Image processing device for fluorescence observation
First Claim
1. An image processing device for fluorescence observation comprising:
- a changeover filter located in an optical path of a light beam generated by a light source device and impinging on body tissue, said light beam including a spectra from an infrared wavelength band to a visible light band, said changeover filter alters said light beam into illumination light or excitation light;
an image synthesizing section that generates a synthesized image by synthesizing an image signal of a reflected light image sensed by an image pickup element and obtained by illuminating body tissue with said illumination light and an image signal of a fluorescent image sensed by said image pickup element and obtained by illuminating said body tissue with said excitation light, wherein said body tissue is sequentially and non-concurrently illuminated by said illumination light and said excitation light; and
a gain adjustment section that adjusts a gain of said image signal of said reflected light image and/or said image signal of said fluorescent image such that a boundary of hues of normal tissue and diseased tissue found using optical characteristics of said normal tissue and said diseased tissue is included in a predetermined range with respect to a prescribed standard chromaticity diagram, depending on whether said body tissue that is represented in said synthesized image generated by said image synthesizing section is normal tissue or diseased tissue.
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Abstract
An image processing device having a very straightforward construction, for obtaining an image in which normal tissue and diseased tissue are easy to identify, comprises: an image synthesizing section that generates a synthesized image by synthesizing an image signal of reflected light image produced by illumination light obtained by illuminating body tissue with illumination light and an image signal of a fluorescent image obtained by illuminating the body tissue with excitation light; and a gain adjustment section that adjusts the gain of the image signal of the reflected light image and/or the image signal of the fluorescent image such that the boundary of the hues of the normal tissue and diseased tissue found from the optical characteristics of the respective tissues is contained in a predetermined range with respect to a prescribed standard chromaticity diagram, depending on whether the body tissue that is displayed on the synthesized image generated by the image synthesizing section is normal tissue or diseased tissue.
57 Citations
35 Claims
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1. An image processing device for fluorescence observation comprising:
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a changeover filter located in an optical path of a light beam generated by a light source device and impinging on body tissue, said light beam including a spectra from an infrared wavelength band to a visible light band, said changeover filter alters said light beam into illumination light or excitation light; an image synthesizing section that generates a synthesized image by synthesizing an image signal of a reflected light image sensed by an image pickup element and obtained by illuminating body tissue with said illumination light and an image signal of a fluorescent image sensed by said image pickup element and obtained by illuminating said body tissue with said excitation light, wherein said body tissue is sequentially and non-concurrently illuminated by said illumination light and said excitation light; and a gain adjustment section that adjusts a gain of said image signal of said reflected light image and/or said image signal of said fluorescent image such that a boundary of hues of normal tissue and diseased tissue found using optical characteristics of said normal tissue and said diseased tissue is included in a predetermined range with respect to a prescribed standard chromaticity diagram, depending on whether said body tissue that is represented in said synthesized image generated by said image synthesizing section is normal tissue or diseased tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 24, 25, 26, 27, 32)
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11. An image processing device for fluorescence observation comprising:
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a changeover filter located in an optical path of a light beam generated by a light source device and impinging on body tissue, said light beam including a spectra from an infrared wavelength band to a visible light band, said changeover filter alters said light beam into illumination light or excitation light; image synthesizing means that generates a synthesized image by synthesizing an image signal of a reflected light image sensed by an image pickup element and obtained by illuminating body tissue with said illumination light and an image signal of a fluorescent image sensed by said image pickup element and obtained by illuminating said body tissue with said excitation light, wherein said body tissue is sequentially and non-concurrently illuminated by said illumination light and said excitation light; and gain adjustment means that adjusts a gain of said image signal of said reflected light image and/or said image signal of said fluorescent image such that a boundary of hues of normal tissue and diseased tissue found using optical characteristics of said normal tissue and said diseased tissue is included in a predetermined range with respect to a prescribed standard chromaticity diagram, depending on whether said body tissue that is represented in said synthesized image generated by said image synthesizing section is normal tissue or diseased tissue. - View Dependent Claims (12, 13, 14, 33)
