light observation mode is 395 to 475 nm in the fluorescence observation mode, or the excitation wavelength is 395 to 475 nm, due to the combination of the filter turret 10 and the rotating filter 12.
- 395 nm to 445 nm, green reflected light 540 to 560 nm, red reflected light 600 to 620 nm, three wavelengths of 940 nm, 805 nm, and 805 nm in the observation mode using infrared light, and central wavelength in the observation mode using narrow band light Are three wavelengths of 415 nm, 540 nm, and 61 Onm.
- the light passes through the normal light observation filter 17 of the filter turret 10, but this filter 17 transmits visible light, and the spectral characteristics are the same as in FIG. It is.
- the scope 2 includes a light guide 15 for transmitting illumination light incident from the light source device 1 to the distal end of the scope, objective optical lenses 23 3 and 24 for receiving return light from a subject based on the illumination light, and an optical system.
- a plurality of relay switches 29, 30 for switching the mode, and a mode in which the observation mode information corresponding to the scope 2, the priority of the observation mode, the electronic shutter speed, and the like are stored. It comprises a co-op information storage element 31 and an observation mode switching switch 32 for switching the observation mode by a switch operation.
- Processor 3 includes preprocessing circuit 33, AZD conversion circuit 34, color balance correction circuit 35, multiplexer 36, synchronization memory 37, 38, 39, image processing circuit 40, and DZA conversion.
- the circuit is configured so that image signals flow in the order of 41, 42, and 43.
- the CPU 44, the observation mode switching circuit 45, the normal CCD driver 46, the high-sensitivity CCD driver 47, and the CCD selector A digital light control circuit 49, an electronic shutter control circuit 50, a light source control circuit 51, and an encoding circuit 52.
- the endoscope device When the power is turned on while the scope 2 is connected to the light source device 1 and the processor 3, the endoscope device is normally started in the light observation mode. At the same time as the startup, the type of observation mode corresponding to Scope 2 and its priority are read by the CPU 44 in Processor 3 from the scope information storage element 31 of Scope 2. Issued and stored.
- observation modes that are not supported by Scope 2 are not stored. Therefore, the switching operation of the observation mode after startup is performed based on the information stored in the CPU 44. When the switching operation of the observation mode is performed with only the switch 32, the switch operation is performed. Each time, the observation mode is switched from the observation mode with the highest priority to the normal light observation after one round.
- observation mode switching circuit 45 When switching the observation mode, by pressing the observation mode switching switch 32 provided on the operation unit of the scope 2, a signal for instructing the switching of the observation mode is generated. Input to observation mode switching circuit 45 in 3. At the same time, stored in CPU 44 The type of observation mode of scope 2 and its priority are also input to the observation mode switching circuit 45. In the observation mode switching circuit 45, when the signal from the observation mode switching switch 32 is input, the observation mode that has been operating until just before the observation mode switching switch 32 is pressed. An observation mode identification signal indicating the observation mode after switching is output based on the information and the priority information of the immediately preceding observation mode, and the priority information of the new observation mode is output to the observation mode switching circuit. 4 Stored in memory (not shown) provided in 5.
- the observation mode identification signal output from the observation mode switching circuit 45 is the CCD selector 48 in the processor 3, the color balance correction circuit 35, the synchronization memory 37, 38, 39, and the image.
- the processing circuit 40, the dimming circuit 49, the electronic shutter control circuit 50, and the light source control circuit 51 are transmitted to the relay switches 29 and 30 in the scope 2.
- the CCD selector 48 determines whether or not the switched observation mode is fluorescence observation based on the observation mode identification signal. In the case of fluorescence observation, autofluorescence from living tissue based on the irradiated excitation light is observed. However, since autofluorescence is very weak light, high-sensitivity CCD28 is often used.
- a high-sensitivity CCD 28 can be used in a device by inputting a control pulse from outside the device.
- a CCD that can control the signal amplification rate is adopted.
- FIG. 6 is an explanatory diagram of the high sensitivity CCD.
