WO2012046530A1 - 診断システム - Google Patents
診断システム Download PDFInfo
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- WO2012046530A1 WO2012046530A1 PCT/JP2011/070216 JP2011070216W WO2012046530A1 WO 2012046530 A1 WO2012046530 A1 WO 2012046530A1 JP 2011070216 W JP2011070216 W JP 2011070216W WO 2012046530 A1 WO2012046530 A1 WO 2012046530A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0084—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
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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
- A61B1/06—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
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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
- A61B1/06—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
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0075—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
- A61B5/4222—Evaluating particular parts, e.g. particular organs
- A61B5/4238—Evaluating particular parts, e.g. particular organs stomach
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
- A61B5/4261—Evaluating exocrine secretion production
- A61B5/4283—Evaluating exocrine secretion production gastrointestinal secretions, e.g. bile production
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10024—Color image
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10068—Endoscopic image
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30092—Stomach; Gastric
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30096—Tumor; Lesion
Definitions
- the present invention relates to a diagnostic system that generates an index value that indicates an area likely to be a lesion in living tissue.
- an electronic endoscope having a function as a spectrometer has been proposed, such as that described in, for example, Japanese Patent Application Publication No. JP2007-135989A.
- an electronic endoscope it is possible to obtain spectral characteristics (distribution at each frequency of light absorptivity) of biological tissue such as the mucous membrane of a digestive organ such as the stomach or rectum.
- the spectral characteristics of substances are known to reflect information on the type and concentration of substances contained in the vicinity of the surface layer of the living tissue to be measured, and have been established as a discipline belonging to the analytical chemistry system .
- the spectral characteristic of the substance composed of the composite component is information obtained by superposing the spectral characteristic of the component substance constituting the composite substance.
- the living tissue of the healthy area may often contain a substance having a chemical structure which is hardly contained. Therefore, the spectral characteristics of the living tissue including the lesion area are different from the spectral characteristics of the living tissue of only the healthy region. As described above, since the spectral characteristics change between the healthy part and the lesioned part, it is possible to compare the spectral characteristics of the two and judge whether any lesioned part in the living tissue is included.
- an object of the present invention is to provide a diagnostic system that generates an index value that is useful in determining the area of a lesion of a living tissue.
- the diagnostic system of the present invention comprises spectral image capturing means for capturing spectral images of a predetermined target wavelength region in a body cavity to obtain spectral image data, and obtaining spectral image data to obtain the spectral images.
- An image processing unit that calculates an index value indicating an area likely to be a lesion from image data, and a monitor on which the index value is displayed, the image processing unit is configured to calculate each coordinate of the spectral image.
- the ratio of the cumulative value of the luminance values of all the spectral images of the target wavelength region to the luminance value of the spectral image of the specific wavelength band is calculated as an index value.
- the spectral characteristics of the lesioned part of the living tissue change in luminance value of a specific wavelength band compared to that of the healthy part.
- the spectrum obtained from the spectral image data has its total light amount level changed depending on the irradiation angle of the illumination light to the sample. Therefore, in the present invention, first, the cumulative value of the luminance values of the pixels of the spectral image is obtained, and the luminance value of the pixels is standardized based on the value.
- the ratio between the spectral intensity of the wavelength band of interest of the specific pixel and the accumulated luminance value of the luminance value of the specific pixel is determined, and the variation of the luminance value due to the illumination angle of the illumination light and the sample is corrected.
- the index value obtained by this method indicates the ratio of the spectral characteristics of a specific wavelength to the entire wavelength region. For example, a region where this ratio is large indicates that the luminance component of the wavelength region of interest is large, that is, the spectral characteristic change is more characteristic than other regions.
- the spectral change characteristic of the lesion is known, it is indicated that the region is a region to be noted as the lesion.
- the image processing means be configured to cause the monitor to display an index graph in which the index values are graphed.
- the image processing means combines color image data in the blue, green and red wavelength bands among the spectral image data to generate color image data, and the color image data and the index graph are displayed side by side on the monitor It is also possible to have a configuration that
- the particular wavelength band to be noted here is preferably a wavelength band whose maximum value is smaller than 550 nm to 590 nm which is the absorption wavelength band of hemoglobin.
- the specific wavelength band is, for example, 480 to 520 nm.
- FIG. 1 is a block diagram of a diagnostic system according to the embodiment of this invention.
- FIG. 2 is a graph showing spectra of a plurality of pixels in an image of gastric mucosa.
- FIG. 2 (a) is a graph showing an example of a spectrum of a healthy part of gastric mucosa
- FIG. 2 (b) is a graph showing an example of a spectrum of a lesion of gastric mucosa.
- FIG. 3 is a graph showing an example of the spectrum after performing the scaling process on the spectrum of FIG.
- FIG. 4 is a flowchart of a routine for displaying an index graph, which is executed by the spectral image processing unit of the diagnostic system according to the embodiment of this invention.
- FIG. 5 is an example of the index graph in the embodiment.
- FIG. 1 is a block diagram of a diagnosis system 1 of the present embodiment.
- the diagnostic system 1 of the present embodiment generates an index image to be referred to by a doctor when diagnosing a digestive disorder such as the stomach or intestine.
- the diagnostic system 1 includes an electronic endoscope 100, an electronic endoscope processor 200, and an image display device 300. Further, the electronic endoscope processor 200 incorporates a light source unit 400 and an image processing unit 500.
- the electronic endoscope 100 has an insertion tube 110 inserted into a body cavity, and an objective optical system 121 is provided at a distal end portion (insertion tube distal end portion) 111 of the insertion tube 110.
- An image of the living tissue T around the insertion tube distal end portion 111 by the objective optical system 121 forms an image on the light receiving surface of the imaging element 141 built in the insertion tube distal end portion 111.
- the imaging device 141 periodically (for example, every 1/30 seconds) outputs a video signal corresponding to the image formed on the light receiving surface.
- the video signal output from the imaging element 141 is sent to the image processing unit 500 of the electronic endoscope processor 200 via the cable 142.
- the image processing unit 500 includes an A / D conversion circuit 510, a temporary storage memory 520, a controller 530, a video memory 540, and a signal processing circuit 550.
- the A / D conversion circuit 510 A / D converts a video signal input from the imaging element 141 of the electronic endoscope 100 via the cable 142 and outputs digital image data.
- the digital image data output from the A / D conversion circuit 510 is sent to and stored in the temporary storage memory 520.
- the controller 530 processes any one or more image data stored in the temporary storage memory 520 to generate one display image data and sends it to the video memory 540.
- the controller 530 may be an image obtained by image computation of display image data generated from a single image data, display image data in which images of a plurality of image data are displayed side by side, or a plurality of image data.
- display image data or the like in which a graph obtained as a result of image calculation is displayed is generated and stored in the video memory 540.
- the signal processing circuit 550 converts the display image data stored in the video memory 540 into a video signal of a predetermined format (for example, NTSC format) and outputs it.
- the video signal output from the signal processing circuit 550 is input to the image display device 300.
- an endoscope image or the like captured by the electronic endoscope 100 is displayed on the image display device 300.
- the electronic endoscope 100 is provided with a light guide 131.
- the distal end 131a of the light guide 131 is disposed in the vicinity of the insertion tube distal end 111, while the proximal end 131b of the light guide 131 is connected to the electronic endoscope processor 200.
- the electronic endoscope processor 200 incorporates a light source unit 400 (described later) having a light source 430 or the like that generates white light with a large light quantity such as a xenon lamp, and the light generated by the light source unit 400 is a light The light is incident on the proximal end portion 131 b of the guide 131.
- the light incident on the proximal end 131 b of the light guide 131 is guided to the distal end 131 a through the light guide 131 and emitted from the distal end 131 a.
- a lens 132 is provided in the vicinity of the tip 131a of the light guide 131 of the insertion tube tip 111 of the electronic endoscope 100, and the light emitted from the tip 131a of the light guide 131 It penetrates and illuminates the living tissue T in the vicinity of the insertion tube tip 111.