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15. An image processing device for fluorescence observation comprising:
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a light source device that emits a light beam comprising illumination light including two different wavelength bands, a wavelength band including an optical absorption band of hemoglobin and another wavelength band including an optical non-absorption band of hemoglobin, and excitation light in yet another wavelength band for exciting fluorescence; a changeover filter located in an optical oath of said light beam, wherein said changeover filter alters said light beam into illumination light or excitation light; an image pickup section that comprises an image pickup element that picks up respectively two reflected light images produced by reflected light obtained by reflection after illuminating body tissue with said illumination light of said two different wavelength bands from said light source device and a fluorescent image produced by fluorescence excited by illuminating body tissue with said excitation light from said light source device wherein said body tissue is sequentially and non-concurrently illuminated by said illumination light and said excitation light; and an image processing section that generates a processed image by signal processing of image signals of said two reflected light images obtained by said image pickup section and an image signal of said fluorescent image; wherein said image processing section comprises; a signal input section that inputs thee image signals consisting of said image signals of said two reflected light images picked up by said image pickup section and said image signal of said fluorescent image; an image synthesizing section that generates a synthesized image by image synthesis of said image signals of said two reflected light images and said fluorescent image signal, wherein one of said image signals of said two reflected light images is an image signal of said wavelength band including said optical absorption band of hemoglobin, and wherein the other of said image signals of said two reflected light images is an image signal of said wavelength band including said optical non-absorption band of hemoglobin; and a gain adjustment section that adjusts a gain of at least one of said image signals of said two reflected light images and said fluorescent image signal that are input by said signal input section such that a boundary of hues of normal tissue and diseased tissue represented in said synthesized image synthesized by said image synthesis section is included in a range defined by the four points (0.21, 0.53), (0.18, 0.50), (0.23, 0.44) and (0.25, 0,49) with respect to the CUB 1976 UCS chromatic city diagram. - View Dependent Claims (16, 17, 18, 34)
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19. An image processing device for fluorescence observation comprising:
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a light source device that emits a light beam comprising illumination light including two different wavelength bands, a wavelength band including an optical absorption band of hemoglobin and another wavelength band including an optical non-absorption band of hemoglobin, and excitation light in yet another wavelength band for exciting fluorescence; a changeover filter located in an optical path of said light beam, wherein said changeover filter alters said light beam into illumination light or excitation light; an image pickup section comprises an image pickup that element that picks up respectively two reflected light images produced by reflected light obtained by reflection after illuminating body tissue with illumination light of said two different wavelength bands from said light source device and a fluorescent image produced by fluorescence excited by illuminating said body tissue with said excitation light from said light source device, wherein said body tissue is sequentially and non-concurrently illuminated by said illumination light and said excitation light; and an image processing section that generates a processed image by signal processing of image signals of said two reflected light images obtained by said image pickup section and an image signal of said fluorescent image; wherein said image processing section comprises; signal input means that inputs three image signals consisting of said image signals of said two reflected light images picked up by said image pickup section and said image signal of said fluorescent image; image synthesizing means that generates a synthesized image by image synthesis of said image signals of said two reflected light images and said fluorescent image signal, wherein one of said image signals of said two reflected light images is an image signal of said wavelength band including said optical absorption band of hemoglobin, and wherein the other of said image signals of said two reflected light images is an image signal of said wavelength band including said optical non-absorption band of hemoglobin; and gain adjustment means that adjusts a gain of said three image signals that are input by the signal input means such that a boundary of hues of normal tissue and diseased tissue represented in said synthesized image synthesized by said image synthesis section is included in a range defined by the four points (0.21, 0.53), (0.18, 0.50), (0.23, 0.44) and (0.25, 0.49) with respect to the CIE 1976 UCS chromaticity diagram. - View Dependent Claims (20, 21, 22, 23, 28, 29, 30, 31, 35)
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Specification