- CMD Charge Multiplication Device
- the CMD can be arranged for each pixel and amplify for each pixel, or it can be arranged for a transfer channel and amplify for each transfer line.
- the CCD selector 48 determines that the observation mode after switching is fluorescence observation, the CCD selector 48 sends a signal to the normal CCD driver 46 to instruct the CCD 27 to stop generating drive signals. At the same time, a signal instructing generation of a drive signal for the high-sensitivity CCD 28 is output to the high-sensitivity CCD driver 47.
- the CCD selector 48 stops generating the drive signal of the high-sensitivity CCD 28.
- the instruction signal is output to the high-sensitivity CCD driver 47, and at the same time, the signal instructing the generation of the drive signal of the CCD 27 is output to the normal CCD driver 46.
- the CCD selector 48 does not output any signal.
- the CCD drive signal output from the normal CCD driver 46 or the high-sensitivity CCD driver 47 is input to the relay switch 29 in the scope 2.
- the switching operation of the relay switch 29 is based on the observation mode identification signal output from the observation mode switching circuit 45 of the processor 3.
- the drive signal output from the high-sensitivity CCD driver 47 is output to the high-sensitivity CCD 28 for fluorescence observation, while the normal CCD driver is used for observation modes other than fluorescence observation.
- the drive signal output from 4 6 is output to CCD 27.
- An image signal (CCD output signal) of the subject imaged by the CCD 27 or the high-sensitivity CCD 28 is input to the processor 3 via the relay switch 30.
- the relay switches 29 and 30 may be either mechanical or electrical.
- the image signal input to the processor 3 is first input to the pre-processing circuit 33.
- the pre-processing circuit 33 an image signal is extracted by a process such as CDS (correlated double sampling).
- CDS correlated double sampling
- the signal output from the pre-process circuit 33 is converted from an analog signal to a digital signal by the A / D conversion circuit 34 and input to the color balance correction circuit 35.
- This circuit is sometimes called a white-light lance circuit in normal light observation.
- the color balance correction circuit 33 is a non-volatile memory for storing the three force balance correction coefficients, and is a color balance correction coefficient storage memory. a, 57 b and 57 c, a selector 58 for selecting a color balance correction coefficient, and a multiplier 59.
- the selector 58 stores the color balance correction coefficient storage memory 57 a at the timing when the R filter 2 la or G and the filter 22 a are inserted in the optical path, and the G filter 21 b or the excitation filter 22.
- the color balance correction coefficient storage memory 57 b is used.
- B filter 21 c or R 'filter 22 c is inserted in the optical path, the color balance correction coefficient storage memory 57 b is used.
- the balance correction coefficient memory memory 5 7 c is selected.
- the multiplier 59 multiplies the input image signal by the color balance correction coefficient selected by the selector 58 and outputs the result.
- the color balance correction coefficient calculated by the CPU 44 is written in each color balance correction coefficient storage memory.
- the color balance correction coefficient storage memories 57a, 57b, and 57c the color balance correction coefficient is determined by the observation mode identification signal input from the observation mode switching circuit 45. Data is stored and read in different address areas for each mode.
- the image signal output from the color balance correction circuit 35 is image-sequentially synchronized by the multiplexer 36 and the synchronization memories 37, 38, and 39, and the image processing circuit 40 Is input to The image processing circuit 40 performs gamma correction processing, structure enhancement processing, color processing, and the like. These processing are performed in the observation mode by the observation mode identification signal from the observation mode switching circuit 45. appropriate image processing is performed in accordance with the 0
- the structure enhancement process is a process for enhancing the high-frequency components of an image, and a spatial filter such as an edge enhancement filter or an edge extraction filter is often used.
- a spatial filter such as an edge enhancement filter or an edge extraction filter is often used.
- the degree of structure enhancement required for diagnosis differs between observation of the fine structure of living tissue as in Fig. 1 and diagnosis of the presence of a lesion as in fluorescence observation.
- the observation mode identification signal input to the structure enhancement processing circuit 60 in the image processing circuit 40 is different depending on the observation mode by the address generation circuit 61 as shown in FIG.
- the value is converted to a filter value and input to the filter coefficient storage memory 62.
- the filter coefficient storage memory 62 has a combination of the address value and the filter coefficient stored in the address value area as many as the number of observation modes.
- Appropriate filter coefficients are output to the spatial filter processing circuit 63 according to the address value input from the generation circuit 61, and according to the observation mode.
- An image signal having undergone the structure enhancement process is output.
- the image signal output from the image processing circuit 40 is converted into an analog signal again by the D / A conversion circuits 41, 42, and 43, and displayed on the observation motor 4, and the DZA
- the outputs of the conversion circuits 41, 42, and 43 are encoded by the encoding circuit 44, and are recorded by the digital filing device 5 and the photographing device 7.
- the image under the selected observation mode is obtained from the image signal output from the color balance correction circuit 35 and the observation mode identification signal output from the observation mode switching circuit 45.
- a dimming signal for adjusting the illumination light aperture 11 of the light source device 1 is output so that the brightness becomes appropriate.
- the dimming signal is operated in a direction to open the illumination light aperture 11 when the light quantity is insufficient, and is operated in a direction to close the illumination light aperture 11 when the light quantity is excessive.
- the electronic shutter control circuit 50 is provided with an electronic shutter (not shown) for storing the electronic shutter speed in all observation modes corresponding to the scope 2 output from the scope information storage element 31. It has memory for speed storage. Based on the observation mode identification signal output from the observation mode switching circuit 45, an appropriate electronic shutter speed is read from a predetermined position of the electronic shutter speed storage memory, and based on the read electronic shutter speed, To generate and output electronic shutter control pulses.
- FIG. 9 is a diagram illustrating the timing relationship between the vertical planning pulse, the CDD accumulated charge, and the gate pulse for explaining the principle of the electronic shutter.
- the electronic shutter sweeps out unnecessary charges accumulated in the CCD at the timing set by the sweep pulse P0 and the signal read by the read pulse P1. It controls the charge accumulation time.
- the period from the rising of the sweep pulse P0 to the rising of the read pulse P1 is the charge accumulation time of the signal charge.
- the electronic shutter control signal is normally sent to the CCD driver 46 or the high-sensitivity CCD driver 47, and controls the charge accumulation time of the CCD 27 or the high-sensitivity CCD 28 via the relay switch 29.
- the electronic shutter control signal is normally sent to the CCD driver 46 or the high-sensitivity CCD driver 47, and controls the charge accumulation time of the CCD 27 or the high-sensitivity CCD 28 via the relay switch 29.
- the scope used for fluorescence observation has two diameters as shown in Fig. 1 because the diameter allowed for the scope varies depending on the site (lower digestive tract, upper digestive tract, bronchi, etc.) used.
- some scopes have only one CCD.
- the electronic shutter speed is adjusted according to the type of Scope 2 to capture the brightness.
- the electronic shirt speed may be the same for each color of the light in a plane-sequential manner, or may be changed for each color as shown in FIG.
- FIG. 10 shows an example of two scopes A and B having different electronic shutter speeds for each color.
- P 0R_A, P 0G_A, and P 0B_A are the sweep pulses in each of the R, G, and B periods of Scope A.
- P 1R_A, P 1G—A, and P IB-A are the R, G, and B periods of Scope A.
- P 0R_B, P 0G-B, P 0B—B are sweeping sweeps in each of R, G, and B periods of scope B
- P 1R_B, P 1G_B, P IB— B are R, G, and B read pulses in each period. Since the electronic shutter speed is determined by the time interval between the sweep pulse P0 and the read pulse P1 during one period of the vertical planning pulse, P0 and P1 function as electronic shutter speed control pulses. ing.
- the lamp drive circuit 7, motor 9, motor 13 and motor 14 of the light source device 1 respond to the observation mode based on the observation mode identification signal from the observation mode switching circuit 45. Output a control signal to perform the operation.
- the light source device 1 operates based on a control signal output from the light source control circuit 51 of the processor 3.