- the electronic endoscope processor 200 has a function as a video processor for processing a video signal output from the image pickup device 141 of the electronic endoscope 100 and an electronic endoscope 100 in the vicinity of the insertion tip 111 of the electronic endoscope 100. It also has a function as a light source device for supplying illumination light for illuminating the living tissue T to the light guide 131 of the electronic endoscope 100.
- the light source unit 400 of the electronic endoscope processor 200 includes a light source 430, a collimator lens 440, a spectral filter 410, a filter control unit 420, and a condenser lens 450.
- the white light emitted from the light source 430 is collimated by the collimator lens 440, passes through the spectral filter 410, and then enters the proximal end 131 b of the light guide 131 by the condenser lens 450.
- the spectral filter 410 is a disk-type filter that splits white light incident from the light source 430 into light of a predetermined wavelength (that is, wavelength selection), and 400, 405, 410,.
- the rotation angle of the spectral filter 410 is controlled by the filter control unit 420 connected to the controller 530, and the controller 530 controls the rotation angle of the spectral filter 410 via the filter control unit 420 to obtain a predetermined wavelength.
- Light enters the proximal end 131 b of the light guide 131 and illuminates the living tissue T in the vicinity of the insertion tube distal end 111. Then, the light reflected by the living tissue T forms an image on the light receiving surface of the imaging element 141 as described above, and a video signal is sent to the image processing unit 500 via the cable 142.
- the image processing unit 500 is a device that obtains a plurality of spectral images in 5 nm wavelength increments from the image of the living tissue T obtained through the cable 142. Specifically, when the spectral filter 410 selects and outputs narrow band light (having a bandwidth of about 5 nm) of central wavelengths 400, 405, 410,. Obtain a spectral image.
- the image processing unit 500 has a function of processing a plurality of spectral images generated by the spectral filter 410 and generating an image such as a color image or an index graph indicating the position of a lesion as described later. Then, the image processing unit 500 causes the image display device 300 to display the processed spectral image.
- spectral filter 410 for example, a Fabry-Perot filter or a filter using a transmission diffraction grating can be used.
- the image processing unit 500 has a function of generating an index graph indicating the position of a region likely to be a lesion, using a plurality of spectral images of different wavelengths.
- the index graph generation function will be described below.
- FIG. 2 is a graph showing spectra of a plurality of pixels in an image of gastric mucosa.
- FIG. 2 (a) shows the spectrum of the pixel corresponding to the healthy part of the gastric mucosa
- FIG. 2 (b) shows the spectrum of the pixel corresponding to the lesion of the gastric mucosa. is there.
- the spectrum of the gastric mucosa image has a large peak (first peak) at a wavelength of 600 to 700 nm and a wavelength of 500 nm regardless of whether it is a healthy part or a lesion part. With a small peak (second peak).
- the spectrum of each pixel of the healthy part and the lesion part is confirmed to have almost similar characteristics, but when measurement is performed at a plurality of points distributed in two dimensions
- the amount of light effective for measurement differs from point to point due to the difference between the angle of the illumination light and the subject and the distance from the insertion tube tip 111 (FIG. 1) of the electronic endoscope 100.
- the respective spectra shown in FIG. 2 are replaced with the information of relative intensity for each wavelength regardless of the luminance value, and a standardization process is performed to compare and consider.
- the standardization process is performed according to the following procedure. Note that the scaling process described below is to obtain a coefficient when scaling other pixels with reference to a pixel having the largest maximum brightness among a plurality of pixels serving as a sample.
- n is a sample number, and here indicates the two-dimensional spectral intensity of each point.
- Each of the pixels is a mixture of pixels of a healthy part and pixels of a lesion.
- the maximum value of O n (lambda) is find the most larger specimens N.
- Kn satisfying Equation 1 below is determined.
- K indicates a coefficient group which is optimized by calculating the light amount difference at each point.
- calculation in normal reflection intensity is also applicable.
