摘要:
An optical system for fluorescence observation comprises optics including an ocular 17, a camera 55, a display 69, a light source 71, an illumination light filter 84, an observation light filter 57 and a controller 35. The observation filter has multiple transmitting regions which allows light which was generated by a fluorescence to traverse for observation. The transmitting ranges are divided by blocking ranges. At the wavelength ranges at which the observation filter has a transmitting region the illumination filter has a blocking region and the other way round. The multiple transmitting regions of the illumination filter enable an improved color impression under normal light observation.The controller is configured to process a fluorescent light image obtained by the camera by identifying a contiguous fluorescent region in the fluorescent light image, generating an image including a representation of the boundary of the contiguous fluorescent region, and supplying the generated image to the display.
摘要:
The invention relates to a computer-implemented method (10) for determining the blood volume flow (IBI) through a portion (90i, i=1, 2, 3, . . . ) of a blood vessel (88) in an operating region (36) using a fluorophore. A plurality of images (801, 802, 803, 804, . . . ) are provided, which are based on fluorescent light in the form of light having wavelengths lying within a fluorescence spectrum of the fluorophore, and which show the portion (90i) of the blood vessel (88) at different recording times (t1, t2, t3, t4, . . . ). By processing at least one of the provided images (801, 802, 803, 804, . . . ), a diameter (D) and a length (L) of the portion (90i) of the blood vessel (88) and also a time interval for a propagation of the fluorophore through the portion (90i) of the blood vessel (88) are determined, which time interval describes a characteristic transit time (τ) for the fluorophore in the portion (90i) of the blood vessel (88), in which a blood vessel model (MBQ) for the portion (90i) of the blood vessel (88) is specified, which blood vessel model describes the portion (90i) of the blood vessel (88) as a flow channel (94) having a length (L), having a wall (95) with a wall thickness (d), and having a free cross section Q. A fluid flow model MFQ for the blood vessel model (MBQ) is assumed, which fluid flow model describes a local flow velocity (122) at different positions over the free cross section Q of the flow channel (94) in the blood vessel model (MBQ), and a fluorescent light model MLQ is assumed, which describes a spatial probability density for the intensity of the remitted light at different positions over the free cross section Q of the flow channel (94) in the blood vessel model (MBQ), which light is emitted by a fluid, which is mixed with fluorophore and flows through the free cross section Q of the flow channel (94) in the blood vessel model (MBQ), when said fluid is irradiated with fluorescence excitation light. The blood volume flow (IBI) is determined as a fluid flow guided through the flow channel (94) in the blood vessel model (MBQ), which fluid flow is calculated from the length (L) and the diameter (D) of the portion (90i) of the blood vessel (88) and from the characteristic transit time (τ) for the fluorophore in the portion (90i) of the blood vessel (88), using the fluid flow model MFQ and the fluorescent light model MLQ.
摘要:
An endoscopic probe is made available. Said endoscopic probe comprises: a handle with a front end a rear end with a rear end axis and, extending between the front end and the rear end, a straight grip portion with a grip portion axis; a shaft extending from the front end of the handle and having a shaft axis, and a cable issuing from the rear end, wherein the shaft axis, the rear end axis and the grip portion axis lie within a common plane, the shaft axis encloses an angle in the range of 100 to 140 degrees with the grip portion axis, the grip portion axis encloses an angle in the range of 110 to 130 degrees with the rear end axis, the shaft axis encloses an angle in the range of 30 to 90 degrees with the rear end axis.
摘要:
An optical filter system for florescence observation comprises an illumination light filter (I) and an observation light filter (O). The observation light filter has plural transmitting regions (D1O,D2O) allowing fluorescent light to traverse the observation light filter. Blocking regions (S0O,S1O) separate the transmitting regions. The illumination light filter has transmitting regions (D0I,D1I) where the observation light filter has a corresponding blocking region. The illumination light filter has blocking regions (S1I,S2I) where the observation light filter has a corresponding transmitting region. The plural transmitting regions of the illumination light filter hallow for an improved color impression in the normal light observation.
摘要:
The invention relates to a method for providing an image representation by means of a surgical microscope, comprising obtaining or capturing at least one application parameter, capturing a color image representation of a capture region by means of a camera, capturing a fluorescence image representation of the capture region by means of a fluorescence camera, processing the fluorescence image representation by means of a processing device to optimize it for an overlay with the color image representation, wherein a type of processing is defined based on the at least one application parameter, overlaying the color image representation with the processed fluorescence image representation, and providing an image signal that encodes the overlaid image representation. The invention further relates to a surgical microscope.
摘要:
Embodiments relate to an ophthalmology microscopy-system and a method of operating an ophthalmology microscopy-system which allow for an at least partial or full removal of liquids and gels used in ophthalmology for application in an eye of a patient in an particularly efficient way. Further embodiments relate to a product such as a liquid or a gel usable for an application in an eye of a patient, wherein the product has a high transmittance and, nevertheless, may be made visible particularly well.
摘要:
A set of filters for fluorescence observation comprises an illumination light filter and an observation light filter, wherein the following is holds: ∫ S T L ( r -> ) · T O ( r -> ) · r -> · r ∫ S T L ( r -> ) · T O ( r -> ) · r = R -> and ( 3 ) W -> - R -> ≤ 0.2 ; ( 4 ) wherein: λ designates the wavelength, TL(λ) is the transmission characteristic of the illumination light filter, TO(λ) is the transmission characteristic of the observation light filter, and A1, A2 are numbers between 0 and 1, {right arrow over (r)} is a coordinate in the CIE xy chromaticity diagram of the CIE 1931 XYZ color space, S is a line called the spectral locus in the CIE xy chromaticity diagram of the CIE 1931 XYZ color space, and {right arrow over (W)} is the white point in the CIE xy chromaticity diagram of the CIE 1931 XYZ color space.