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.

 

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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 . . . View Full Definition

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.

Tomography: Radiographic technique used in medial photography.

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 Clea . . . View Full Definition

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 referri . . . View Full Definition

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

CT Scanning (Computerized Tomography): (to-mog-raf-ee) A technique using x-rays or ultrasound waves to produce an image of interior parts of the body. For example, within the skull it can be used to view parts of the brain as an . . . View Full Definition