Lecture

Introduction to Flow Cytometry

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In course

BIOENG-399: Immunoengineering

Immunoengineering is an emerging field where engineering principles are grounded in immunology. This course provides students a broad overview of how engineering approaches can be utilized to study immunology, model immune systems, modulate immune response ...

Description

This lecture provides an overview of flow cytometry, a powerful technology for analyzing thousands of cells per second and detecting multiple parameters within heterogeneous populations. The instructor, Miguel Garcia, covers the principles of flow cytometry, the components of a cytometer, the fluidics system, optics, lasers, filters, detectors, and electronic signal conversion. The lecture also delves into the applications of flow cytometry, such as immunophenotyping, cell cycle analysis, cell sorting, and analysis of rare cell populations. Additionally, it explores the concepts of fluorescence, fluorophores, and DNA analysis using flow cytometry techniques.

Instructor

Li Tang

Education and Training Postdoctoral Fellow, Massachusetts Institute of Technology, 2013 - 2016 Ph.D., University of Illinois at Urbana-Champaign, 2007 - 2012 B.S., Peking University, 2003-2007

Official source

Related concepts (32)

Flow cytometry

Flow cytometry (FC) is a technique used to detect and measure physical and chemical characteristics of a population of cells or particles. In this process, a sample containing cells or particles is suspended in a fluid and injected into the flow cytometer instrument. The sample is focused to ideally flow one cell at a time through a laser beam, where the light scattered is characteristic to the cells and their components. Cells are often labeled with fluorescent markers so light is absorbed and then emitted in a band of wavelengths.

Laser diode

A laser diode (LD, also injection laser diode or ILD, or diode laser) is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction. Driven by voltage, the doped p–n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission.

Dye laser

A dye laser is a laser that uses an organic dye as the lasing medium, usually as a liquid solution. Compared to gases and most solid state lasing media, a dye can usually be used for a much wider range of wavelengths, often spanning 50 to 100 nanometers or more. The wide bandwidth makes them particularly suitable for tunable lasers and pulsed lasers. The dye rhodamine 6G, for example, can be tuned from 635 nm (orangish-red) to 560 nm (greenish-yellow), and produce pulses as short as 16 femtoseconds.

Laser medicine

Laser medicine consists in the use of lasers in medical diagnosis, treatments, or therapies, such as laser photodynamic therapy, photorejuvenation, and laser surgery. The word laser stands for "light amplification by stimulated emission of radiation". The laser was invented in 1960 by Theodore Maiman, and its potential uses in medicine were subsequently explored. Lasers benefit from three interesting characteristics: directivity (multiple directional functions), impulse (possibility of operating in very short pulses) and monochromaticity.

Analogue filter

Analogue filters are a basic building block of signal processing much used in electronics. Amongst their many applications are the separation of an audio signal before application to bass, mid-range, and tweeter loudspeakers; the combining and later separation of multiple telephone conversations onto a single channel; the selection of a chosen radio station in a radio receiver and rejection of others.

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