- Lamp drive circuit 7 Filters 21 a, 21 b, 21 c, 22 a, 22 b, 22 c used for rotary filter 12 having lamp drive current duty ratio storage element not shown Are produced with a certain degree of dispersion at the manufacturing stage. Therefore, the light source device 1 has an individual difference in the rotary filter 12, which means that the light source device 1 has an individual difference in the color balance.
- the lamp drive current duty ratio for changing the drive current of lamp 8 in two stages is measured in advance at the time of manufacture at the factory, and stored in the lamp drive current duty ratio storage element. Keep it.
- FIG. 11 is a diagram for explaining color balance variation correction by adjusting the lamp drive current duty ratio.
- the rotary filter 12 used in the present embodiment has a double structure, two types of lamp driving current duty ratios for the peripheral and outer circumferences are stored in advance for storing the lamp driving current duty ratio in the light source device 1. It is stored in the element.
- the light source control circuit 51 sets the duty ratio for the inner circumference to use the inner side of the rotary filter 12.
- the light source control circuit 51 instructs the lamp drive circuit 7 to use the outer peripheral side of the rotary filter 12 except for fluorescence observation. Select the utility ratio. Thereby, the amount of illumination light is controlled, and the individual difference of the color balance of the light source device 1 is corrected.
- the filter turret 10 has optical filters 17, 18, 19, 20 having different spectral characteristics for each observation mode, and receives light from the light source control circuit 51 based on the observation mode identification signal.
- the motor 9 is rotated by the control signal so that the optical filter corresponding to the selected observation mode moves on the optical path of the illumination light, and the motor 9 stops at a predetermined position. Bottom 10 is fixed.
- the illumination light that has passed through the optical filter of the filter turret 10 is adjusted by the illumination light aperture 11 to adjust the amount of illumination so as to have an appropriate brightness, and the rotary filter 12 that is driven to rotate by the motor 13
- the light is converted into light in a plane-sequential manner.
- the motor 13 has a different rotation frequency depending on the observation mode, and is driven at 10 Hz in the fluorescence observation mode and at 20 Hz in the other observation modes.
- the light source control circuit 51 communicates with each other so that the rotation frequency of the rotation filter 12 is synchronized with 1 OHz, while the other than fluorescence observation In this case, the light source control circuit 51 operates while communicating with each other so as to synchronize the rotation frequency of the same rotation filter 12 with 20 Hz.
- the motor 14 is vertically driven during fluorescence observation based on a signal from the light source control circuit 51 so that the inner peripheral side of the rotary filter 12 is positioned on the optical path of the illumination light. Then, based on the signal from the light source control circuit 51, the rotary filter 12 is vertically driven so that the outer peripheral side of the rotary filter 12 is on the optical path of the illumination light.
- the illumination light that has passed through the rotary filter 12 is condensed by the condenser lens 16 on the entrance surface of the light guide 15 of the scope 2 and irradiates the subject, and the return light is reflected by the CCD 27 Alternatively, images are taken by the high-sensitivity CCD 28.
- the endoscope is used in a frame sequential type. It may be used for a time-type endoscope.
- the scope 2 may be a fiberscope, and the signal processing device at that time is a type that processes an image signal detachably attached to an eyepiece of the fiberscope and captured by an imaging device using a solid-state imaging device. It may be acceptable.
- high-sensitivity CCD28 was used only for fluorescence observation, but it may be used for other observation modes.
- the scope 2 may be a scope equipped with one CCD as long as it supports special light observation, and the mounted CCD may be a normal CCD or a high-sensitivity CCD.
- the location of the observation mode switching switch 32 is not limited to the operation unit of the scope 2, but may be a button or a processor 3 provided on a front panel (not shown) of the light source device 1 or the processor 3. It may be a foot switch (not shown) or a keypad key connected to the device.
- observation mode switching switch 32 may be of a type having two or more observation modes. Further, the electronic shutter may be used for controlling the brightness in cooperation with the dimming circuit 49.
- the information in the processor 3 based on the information indicating the type of the scope 2 stored in the scope information storage device 31 is provided. It is also possible to use a format in which the settings for each scope, such as the priority ranking and the electronic shutter speed, stored in a memory (not shown) are read and used.