- FIG. 3 A spectrum obtained by scaling the spectrum shown in FIG. 2 by the above procedure is shown in FIG.
- the solid line in FIG. 3 shows the normalized spectrum of the pixel corresponding to the healthy region of the gastric mucosa
- the dotted line shows the normalized spectrum of the pixel corresponding to the lesion of the gastric mucosa.
- the level of the valley (in the vicinity of a wavelength of 550 nm) between the first peak and the second peak is slightly higher in the pixels of the healthy area than in the pixels of the lesion area. That is, in the band of wavelengths 480 to 590 nm, the pixels of the healthy part are larger than the pixels of the lesioned part, and the two-dimensional extraction of the spectral level difference of the band centered on 480 to 590 nm I understand that it is.
- the band of wavelengths 550 to 590 nm is known to be the absorption wavelength band of hemoglobin.
- a band whose maximum wavelength is smaller than the absorption wavelength band of hemoglobin described above for example, a band near the wavelength 500 nm (480 to 520 nm, etc.) is used as a new marker indicating a lesion.
- the diagnostic system 1 of the present embodiment uses the level of the wavelength band centered on 480 to 520 nm as a marker for indicating a lesion, and generates an index graph indicating the position of a region likely to be a lesion. doing. And thereby, in spectral characteristic information in which characteristic changes of all disease parts are included, diagnosis support information can be provided based on the information.
- the scaling process is simplified to obtain the index value in a very short time.
- the contribution of the average value of the luminance value of each pixel of the endoscopic image is dominated by the component around the first peak, and the contribution rate of the component around the second peak is low . Therefore, the data obtained by calculating the ratio of the luminance value around the second peak to the cumulative value of the luminance value of each pixel of the endoscopic image obtained from the spectral image for each pixel is the above-mentioned (each Like the luminance value near the wavelength 500 nm of the spectrum for which the luminance value of the pixel is multiplied by Kn), it functions as an index indicating the position of a region likely to be a lesion.
- data obtained by dividing the cumulative value of the luminance values of each pixel by the luminance value around the second peak is used as an index indicating the position of the area having a high possibility of being a lesion. That is, based on the spectral image, the luminance value O I (x, y, ⁇ ) of the pixel at the coordinate (x, y) is calculated based on Equation 2, and the index value O O at the coordinate (x, y) Find (x, y).
- ma and mb are natural numbers such that ma ⁇ mb, and are appropriately selected such that the wavelength bands ⁇ ma to ⁇ mb are included in the wavelength band around the second peak.
- M is defined O O (x, y) so that falls within an appropriate range (e.g., between 0 and 1) (i.e., O O (x, y) so that the maximum value is appropriately sized) appropriate It is a coefficient.
- O O (x, y) obtained by Equation 2 is a value obtained by dividing the cumulative value of the luminance of each pixel of the endoscopic image by the luminance value around the second peak.
- the obtained coordinates (x, y) having a large O O (x, y) are estimated to be regions that are likely to be a lesion.
- FIG. 4 is a flowchart of a routine for generating an index graph and displaying the image on the image display device 300, which is executed by the image processing unit 500 of the present embodiment. This routine is executed when the image processing unit 500 is powered on.
- step S1 the image processing unit 500 displays a message prompting the user to input the lower limit ⁇ ma and the upper limit ⁇ mb of the wavelength band to be compared with the cumulative value of luminance values (the numerator of the right side of equation 2) when creating the index graph. While displaying on the device 300, the input of ⁇ ma and ⁇ mb is accepted. When ⁇ ma and ⁇ mb are input by an input unit (keyboard or the like) (not shown) of the image processing unit 500, the process proceeds to step S2.
- step S2 the image processing unit 500 sends a control signal for causing the filter control unit 400 to acquire a spectral image.
- the filter control unit 400 controls the rotation angle of the spectral filter 410 to sequentially select the narrow band light of 400 nm, 405, 410, ..., 800 nm (bandwidth about 5 nm).
- the image processing unit 500 captures a spectral image obtained at each wavelength and records the spectral image in the temporary storage memory 520.
