摘要:
A laser cyclo-photocoagulation in the eye is monitored on-line by means of an ultrasonic biomicroscope, i.e., visual representations of the treated field, inclusive of the effects obtained in the tissue, are provided continuously on a display placed at the disposal of the attending doctor. The doctor decides, by means of the generated ultrasonic images, on the course of the further treatment. The choice is possible between different operating modes of the ultrasonic biomicroscope.
摘要:
A method is disclosed for fixing at least one location in an examination field (9) with respect to a coordinate system (13). The method includes determining, in response to a request (65), coordinates of a first location (59) as a first coordinate set (x, y, z) allocated to the first location (59). A first recording and a second recording of topological data (69) in a spatially extended area around the first location (59) in the examination field (9) are obtained. The first and second recordings are compared to determine a displacement (&Dgr;x, &Dgr;y, &Dgr;z) of the first location (59) of the examination field (9) with respect to the coordinate system (13), the coordinates of the first coordinate set (x, y, z) allocated to the first location (59) are changed dependent upon the determined displacement (&Dgr;x, &Dgr;y, &Dgr;z) such that the changed coordinates substantially correspond to the coordinates of the first location (59) in the examination field (9) after the displacement thereof.
摘要:
A laser adapter 2 for mounting on a surgical microscope 4 includes a compactly configured laser 9 which supplies a therapeutic laser beam 10 at a suitable wavelength. In addition, a pulse energy monitoring device is provided in the laser adapter 4 which is used for the on-line energy measurement of the emitted laser pulses and whose output signals are applied as parameters for controlling the pulse energy emitted by the laser 9.
摘要:
For defined ablation of a surface, successive partial regions of equal surface area are acted on by a radiation source, preferably a laser, through an optical system. The partial regions are smaller as regards surface area than the whole surface to be processed, so that the respective radiation source can be dimensioned in a less costly manner. Telescope optics with conical surfaces serve as optical systems suitable for this purpose.
摘要:
An applicator for treatment of an elevated internal ocular pressure by means of laser radiation has a handpiece, which releasably surrounds a fiber optic light guide on its exit side end. A sleeve portion is releasably connected to the exit side end of the light guide, a condensing optical element being provided in the sleeve portion, optically dimensioned and arranged in the sleeve portion at a distance from the exit side end of the light guide such that the applied laser radiation can be focused in the ciliary body of the eye on contact of the sleeve portion with the surface of the eye.
摘要:
In a system and a method for examining an object containing a fluid liquid, the object is illuminated with measuring light and images are temporarily shortly subsequently recorded. The images are evaluated per pixel to determine perfusion data from a high frequency portion above 1 kHz and to determine further information about properties of the object from a low frequency portion below 100 Hz, such as a degree of oxygenation of hemoglobin, a concentration of hemoglobin or a concentration of ICG. This information determined by evaluation is displayed in a form of an image in superposition with a white light image of the object.
摘要:
The invention concerns an OCI medical device (100) comprising the following elements:—a coherent light source (120),—a 2D light sensor (120),—a screen (110) that displays OCI map and/or mixture map,—a processing unit that calculates the OCI map; all said elements being included in a single movable unit. The invention also relates to the use of said OCI medical device.
摘要:
The present invention relates to a functional optical coherent imaging (fOCI) platform comprising at least one active camera unit (ACU) comprising a coherent and/or a partially coherent light source, and means for spectral filtering and imaging a selected body area of interest; an image processing unit (IPU) for pre-processing data received from an ACU; at least one stimulation unit (STU) transmitting a stimulation to a subject; at least one body function reference measurement unit (BFMU); a central clock and processing unit (CCU), with interconnections to the ACU, the IPU, the STU, for collecting pre-processed data from the IPU, stimuli from the STU body function reference data from the BFMU in a synchronized manner; a post-processing unit (statistical analysis unit, SAU); and an operator interface (HOD. Further the invention relates to a process for acquiring stimuli activated subject data comprising the steps of aligning a body function unit at a subject and monitoring pre-selected body function; selecting a stimulus or stimuli; imaging a body area of interest; exerting one or a series of stimuli on the subject; imaging the body area of interest synchronous with said stimuli and the preselected body functions; and transferring said synchronized image, stimuli and body function data to a statistical analysis unit (SAU) and performing calculations to generate results pertaining to body functions.
摘要:
A method and a microscopy imaging apparatus for generating an optically sectioned image of a specimen are provided. The method comprises the steps of: illuminating the specimen with a modulating, spatially periodic illumination pattern; imaging said specimen on a conjugate image plane; acquiring a plurality of signals at respective positions on said image plane, each signal corresponding to the incident light intensity at that position and having an oscillatory component caused by the modulation of the illumination pattern; and measuring a characteristic of the oscillatory component of each of the signals, whereby the measured characteristics when combined in their relative positions generate an optically sectioned image of the specimen.
摘要:
The invention relates to a method and device for identifying luminescent molecules according to the fluorescence correlation spectroscopy method. The inventive method comprising the following steps: a) preparing a sample (12) containing luminescent molecules; b) illuminating the sample (12) using an optical excitation device (2,4,6,8) comprising at least one light source, at least one, in particular, diffractive optical element (7) for splitting light passing therethrough into multiple beams, and a focusing optics (8) for focusing multiple light beams passing therethrough into multiple confocal volume elements: c) capturing emission radiation from the multiple confocal volume elements by means of a locally resolving sensor matrix arrangement (20), whereby the sensor matrix arrangement is a sensor matrix, which is comprised of avalanche photodiodes AD is produced using IC technology, particularly CMOS technology, and is integrated in a sensor chip (20) with Greiger-mode wiring, and; d) processing the signals, which are provided by the avalanche photodiode matrix, by means of a signal processing and evaluation device preferably integrated in the sensor chip.