ALARA - As Low As Reasonably Achievable, Color Doppler: Red - Flow moving forward or toward probe, Color Doppler: Blue - Flow moving backwards or away from probe, TGC - allows the sonographer to manually amplify the receiver gain gradually at specific depths, Gain - allows the sonographer to amplify or boost the echo signals, Focal zone - control allows the transducer to focus the transmitted sound at different depths, Field of view - control allows the sonographer to adjust the depth and width of the image, Doppler effect - the apparent change in frequency of sound or light waves emitted by a source as it moves away from or toward an observer, Attenuation - the sum of acoustic energy loss resulting from absorption, scattering, and reflection., Frequency - describes the number of oscillations per second performed by the particles of the medium in which the wave is propagating.,

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