- the corresponding observation mode of the connected scope is switched in the order of priority, so that the scope does not select the non-compliant observation mode. Incorrect operation can be prevented.
- an image that has been appropriately processed according to the observation mode can be obtained according to the switching operation, so that there is no need to manually adjust settings, and switching between the observation modes is easy. Is possible You.
- the purpose is to not operate a switch that does not function effectively depending on the observation mode.
- FIG. 12 is an overall configuration diagram of an endoscope apparatus according to a second embodiment of the present invention.
- the processor 3 of the present embodiment includes an IHb pseudo color display processing circuit 64 at the subsequent stage of the synchronization memories 37, 38, and 39, and the image signal is supplied to the pre-processing circuit 33, / 0 Conversion circuit 34, color balance correction circuit 35, multiplexer 36, synchronization memory 37, 38, 39, IHb pseudo color display processing circuit 64, image processing circuit 40, D / A conversion circuit 4 It is configured to flow in the order of 1, 42, 43, CPU 44, observation mode switching circuit 45, normal CCD driver 46, high sensitivity CCD driver 47, CCD selector 48, It has a dimming circuit 49, an electronic shutter control circuit 50, a light source control circuit 51, an encoding circuit 52, and an IHb pseudo color processing control circuit 65.
- a keyboard 66 is connected to the processor 3, and an IHb pseudo color display switching key (not shown) for alternately turning on / off the IHb pseudo color display processing function is provided. ]
- the IHb pseudo-color display processing circuit 64 has a value (hereinafter, IHb) correlated with the amount of hemoglobin in blood from an endoscope image in normal light observation. b) is calculated, and pseudo-color data, which is pseudo-image data indicating the change of IH b, is created, combined with the original endoscopic image, and output. Since the change in IHb corresponds to the change in blood flow, it can be applied to discrimination between a diseased part and a normal part and determination of the degree of inflammation.
- IHb a value correlated with the amount of hemoglobin in blood from an endoscope image in normal light observation. b) is calculated, and pseudo-color data, which is pseudo-image data indicating the change of IH b, is created, combined with the original endoscopic image, and output. Since the change in IHb corresponds to the change in blood flow, it can be applied to discrimination between a diseased part and a normal part and determination of the degree of inflammation.
- the IHb pseudo color display processing circuit 64 calculates a value defined by the following equation.
- the image signal obtained by timing the R and G of the rotating filter 12 is the optical signal provided on the rotating filter 12 and the filter 10. Because the information is different from that of normal light observation due to the difference in the spectral characteristics of the filter, the value calculated by equation (1) also differs. Therefore, the operation of the IHb pseudo color display processing circuit 64 is not performed in the special light observation.
- the observation mode identification signal output from the observation mode switching circuit 45 is input to the IHb pseudo color processing control circuit 65.
- an IHb pseudo-color display switching key (not shown) provided on the keyboard 66, the switching signal to the IHb pseudo-color display is similarly transmitted to the IHb pseudo-color processing control circuit 65. Is input to
- the IHb pseudo color display processing circuit 64 is based on the expression (1). Outputs a signal that validates the operation. If one of the two input signals is missing, a signal that invalidates the IHb pseudo color display processing is output.
- the IHb pseudo-color display processing circuit 64 when a valid signal is received from the IHb pseudo-color processing control circuit 65, it is input from the synchronization memories 37, 38, and 39.
- the image signal is subjected to an operation based on the equation (1), the pseudo color data is combined with the image signal, and output to the image processing circuit 40.
- the signal is output to the image processing circuit 40 without processing the image signal input from the synchronization memories 37, 38, and 39.
- the observation mode is the special light observation
- a signal indicating that the processing is invalid is input to the IHb pseudo color display processing circuit 64 even if the IHb pseudo color display switching key is pressed.
- the processing is not performed, and the image signals input from the synchronization memories 37, 38, and 39 are output to the image processing circuit 40 as they are. Note that the IHb pseudo color display switching key switches between normal display and IHb pseudo color display alternately with each key operation.
- the processor 3 when the processor 3 is in the special light observation mode and the IHb pseudo color display switching key is pressed, the processor 3 also generates a warning sound to indicate that the IHb pseudo color display processing is invalid. Or, it has an unillustrated warning means for performing at least one of the warning displays on the screen.
- the subsequent operation is the same as in the first embodiment.
- the endoscope is used for a frame sequential type endoscope, but may be used for a simultaneous endoscope.
- Scope 2 may be a fiber corp.
- the signal processing device may be of a type that can be attached to and detached from the eyepiece of the fiberscope and that processes an image signal captured by an imaging device using a solid-state imaging device.
- the scope 2 may be a scope equipped with one CCD as long as it supports special light observation, and the mounted CCD may be a normal CCD or a high-sensitivity CCD. .
- the IHb pseudo color display processing was disabled.
- indocyanine green hereinafter referred to as “injection” injected into blood by intravenous injection was used.
- ICG indocyanine green
- injection injection
- ICG injection-induced CG
- the calculation result of equation (1) is diagnosed, as in the case of displaying the ICG concentration in a pseudo color to check blood flow and sentinel lymph nodes.
- the function of the IHb pseudo color display processing circuit 64 may be enabled even in the observation mode.
- the present invention is not limited to the IHb pseudo color display processing circuit 64.
- Switching to the IHb pseudo-color display is not limited to the keyboard key. Buttons provided on a front panel (not shown) of the light source device 1 or the processor 3 or a foot switch are provided. A switch provided on the operation section of the switch or scope may be used.
- the observation mode switching switch 32 may be of a type having two or more observation modes.
- the warning means may be not only a warning sound and a warning display on a screen, but also a notification by lighting of a light emitting means such as an LED.
- means for displaying usable functions on the screen in advance, and means for preventing malfunction such as notifying the available switching switches with LED lights may be added. You. Further, since the capacity stored in the scope information storage element 32 is limited, a not-shown message in the processor 3 is generated based on the information indicating the type of the scope 2 stored in the scope information storage element 31. The format using the settings for each scope stored in the memory may be used.
- FIG. 13 is an overall configuration diagram of an endoscope apparatus according to a third embodiment of the present invention.
- the third embodiment of the present invention is similar to the configurations of the first and second embodiments, and therefore, the description will focus on the differences from the first and second embodiments.
- the image signal is converted into a pre-process circuit 33, a / 0 conversion circuit 34, a color balance correction circuit 35, a multiplexer 36, a simultaneous memory 37, 38, 39. , An image processing circuit 40, and a D / A conversion circuit 41, 42, 43 in this order.
- a keyboard 67 is connected to the processor 3, and as shown in Fig. 14, normal light observation, fluorescence observation, infrared light observation, and narrow band observation are performed.
- Observation mode switching keys 68, 69, 70, and 71 are provided for directly switching to each light observation.
- the endoscope device when the power is turned on while the scope 2 is connected to the light source device 1 and the processor 3, the endoscope device is normally started in the light observation mode. Simultaneously with the activation, the observation mode information corresponding to the scope 2 is read out from the scope information storage element 31 of the scope 2 and stored in the CPU 44 in the processor 3.
- a keyboard 67 is connected to the processor 3 so that patient information and necessary comments can be input at the time of examination.
- the keyboard 67 has a key for alphabet input, a key for numeric input, etc., but since there is enough room to arrange keys, the processor 3
- observation mode switching keys are provided as the number of modes, the user can press the key of the observation mode he wants to use, thereby ignoring the priorities among the observation modes described in the first embodiment. Then, the user can directly switch to the selected observation mode.
- the observation mode switching signal is sent from the keyboard 67 to the observation mode switching circuit in the processor 3. 4 Entered in 5. Further, a signal indicating the type of the observation mode corresponding to the scope 2 is input from the CPU 44 to the observation mode switching circuit 45, and a signal (not shown) provided in the observation mode switching circuit 45. Stored in memory.
- the observation mode switching signal is compared with the type of the observation mode stored in the memory of the observation mode switching circuit 45, and if both match, the selection is made. It outputs the observation mode switching signal instructing to switch to the selected observation mode.
