attenuation coefficient

(redirected from Linear attenuation coefficient)
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attenuation coefficient

in radiography or ultrasound, the difference between the energy that enters a body part and the energy that is not detected. The difference is caused by the absorption and scattering of energy within the body tissues.

attenuation coefficient

A measure of the attenuation of energy waves or particles caused by absorption of energy as they pass through a particular medium (e.g., air, tissue, lead).

attenuation coefficient

The calculated remainder of the x-ray beam that is received by the detectors in a computed tomography (CT) unit. This value is used to determine the CT (Hounsfield) number.
See also: coefficient
References in periodicals archive ?
In the trial with rot-free discs, a mean value of the linear attenuation coefficient ([[micro].
The linear attenuation coefficient adopted as a parameter is valid only for the analysis of logs of the studied species and of similar diameters.
The calibration of the CT scanner was obtained through the correlation between linear attenuation coefficients [mu] ([cm.