Abstract:
Encapsulated tissue is contained in an optically transparent cassette (34). The cassette (34) or an endcap (38) enclosing the cassette is marked with a fiducial (40) indicating and corresponding to the location of the excision on the patient's body. An image, which is preferably a representation of a surface of the tissue specimen and the vertical section(s) area of the tissue internal of the specimen and adjacent to a surface thereof, is obtained by an imaging system (10). The cassette is moved, preferably in a stage (22) which rotates the cassette while translating it, so that the head (12) of the imaging system provides a linear scan in a direction perpendicular to the wall of the cassette (also perpendicular to the surface of the tissue encapsulated in the cassette). The imaging system's display (28) indicates the morphology at and in proximity to the surface of the specimen as well as the location thereof.
Abstract:
A system is provided for marking on a recording medium (36), such as a label, the location of imaged tissue with respect to an exposed surface of the tissue (34). Tissue is imaged by a microscope (11) capable of imaging sections of the tissue below the exposed tissue surface through optics. A ring (32) applied to the surface of the tissue stabilizes the tissue to the optics and localizes a portion of the tissue surface through an aperture in the ring. An actuator (38) is connected to both the ring and the microscope for moving the ring to adjust the position of the tissue with respect to the optics, thereby allowing an operator of the system to survey different images of tissue sections with the microscope.
Abstract:
In order to determine, rapidly and without the delay required by conventional tissue preparation techniques for pathological examination (freezing, sectioning, staining, etc.), whether, an excision, which may be a biopsy sample, is representative of the morphology of interest of whether an excisional biopsy in which the tissue taken completely removes the abnormality is, in either case, the tissue which is desired to be excisioned, the tissue specimen (18) in encapsulated, preferably as part of the biopsy procedure. The encapsulated tissue is contained in an optically transparent cassette (34). The cassette (34) or an endcap (38) enclosing the cassette is marked with a fiducial (40) indicating and corresponding to the location of the excision on the patient's body. An image, which is preferably a representation of a surface of the tissue specimen and the vertical section(s) area of the tissue internal of the specimen and adjacent to a surface thereof, is obtained by means of an electro-optical imaging system (10), preferably a confocal laser scanning microscope. The cassette is moved, preferably in a stage (22) which rotates the cassette while translating it, so that the head (12) of the confocal microscope (its objective lens) provides a linear scan in a direction perpendicular to the wall of the cassette (also perpendicular to the surface of the tissue encapsulated in the cassette). The display (28) from the microscope indicates the morphology at and in proximity to the surface of the specimen as well as the location thereof. The pathologist and the surgeon is thereby provided with information concerning the specimen and whether the entire abnormality desired to be removed has indeed been removed and/or whether the biopsy is representative of the body region of interest in the case of a biopsy sample.
Abstract:
An improved system for confocal imaging within dermal tissue of a patient is provided which minimizes instability in confocal images by reducing the relative motion of the tissue with respect to the confocal imaging optics of the system. The system includes a mechanism for maintaining an area of skin tissue under stress by application of force at the edges of the area, and an imaging head coupled to this mechanism for imaging the stressed skin. The mechanism includes a mechanical structure, such as a platen, brace, or attachment, which both supports the imaging head of the system and applies stress to a limited surface area of the tissue to minimize skin motion during confocal imaging.
Abstract:
An improved system for cellular surgery which includes a laser for producing a laser beam, and confocal optics for scanning and focusing the laser beam in tissue and generating confocal images of the tissue in accordance with returned light from the tissue. The confocal images are visualized on a display. The system includes a controller for enabling the operator to select one or more cells of the tissue in the displayed confocal images for surgical treatment. The controller operates the laser and confocal optics in a first mode to treat the tissue when the confocal optics focus the laser beam at least one region associated with the selected cells in the tissue, but at all other times operates the laser and confocal optics in a second mode which does not damage the tissue. The treatment may be localized to concentrate the energy of the laser to the region including the selected cell or cells, or the treatment may be non-localized to distribute the energy of the laser to the region which includes the selected cell(s) and also the cells of the tissue surrounding such selected cell(s). In another embodiment, an apparatus is provided having a confocal imaging system, which focuses a first laser beam through confocal optics to tissue and provides confocal images of the tissue, and a treatment system which focuses a second laser beam through the confocal optics coaxial with the first laser beam for treating at one or more selected locations in the imaged tissue.
Abstract:
A confocal scanning microscope system (10) using cross polarization effects and an enhancement agent (acetic acid) to enhance confocal microscope reflectance images of the nuclei of BCCs (basal cell carcinomas) and SCCs (squamous call carcinomas) in the confocal reflectance images of excised tumor slices. The confocal scanning microscope system having a laser (11) for generating an illumination beam (12), a polygon mirror (18) for scanning the beam to a tissue sample (22) and for receiving a return beam from the tissue sample and detector (28) for detecting the returned beam to form an image. The system further includes a half-waveplate (13) having a rotatable stage (14) and a quarter-wave plate (21) having a rotatable stage (20) disposed in the optical path of the illumination beam and at least a linear polarizer (24) having a rotatable stage (25) disposed in the optical pat of the returned beam from the tissue sample.
Abstract:
A tray or holder for tissue specimens, especially of excised tissue, such as biopsied specimens, is used with a confocal imaging system. The tray may be disposable after imaging of the specimen carried therein or may archive the specimen. A window supports the specimen. Clamps mounted inside the tray restrain the tissue. A compliant bag is mounted outside the tray on one side of a window of the tray on which the specimen is disposed. During imaging the specimen is immersed in a liquid contained in the tray having an index of refraction which closely matches the index of refraction of the tissue. The bag also contains an index matching liquid preferably having the same index as the liquid in the tray. Selecting an immersion liquid, which equals the refractive index of the near surface tissue, minimizing wavefront distortion which may result from an effectively corrugated surface of the specimen.
Abstract:
In order to facilitate pathological examination of a lesion in in-vivo tissue, a system and method are provided having a computer system in which both a camera for producing a digital macroscopic picture of the lesion and an imager are coupled to the computer system. The imager is responsive to the computer system and has optics for scanning the lesion to generate images representing microscopic sections of the lesion which provide sufficient information for pathological examination of the lesion. The computer system generates location information, referencing the location in the macroscopic picture of the lesion where the lesion was scanned to the images, and stores data in an electronic file structure which contains at least a representation of the images, a representation of the macroscopic picture, and the location information. The file structure may then be sent to another computer system for viewing the images stored in the file structure to facilitate pathological examination of the lesion by persons trained to interpret such images, adding a diagnostic report about the lesion to the data of the file structure, and sending back the file structure to the computer system that originated it.
Abstract:
An electro-optical sensor senses marks on a sheet which travels longitudinally with respect to a printed circuit board, carrying linear arrays of light sources (LEDs) and photodetectors and optics which define zones displaced laterally across the width of a sheet of paper, longitudinal columns of which can contain marks, the presence and absence of which marks is detected by the sensor. The sensor is especially adapted for use in detecting marks which indicate votes on paper ballots in electronic, computerized vote counting apparatus.
Abstract:
An electro-optical sensor senses marks on a sheet which travels longitudinally with respect to a printed circuit board, carrying linear arrays of light sources (LEDs) and photodetectors and optics which define zones displaced laterally across the width of a sheet of paper, longitudinal columns of which can contain marks, the presence and absence of which marks is detected by the sensor. The sensor is especially adapted for use in detecting marks which indicate votes on paper ballots in electronic, computerized vote counting apparatus.