Endoscopic or fiberscopic imaging device using infrared fluorescence
First Claim
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1. An angiography device for inspecting a wall of a body cavity of a patient after the patient has been intravenously injected with a pharmaceutically acceptable dye, the dye being capable of emitting fluorescent light when excited by light having wavelengths which excite the dye, the device comprising:
- a flexible duct of small section and having a free end for inserting in a body cavity to inspect a wall thereof;
excitation means for emitting light from said free end in a first range of wavelengths including wavelengths which excite the dye;
reception means for receiving, at said free end, a sensed image of an observed wall in a second wavelength range which includes wavelengths of fluorescent light emitted from the dye and which has substantially no overlap with the first wavelength range; and
display means for displaying the received image;
wherein the first wavelength range lies, at least in part, between about 766 nm and about 815 nm, and in which the second wavelength range lies, at least in part, between about 825 nm and about 840 nm; and
wherein the reception means comprise a digital sensor for directly transforming the sensed image into digital signals, and digital processing means for increasing definition, contrast, and brightness in the sensed image.
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Abstract
An angiography device including an endoscope designed to be inserted into a body cavity, a light source for emitting excitation light in a first wavelength range into the cavity, a digital camera for sensing an image of the body cavity in a second wave range that does not overlap the first wavelength range, and a screen for displaying the sense image, the first and second wavelength ranges lying in the infrared range.
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13 Claims
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1. An angiography device for inspecting a wall of a body cavity of a patient after the patient has been intravenously injected with a pharmaceutically acceptable dye, the dye being capable of emitting fluorescent light when excited by light having wavelengths which excite the dye, the device comprising:
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a flexible duct of small section and having a free end for inserting in a body cavity to inspect a wall thereof;
excitation means for emitting light from said free end in a first range of wavelengths including wavelengths which excite the dye;
reception means for receiving, at said free end, a sensed image of an observed wall in a second wavelength range which includes wavelengths of fluorescent light emitted from the dye and which has substantially no overlap with the first wavelength range; and
display means for displaying the received image;
wherein the first wavelength range lies, at least in part, between about 766 nm and about 815 nm, and in which the second wavelength range lies, at least in part, between about 825 nm and about 840 nm; and
wherein the reception means comprise a digital sensor for directly transforming the sensed image into digital signals, and digital processing means for increasing definition, contrast, and brightness in the sensed image.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification