摘要:
A system comprises a medical device configured to be positioned at least partially within a scattering medium, the medical device comprising at least one optical fibre or other waveguide having a plurality of light-emitting regions arranged along at least part of the length of the at least one optical fibre or other waveguide; a pulsed light source configured to transmit pulsed light into a proximal end of the at least one optical fibre or other waveguide, such that the pulsed light is guided along the at least one optical fibre or other waveguide to the light-emitting regions and emitted by the light-emitting regions into the scattering medium; at least one detector configured to receive photons of the pulsed light that have passed through the scattering medium; and a processor configured to: select signals corresponding to at least some of the received photons; determine a respective location of each of the light-emitting regions based on the selected signals; and determine a path of at least part of the medical device based on the determined locations.
摘要:
Methods and apparatuses for enlarging the optical scan angle of imaging probes are provided. The optical scan angle of endoscopic probes can be increased by employing the "Snell's Window" effect. An endoscopic probe can include an endoscope shell, a means for capturing electromagnetic radiation, and a liquid or gel provided between the means for capturing electromagnetic radiation and the endoscope shell. The endoscope probe can further include a first mirror placed such that electromagnetic radiation entering through the endoscope shell can bounce off the first mirror and enter the means for capturing electromagnetic radiation. The first mirror can be a microelectromechanical systems (MEMS) mirror.
摘要:
A continuous flow endoscope device includes an elongated tubular member defining an interior, a first channel disposed within the interior of the elongated tubular member, a second channel disposed within the interior of the elongated tubular member, and an optics device disposed in a free space of the interior of the elongated tubular member. The second channel is configured to receive an instrument therein during a first portion of an operation. A lumen defined through the second channel is fluidly isolated from a lumen defined through the first channel. The free space of the interior of the elongated tubular member being a space within the interior of the elongated tubular member not occupied by either the first channel or the second channel.
摘要:
Die Erfindung betrifft ein Resektoskop (1) sowie eine Elektrodenanordnung (10) dafür. Das erfindungsgemäße Resektoskop (1) umfasst ein langgestrecktes Schaftrohr (2), eine darin angeordnete langgestreckte Optik (4) mit einem Objektiv (5) am distalen Ende und einer Elektrodenanordnung (10), wobei die Elektrodenanordnung (10) wiederrum eine Elektrode (11) umfasst, die am distalen Ende der Arme (12) einer Gabelbaugruppe (13) angeordnet ist, die auf gegenüberliegenden Seiten des Objektivs (5) angeordnet und in einem Übergangsbereich (14) zu einem Elektrodenschaft (15) zusammengeführt sind, wobei die Elektrodenanordnung (10) in Längsrichtung um eine Hublänge (90) von einer ersten Position, bei der die Elektrode (11) innerhalb des Schaftrohrs (2) vor dem Objektiv (5) angeordnet ist, in eine zweite Position, in der die Arme (12) der Gabelbaugruppe (13) aus dem Schaftrohr (2) ragen, ausfahrbar ist. Die Länge (91) der Arme (12) der Gabelbaugruppe (13) ist dabei größer als das 1,2-fache der Hublänge (90). Die erfindungsgemäße Elektrodenanordnung (10) ist entsprechend ausgestaltet.
摘要:
Exemplary spectrally encoded probes are provided having forward view capabilities. These probes are configured such that the detection element comprises a plurality of light collecting components, where the distal ends at least partially surround the illumination element and the proximal ends form a linear array that is optically connected to a dispersive component.
摘要:
Methods, apparatus, and systems for focusing light and remote imaging through a multi-mode fiber without pre-calibration and without direct localized feedback from the distal end of the fiber. Focus control is performed by optimally shaping the wavefront input to the fiber's proximal end according to feedback information embedded in back- propagating fluorescence from the distal end, via processing that exploits the partial cylindrical symmetry of the fiber, and which optimizes according to a weighting mask. Also included is a method for efficient photo-bleaching of a fluorescently-tagged sample, which optimizes the speed and efficiency of the photo-bleaching while minimizing or avoiding damage to non-tagged areas of the sample.
摘要:
A beam-shaping optical system suitable for use with optical coherence tomography includes a sheath defining a central cavity having an inner wall, an optical fiber positioned within a ferrule, the ferrule configured to mate with the inner wall of the sheath, and a beam-shaping insert positioned within the sheath and configured to mate with the inner surface of the sheath. The beam-shaping insert defines a beam-shaping element. The optical fiber is configured to emit an electromagnetic beam toward the beam-shaping element and the beam-shaping element is configured to reflect the electromagnetic beam externally to the beam-shaping insert.
摘要:
Systems, apparatuses, and methods are discussed herein for an endoscope. The endoscope has a distal tip with an oblique portion and a flat portion, the oblique portion defines a plane that forms an angle between and including 20 and 40 degrees to a central axis of the endoscope. A related sheath may have similar features at the distal tip.