- observation mode switching signal On the other hand, if they do not match, output the observation mode switching signal.
- the current observation mode is maintained.
- a warning sound (not shown) alerts the user that the connected scope 2 is not compatible with the observation mode selected by the observation mode switching key on the keyboard 67.
- a warning is given to the user by using at least one of the above warning display and lighting of a light emitting means such as an LED.
- observation mode switching key on the keyboard 67 corresponds to the scope 2
- observation mode identification signal output from the observation mode switching circuit 45
- the CCD selector 48 in the processor 3 the color balance correction circuit 35, the synchronization memory 37, 38, 39, the image processing circuit 40, the dimming circuit 49, and the electronic shutter control circuit 50 ,
- the subsequent operation is the same as in the first embodiment.
- the endoscope is used for a frame sequential type, but it may be used for a simultaneous endoscope.
- the scope 2 may be a fiber scope
- the signal processing device may be of a type that is detachable from an eyepiece of the fiber scope and that processes an image signal captured by an imaging device using a solid-state imaging device. Shall be.
- the scope 2 may be a scope equipped with a single CCD as long as it supports special light observation, and the mounted CCD may be a normal CCD or a high-sensitivity CCD. I do.
- the switching operation by the keyboard operation described in the third embodiment is performed in accordance with the priority of the observation mode of the scope 2 with one switching switch described in the first embodiment. It can be used together with one that switches sequentially.
- the observation mode switching keys 68, 69, 70, and 71 are provided on the keyboard 67 because of the installation space, but if there is enough space, the scope 2 can be operated. Buttons, foot switches, and switches on the front panel (not shown) of the light source unit 1 and processor 3 A button on a mocon may be used.
- the capacity stored in the scope information storage element 31 is limited, it is not shown in the processor 3 based on the information indicating the type of the scope 2 stored in the scope information storage element 31. It may be a format that reads out the settings for each scope such as the priority order and electronic shutter speed stored in the memory and uses them.
- an endoscope apparatus corresponding to a plurality of observation modes, for example, a normal light observation and at least one special light observation, only a corresponding observation mode of a connected scope is selected. Since it is executed after being executed, malfunctions can be prevented, and there is no need to make settings for each test.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04746387A EP1637062A4 (en) | 2003-06-19 | 2004-06-18 | ENDOSCOPIC DEVICE |
CN200480017212.5A CN1809308B (zh) | 2003-06-19 | 2004-06-18 | 内窥镜装置 |
US11/305,643 US20060155166A1 (en) | 2003-06-19 | 2005-12-16 | Endoscope device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003175427A JP4009560B2 (ja) | 2003-06-19 | 2003-06-19 | 内視鏡装置及び信号処理装置 |
JP2003-175427 | 2003-06-19 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/305,643 Continuation US20060155166A1 (en) | 2003-06-19 | 2005-12-16 | Endoscope device |
Publications (1)
Publication Number | Publication Date |
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WO2004112591A1 true WO2004112591A1 (ja) | 2004-12-29 |
Family
ID=33534822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/008918 WO2004112591A1 (ja) | 2003-06-19 | 2004-06-18 | 内視鏡装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060155166A1 (ja) |
EP (1) | EP1637062A4 (ja) |
JP (1) | JP4009560B2 (ja) |
CN (1) | CN1809308B (ja) |
WO (1) | WO2004112591A1 (ja) |
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EP1859726A1 (en) * | 2005-03-18 | 2007-11-28 | Olympus Medical Systems Corp. | Endoscope, endoscope system, and switching circuit member for endoscope |
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Also Published As
Publication number | Publication date |
---|---|
CN1809308B (zh) | 2011-07-13 |
JP4009560B2 (ja) | 2007-11-14 |
CN1809308A (zh) | 2006-07-26 |
EP1637062A4 (en) | 2010-10-06 |
EP1637062A1 (en) | 2006-03-22 |
US20060155166A1 (en) | 2006-07-13 |
JP2005006974A (ja) | 2005-01-13 |
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