Positron Emission Tomography (PET)

Science / Psychiatry / Positron Emission Tomography (PET): (poz-ih-tron e-mish-en toe-mog-ra-fe) A technique used to evaluate the activity of brain tissues. PET scanning is used as a research tool in schizophrenia, cerebral palsy, and similar types of brain damage.

Thermionic Emission

Science / Chemistry / Thermionic Emission: The emission of electrons or ions by a hot object. For example, the filament in a mass spectrometer spits out energetic electrons that ionize atoms and molecules in the sample. MORE

Tomography

Entertainment / Photography / Tomography: Radiographic technique used in medial photography. MORE

Positron Emission Tomography (PET)

Science / Psychiatry / Positron Emission Tomography (PET): (poz-ih-tron e-mish-en toe-mog-ra-fe) A technique used to evaluate the activity of brain tissues. PET scanning is used as a research tool in schizophrenia, cerebral palsy, and similar types of brain d MORE

Non-Road Emissions

Business / Agriculture / Non-Road Emissions: Pollutants emitted by non-road engines and non-road vehicles, e.g., farm and construction equipment, gasoline-powered lawn and garden equipment, and power boats and outboard motors. The Clean Air Act, MORE

Emission

Business / Agriculture / Emission: Waste released or emitted to the environment. The term is commonly used in referring to discharges of gases and particles to the atmosphere, i.e., air pollutants, and also is used in referring to part MORE

Emission Spectrum

Science / Chemistry / Emission Spectrum: A plot of relative intensity of emitted radiation as a function of wavelength or frequency. MORE

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