摘要:
A device or support, system and method are provided for precisely targeted and/or highly controlled interaction with a targeted cell or tissue in a body, with the support providing an ergonomic connecting interface for selectively connecting the support to a cell or tissue with at least minimal adverse affect to such cell or tissue, the system providing a remote facility that may be operatively associated with the support, and the method providing steps for employing the support and/or system so as to, inter alia, improve treatment, diagnostic and/or monitoring techniques and increase sensitivity and specificity with respect to interacting with, for example, diseased or abnormal cells or tissue without adversely effecting surrounding healthy cells or tissue, and/or the body in general.
摘要:
The invention relates to a light-emitting apparatus (100) comprising an optical waveguide, particularly an optical fiber (1), for guiding a primary light beam (Bprim) into a light-splitting unit (101) which splits it into two or more partial light beams (B1, B3, B4) which are emitted in different directions and have different optical qualities, e.g. different spectral compositions or polarizations. The apparatus may optionally comprise a detector (4) for determining a Doppler shift (Δλi) in reflected light reentering the light-splitting unit (101). This renders it possible to measure simultaneously two or more spatially independent vector components of the flow velocity of a fluid, particularly of blood, surrounding the light-splitting unit (101).
摘要:
A vacuum cleaning device comprises a unit (1) for aerodynamically affecting dust particles and/or a surface to be cleaned. The unit (1) comprises a housing (30) having a housing wall (31) encompassing two internal sections (20, 22), and a movable surface (11) arranged at an interface of the two sections (20, 22), wherein a portion (32) of the housing wall (31) delimiting a first section (20) is provided with at least one opening (21), and wherein means for actuating the movable surface (11) are arranged in a second section (22). A portion (33) of the housing wall (31) delimiting the second section (22) is adapted to at least hinder exchange of air between an inside of this section (22) and an outside of the housing (30) at the location of this section (22), in order to at least hinder a migration of dust to the second section (22).
摘要:
A vacuum cleaning device comprises a unit (1) in which an oscillating airflow is generated which substantially zero net flow and an asymmetry between the suction and the blowing phases, such that in the blowing phase a jet is generated. A generator (31) which is needed for generating the oscillating airflow comprises a movable surface (30) which is integrated in a wall (12) of a housing (10) having an internal space (11) and at least one opening (13) for allowing air to flow to and from the internal space (11). The jet can be generates when the so-called Strouhal number, being the frequency of the movement of the movable surface (30) multiplied by a characteristic dimension of the opening (13) and divided by the velocity of the air in the opening (13), is not higher than a predetermined maximum.
摘要:
A vacuum cleaning device comprises a unit (1) for aerodynamically affecting dust particles and/or a surface to be cleaned. The unit (1) comprises a housing (30) having a housing wall (31) encompassing two internal sections (20, 22), and a movable surface (11) arranged at an interface of the two sections (20, 22), wherein a portion (32) of the housing wall (31) delimiting a first section (20) is provided with at least one opening (21), and wherein means for actuating the movable surface (11) are arranged in a second section (22). A portion (33) of the housing wall (31) delimiting the second section (22) is adapted to at least hinder exchange of air between an inside of this section (22) and an outside of the housing (30) at the location of this section (22), in order to at least hinder a migration of dust to the second section (22).
摘要:
An ultrasonic assembly suited for attachment to a catheter, e.g. for medical treatment. The ultrasonic assembly includes an adjustable ultrasonic focus mechanism arranged in connection with the ultrasonic transducer to adjust focus of ultrasonic waves generated by the transducer. The ultrasonic focus mechanism includes a fluid focus lens with at least two fluids separated by an interface such that ultrasonic waves are substantially reflected at the interface. At least two electrodes are arranged in connection with the fluid focus lens so as to allow adjustment of the interface shape, e.g. a curvature of the interface, when a voltage is applied to the electrodes. In preferred embodiments the electrodes are arranged so as to allow adjustment of the fluid focus lens in an elevation direction as well as in a radial direction. In simple embodiments with rotational symmetric geometry with the transducer positioned in the center of the fluid focus lens, ultrasonic waves can be focused in an annular ring. This is e.g. suitable for ablative or coagulative necrotic treatment of human tissue, e.g. for atrial fibrillation treatment. In some embodiments, the assembly has a number of separate individually adjustable fluid focus lens compartments allowing a more detailed control of the ultrasonic focus pattern.
摘要:
The present disclosure provides advantageous systems and methods for significantly increasing the sensitivity and selectivity for diagnostic procedures, e.g., optical biopsy. The disclosed systems and methods use a highly non-linear effect, the so-called photon avalanche. In the regime close to the avalanche threshold, small differences in density of the probe-ion under investigation or the excitation power can result in very large changes in up-conversion emission intensity. Through this effect, it becomes possible to accurately measure the signal of an optical biopsy probe-ion only in the location(s) where its concentration is highest, while at the same time significantly reducing or eliminating measurement of background signal from probe-ions distributed with a somewhat lower concentration throughout the measurement volume. Also background auto-fluorescence of the surrounding healthy tissue is essentially absent with this technique.
摘要:
A catheter apparatus (100, 2000, 3000, 4000, 540) includes an elongated body (110) having proximal (112) and distal (114) ends, an acoustic transducer (130, 2300, 5 3300, 4300, 544), disposed proximate the distal end (114) of the elongated body (110), and a variably-refracting acoustic lens (140, 2200, 3200, 4200, 542) adapted to dynamically adjust a direction associated with an acoustic wave coupled to the acoustic transducer in response to one or more control signals provided thereto.
摘要:
A catheter having ultrasound capability and a distal end extending along a longitudinal axis, the end being situated adjacent to a tissue of interest inside of a patient; at least one ultrasound transducer located in the end to direct ultrasound waves along the axis in a generally forward direction relative to the end; a variable-focus lens system located in the end, downstream of the transducer in the generally forward direction, the lens system being capable of variably focusing the ultrasound waves emitted by the transducer at various positions downstream of the lens and catheter end; optionally, a mirror located in the end, downstream of the transducer and the lens system in the generally forward direction, whereby the emitted ultrasound waves from the lens system are either reflected from the mirror and focused at a position substantially perpendicular to the longitudinal axis; or the emitted ultrasound waves from the lens system substantially bypass the mirror in unreflected form and are focused at a position downstream of the transducer, the lens system and the mirror in the generally forward direction along the longitudinal axis; and imaging means for translating the focused ultrasound waves from the lens system reflected and/or unreflected by the mirror into three-dimensional images and communicating the images in viewable form to a human operator that is external to the patient. A method of measuring, imaging and viewing blood flow velocity and patterns in a blood vessel and aneurysm, as well as monitoring vaso-occlusive coil placement in an aneurysm during a surgical intervention using the catheter, is also disclosed.
摘要:
The invention relates to a system for reading data from a holographic storage medium (HSM), said system comprising an optical ring cavity defining a closed optical path so as to recycle the light of a reference beam that is used to read out the holographic storage medium, in view of increasing the light path efficiency by lengthening its path.