摘要:
A MEMS-based particle manipulation system which uses a particle manipulation stage and a plurality of laser interrogation regions. The laser interrogation regions may be used to assess the effectiveness or accuracy of the particle manipulation stage. In one exemplary embodiment, the particle manipulation stage is a microfabricated, flap-type fluid valve, which sorts a target particle from non-target particles in a fluid stream. The laser interrogation stages are disposed in the microfabricated fluid channels at the input and output of the flap-type sorting valve. The laser interrogation regions may be used to assess the effectiveness or accuracy of the sorting, and to control or adjust sort parameters during the sorting process.
摘要:
The present disclosure provides improved particle processing (e.g., cytometry and/or cell purification) systems and methods that can operate in an autonomous fashion. More particularly, the present disclosure provides for assemblies, systems and methods for analyzing, sorting, and/or processing (e.g., purifying, measuring, isolating, detecting and/or enriching) particles (e.g., cells, microscopic particles, etc.) where human intervention is not required and/or is minimized. The systems, assemblies and methods of the present disclosure advantageously improve run performance of particle processing systems (e.g., cell purification systems, cytometers) by significantly reducing and/or substantially eliminating the burden of operation for human intervention by automating numerous functions, features and/or steps of the disclosed systems and methods.
摘要:
A sample analyzer comprising a flow cell for forming a sample flow, a light source for irradiating the sample flow in the flow cell with near ultraviolet flight, and an imaging section for taking an image of a particle contained in the sample flow irradiated with the near ultraviolet light by the light source is disclosed. A method for analyzing a sample is also disclosed.
摘要:
Methods, systems and apparatus are provided for sorting particles in a stream of a sample in a flow cytometer by producing from a stable sort having desirable sort characteristics multiple images of a portion of the stream; generating from the multiple images an averaged numerical reference standard representative of the stable sort; continuously collecting during the sorting multiple running images of the portion of the stream; generating from the multiple running images at least one numerical sample average representative of the sample sort of each collection of the multiple running images; and comparing each numerical sample average to the numerical reference standard and determining whether a sample average exhibits a deviation from the reference standard that requires an adjustment of the sort. The sort may then be adjusted to eliminate or reduce the deviation and maintain the stable sort of the reference histogram. A novel imaging apparatus may be employed in a flow cytometer performing this method.
摘要:
Gemäß des erfindungsgemäßen Verfahrens wird ein von der Bestrahlungseinrichtung (14) abgegebener Strahlungspuls (16) zur Bestrahlung einer zu untersuchenden Probe (22) genutzt. Die Strahlungspulse werden beispielsweise an einer Nipkow-Scheibe (20), die Bestandteil einer Optikeinrichtung (18,20,28) ist, gestreut und gelangen über einen Strahlteiler (38), wie durch die Pfeile (42) dargestellt, zu einer Detektionseinrichtung (30). Zeitlich versetzt hierzu gelangen von in der Probe (22) vorhandenen Partikeln gestreute oder reflektierte Strahlungspulse, wie durch die Pfeile (40,44) dargestellt ist, ebenfalls zur Detektionseinrichtung (30). Auf Grund des zeitlichen Versatzes zwischen diesen an der Detektionseinrichtung (30) ankommenden Streulichtpulsen kann das von in der Probe (22) vorhandenen Partikeln kommende Streulicht festgestellt und zur Bestimmung beispielsweise der Größe und der Form von in der Probe (22) enthaltenen Partikeln genutzt werden.
摘要:
With a method of controlling the flow in a flow system where a liquid flow contains a particle concentration, the liquid flow is surrounded by a carrier liquid. The liquid flow and carrier liquid are led into a central channel in which there is provided an observation area (4) where measurements of the liquid flow are effected. The result of the measurements are used to lead the liquid flow into one of several channels, in that control liquids are introduced into the liquid flow before this reaches the channels, the control liquids being derived from a capillary pump structure which pumps on the basis of an electro-kinetic effect, e.g. an electro-osmotic effect. In a preferred embodiment, the pump structure consists of two capillary structures, to each of which an electrical field can be applied. Depending on the strength of the field, the amount of control liquid will be able to be controlled so that the liquid flow with the particle concentration can be led to one of two channels. In a second embodiment, the pump structure consists of one capillary structure. The liquids can with advantage be controlled in such a manner that when the amount of liquid in the one capillary structure is increased, the amount of liquid in the second capillary structure will thus be reduced correspondingly. The advantage of the invention is first and foremost that the pumping is carried out without the use of mechanical pumping arrangements, which are relatively expensive. Moreover, a better retention of the flow pattern in the flow system is achieved.
摘要:
A flow imaging cytometer for imaging the dimensions and shapes of particle components in a flow of a specimen solution employs a separate control solution, which is for managing precision, containing standard particles. A method of adjusting focal point with respect to the specimen flow includes steps of imaging the standard particles in the control solution, calculating an evaluation parameter which represents the definition of the image, and moving the flow cell or associated optical system so as to maximize the value of this parameter.