Neuroscience

Using fNIRS to evaluate surgical competency

A team of researchers affiliated with several institutions in the U.S. has developed a way to test surgical competency by using brain imaging technology to analyze the brains of surgeons in action. In their paper published ...

Neuroscience

Neuroscientists get at the roots of pessimism

Many patients with neuropsychiatric disorders such as anxiety or depression experience negative moods that lead them to focus on the possible downside of a given situation more than the potential benefit.

Neuroscience

New MRI sensor can image activity deep within the brain

Calcium is a critical signaling molecule for most cells, and it is especially important in neurons. Imaging calcium in brain cells can reveal how neurons communicate with each other; however, current imaging techniques can ...

Neuroscience

Helping make brain surgery safer

A biopsy needle that can help surgeons identify and avoid blood vessels in the brain during surgery has undergone initial tests in humans.

Diseases, Conditions, Syndromes

Biomarkers may predict Zika-related birth defects

USC researchers have identified biomarkers associated with severe birth defects in babies born to women infected with the Zika virus, a discovery that could lead to screening tests and a better understanding about how the ...

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Image

An image (from Latin imago) is an artifact, or has to do with a two-dimensional (a picture), that has a similar appearance to some subject—usually a physical object or a person.

Images may be two-dimensional, such as a photograph, screen display, and as well as a three-dimensional, such as a statue. They may be captured by optical devices—such as cameras, mirrors, lenses, telescopes, microscopes, etc. and natural objects and phenomena, such as the human eye or water surfaces.

The word image is also used in the broader sense of any two-dimensional figure such as a map, a graph, a pie chart, or an abstract painting. In this wider sense, images can also be rendered manually, such as by drawing, painting, carving, rendered automatically by printing or computer graphics technology, or developed by a combination of methods, especially in a pseudo-photograph.

A volatile image is one that exists only for a short period of time. This may be a reflection of an object by a mirror, a projection of a camera obscura, or a scene displayed on a cathode ray tube. A fixed image, also called a hard copy, is one that has been recorded on a material object, such as paper or textile by photography or digital processes.

A mental image exists in an individual's mind: something one remembers or imagines. The subject of an image need not be real; it may be an abstract concept, such as a graph, function, or "imaginary" entity. For example, Sigmund Freud claimed to have dreamt purely in aural-images of dialogues. The development of synthetic acoustic technologies and the creation of sound art have led to a consideration of the possibilities of a sound-image made up of irreducible phonic substance beyond linguistic or musicological analysis.

This text uses material from Wikipedia, licensed under CC BY-SA