摘要:
In accordance with embodiments of the present technique, a combined modality imaging system includes a first imaging device of a first modality and a second imaging device of a second modality that is different from the first modality. The first and the second imaging devices are both adapted to interact with a contrast agent adapted to be received in a subject. The contrast agent includes an deformable particle that has a geometry that varies in response to an emission from the first imaging device. The deformable particle also includes a fluorescent component adapted to emit electromagnetic radiation that is detectable by the second imaging device and a quenching component separated from the fluorescent component at a distance based on the geometry and that which is adapted to absorb a portion of the electromagnetic radiation from the fluorescent component.
摘要:
A method and system for localization of fluorescence in a scattering medium such as a biological tissue are provided. In comparison to other optical imaging techniques, this disclosure provides for improved spatial resolution, decreased computational time for reconstructions, and allows anatomical and functional imaging simultaneously. The method including the steps of illuminating the scattering medium with an excitation light to excite the fluorescence; modulating a portion of the emitted light from the fluorescence within the scattering medium using an ultrasonically induced variation of material properties of the scattering medium such as the refractive index; detecting the modulated optical signal at a surface of the scattering medium; and reconstructing a spatial distribution of the fluorescence in the scattering medium from the detected signal.
摘要:
A technique is provided for imaging based on localization of fluorescence in a medium. The technique includes illuminating the medium with an excitation light to excite fluorescence, scanning the medium at a plurality of locations via an ultrasonic beam, modulating a portion of the emitted light from the fluorescence via the ultrasonic beam at each of the plurality of locations, differentially detecting the modulated light at a boundary of the medium, and reconstructing an image from the detected signal.
摘要:
Methods and compositions for detecting and localizing light from a subject are disclosed. Also disclosed are methods for targeting light emission to selected regions, as well as for tracking entities within the subject. Also disclosed are methods for locating a target in a subject, such as by detecting light emission from a target site.
摘要:
A system and method for fiber optic bundle-based illumination for an imaging system is disclosed. According to one embodiment of the present invention, the system includes a fiber optic bundle that comprising a plurality of optical fibers. Each optical fiber receives light from a light source. The system also includes a beam forming element that selects a mode of operation for the imaging system. The system further includes a beam deflecting device that deflects the light on a sample. According to one embodiment of the present invention, the method includes the steps of (1) selecting a mode of operation for the imaging system; (2) transmitting light from at least one light source through a fiber optic bundle, the fiber optic bundle comprising a plurality of optical fibers; (3) providing a beam forming element based on the selected mode of operation; and (4) deflecting the focused light on a sample.
摘要:
The present invention provides a compact optical probe assembly that measures ultrasound in materials. The probe uses angle-terminated optical fiber to direct illumination laser light at the surface of a remote target. Ultrasonic displacements at the surface scatter the illumination laser light. Angle-terminated optical fibers collect phase modulated light and direct the phase modulated light to an optical processor to produce a signal representative of the ultrasonic surface displacements. The probe may also incorporate angle-terminated optical fibers to direct generation laser light to the surface of a remote target to generate ultrasonic surface displacements. Optional shared beam forming element(s) may optically act on the illumination laser and collected phase modulated light.
摘要:
The invention relates to a method for adjusting focus in an automated microscope. The method may comprise the steps of: providing an optical detector for image acquisition, wherein the optical detector comprises an array of sensor pixels; designating a region of interest in the array of sensor pixels to emulate a confocal aperture; directing a light beam to illuminate an object according to a predefined pattern, thereby forming an image of the illuminated pattern at the optical detector, wherein the image of the illuminated pattern substantially overlaps the designated region of interest; detecting a light intensity from sensor pixels located within the designated region of interest; and adjusting a relative focal position of an objective lens based on the detected light intensity.
摘要:
A system and method are described for optoacoustic imaging a structural or compositional characteristic of an biological object using a coherent, broad range frequency tunable, electromagnetic radiation source and a pulse shaper to generate a sequence of electromagnetic radiation excitation signals.
摘要:
An imaging apparatus is disclosed. The imaging apparatus includes a source of electromagnetic radiation that is configured to emit electromagnetic radiation at two or more wavelengths through an imaging volume. The imaging apparatus also includes an ultrasound transducer that is configured to direct ultrasound waves through the imaging volume such that electromagnetic radiation passing through the imaging volume is modulated at the frequency of the ultrasound waves. The imaging apparatus further includes one or more electromagnetic radiation detectors that are configured to detect the modulated electromagnetic radiation from the imaging volume.
摘要:
The present invention provides a compact optical probe assembly that measures ultrasound in materials. The probe uses angle-terminated optical fiber to direct illumination laser light at the surface of a remote target. Ultrasonic displacements at the surface scatter the illumination laser light. Angle-terminated optical fibers collect phase modulated light and direct the phase modulated light to an optical processor to produce a signal representative of the ultrasonic surface displacements. The probe may also incorporate angle-terminated optical fibers to direct generation laser light to the surface of a remote target to generate ultrasonic surface displacements. Optional shared beam forming element(s) may optically act on the illumination laser and collected phase modulated light.