- step S3 the process proceeds to step S3.
- step S3 three images with center wavelengths of 435 nm, 545 nm, and 700 nm are taken out of the spectral images acquired in step S2, and an image with a center wavelength of 435 nm is a blue plane and an image with a center wavelength of 545 nm.
- an image with a center wavelength of 435 nm is a blue plane and an image with a center wavelength of 545 nm.
- This color image data is obtained from the spectral image of 435 nm, which is the blue wavelength, the spectral image of 545 nm, which is the green wavelength, and the spectral image of 700 nm, which is the red wavelength, as described above. It becomes a color image equivalent to the endoscopic image.
- the image processing unit 500 sends the generated color image data to the video memory 540 and displays it on the left side of the screen of the image display device 300. Then, it progresses to step S4.
- step S4 while step S2 or S3 is being performed, the input means of the image processing unit 500 is operated to confirm whether or not a trigger input instructing generation of an index graph has occurred. If a trigger input has not occurred (S4: NO), the process proceeds to step S2, and acquisition of a spectral image is performed again. That is, as long as there is no trigger input, the color image obtained from the spectral image is successively updated and continuously displayed on the image display device 300. On the other hand, if a trigger input is generated while steps S2 to S3 are being executed (S4: YES), the process proceeds to step S5.
- step S5 an index value is created using Eq. 2 from ⁇ ma and ⁇ mb inputted in step S1 and the spectral image acquired in step S2. Then, it progresses to step S6.
- step S6 an index graph obtained by graphing the index value created in step S5 is displayed on the right side of the screen of the image display device 300.
- the color image of the endoscopic image and the index graph are arranged side by side on the screen of the image display device 300, and the user of the diagnostic system 1 compares the color image with the index graph. It is possible to determine which region in the color image is a lesion. Then, it progresses to step S7.
- step S7 the image processing unit 500 causes the image display device 300 to display a message inquiring as to whether or not to create the index graph again, and receives an input from the input unit.
- the process returns to step S1.
- the re-creation of the index graph is not instructed for a predetermined time (for example, several seconds) (S7: NO)
- the process proceeds to step S8.
- step S8 the image processing unit 500 causes the image display apparatus 300 to display a message inquiring as to whether or not the display of the index graph is to be ended, and accepts an input from the input unit.
- the user of the diagnostic system 1 operates the input means and selects to end the display of the index graph (S8: YES)
- this routine is ended.
- display of the index graph is not instructed for a predetermined time (for example, several seconds) (S8: NO)
- the process proceeds to step S7.
- the index graph referred to when estimating the position of the lesion area is displayed together with the color image of the endoscopic image. It is displayed on the device 300.
- the user of the diagnostic system 1 manually inputs the wavelength range ( ⁇ ma , ⁇ mb ) that functions as a marker of a lesion.
- a wavelength range functioning as a marker of a lesion site may be a fixed value (for example, 480 nm to 520 nm or 500 nm).
- the cumulative value of the luminance value of each pixel and the luminance value around the second peak are obtained from spectral images of different wavelengths, and used as an index indicating the position of a region likely to be a lesion.
- the numerator (number of cumulative values of luminance values of each pixel) part of the number 2 does not require spectral image data of a specific wavelength, and calculation is possible if there is luminance information for a fixed monochrome image. is there. Therefore, instead of the process of obtaining the total value of the luminance value of each pixel, for example, after the spectral filter 140 is retracted, the luminance value of each pixel by white light may be determined.
- R (red) is used in place of the usual R (red) -G (green) -G (green) -B (blue) Bayer arrangement filter. Even if a color filter of Bayer arrangement of -GY (Gray)-G (Green)-B (Blue) is arranged and the spectral filter 140 is retracted, the luminance information obtained by the GY (Gray) filter is used. Good. With such a configuration, it is not necessary to obtain the total value of the luminance values of the respective pixels from spectral images of different wavelengths, and it becomes possible to easily and quickly carry out the arithmetic processing of Equation 2.
- FIG. 5 is an index graph in which an index value O o (x, y) obtained by processing a spectral image of an endoscopic image by the diagnostic system 1 of the present embodiment is mapped. Note that hit the obtain an index value O O (x, y), ⁇ ma and lambda mb in Formula 2 is set to 500 nm.
- the index graph is shown as a contour map, and the region where the index value O o (x, y) is high (that is, likely to be a lesion) is , Light in density (ie, close to white) and high on the contour map. Therefore, the position of the lesion can be estimated from the index graph.
- the present invention is not limited to the above configuration.
- the position of the lesion is indicated simply by shading (that is, a diagram in which the brightness of coordinates (x, y) is proportional to O 0 (x, y) is used as an index graph) or an index graph is displayed
- the present invention also includes a configuration in which a mark such as a frame is superimposed on an area where the value of O o (x, y) exceeds a predetermined threshold in a color image displayed on the image display device 300 without being displayed.
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Abstract
Description
Claims (5)
- 体腔内の所定波長領域の分光画像を撮影して分光画像データを得る分光画像撮影手段と、
前記分光画像データを取得し、該分光画像データから、病変部である可能性が高い領域を示す指標値を演算する画像処理手段と、
前記指標値が表示されるモニタと、
を有し、
前記画像処理手段は、前記分光画像の各座標について、前記所定波長領域の全ての分光画像の輝度値の累計値と特定の波長帯域の分光画像の輝度値の比率を、前記指標値として演算することを特徴とする診断システム。 - 前記画像処理手段は、前記指標値をグラフ化した指標グラフを前記モニタに表示させることを特徴とする請求項1に記載の診断システム。
- 前記画像処理手段は、前記分光画像データのうち、青色、緑色、赤色の波長帯域のものを合成してカラー画像データを生成し、
前記モニタには、前記カラー画像データと前記指標グラフとが並べられて表示される
ことを特徴とする請求項2に記載の診断システム。 - 前記特定の波長帯域は、ヘモグロビンの吸収波長帯域である550nm~590nmよりも最大値が小さい波長帯域であることを特徴とする請求項1から請求項3のいずれか一項に記載の診断システム。
- 前記特定の波長帯域は、480~520nmであることを特徴とする請求項4に記載の診断システム。
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US13/877,979 US9468381B2 (en) | 2010-10-07 | 2011-09-06 | Diagnostic system |
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JP6257926B2 (ja) * | 2013-05-31 | 2018-01-10 | Hoya株式会社 | 波長可変光バンドパスフィルタモジュール、波長可変光源装置及び分光内視鏡装置 |
JP6707533B2 (ja) | 2015-05-21 | 2020-06-10 | オリンパス株式会社 | 画像処理装置、画像処理方法、及び画像処理プログラム |
EP3533382A4 (en) | 2016-10-27 | 2019-12-04 | Fujifilm Corporation | ENDOSCOPIC SYSTEM |
JP6968357B2 (ja) * | 2017-03-24 | 2021-11-17 | 株式会社Screenホールディングス | 画像取得方法および画像取得装置 |
JP6960773B2 (ja) * | 2017-05-26 | 2021-11-05 | 池上通信機株式会社 | 撮像画像処理システム |
KR102393661B1 (ko) * | 2017-12-22 | 2022-05-02 | 한국전기연구원 | 다중 영상 내시경 시스템, 그 영상 제공 방법, 및 상기 방법을 실행시키기 위한 컴퓨터 판독 가능한 프로그램을 기록한 기록 매체 |
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CN103167822B (zh) | 2016-09-07 |
GB2498491A (en) | 2013-07-17 |
US20130197371A1 (en) | 2013-08-01 |
JP5737899B2 (ja) | 2015-06-17 |
GB201308158D0 (en) | 2013-06-12 |
DE112011103387B4 (de) | 2017-03-09 |
US9468381B2 (en) | 2016-10-18 |
DE112011103387T5 (de) | 2013-10-24 |
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JP2012080939A (ja) | 2012-04-26 |
CN103167822A (zh) | 2013-06-19 |
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