ultrasound

n. sound whose frequency exceeds the human audibility range, often used to measure and record structures and structural change within the body in the imaging technique called ultrasonography (or sonography). Echoes from ultrasound waves reflected from tissue surfaces are recorded to form structural images for diagnostic purposes, such as to examine a growing fetus during pregnancy or to examine internal organs, such as the heart, liver, kidneys, and gallbladder, for signs of health or disease. Compare infrasound.

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Psychology term of the day

February 22nd 2025

imaging

1. the process of scanning the brain or other organs or tissues to obtain an optical image that can be used for medical and research purposes, such as locating abnormalities or studying anatomy and function. Techniques used include computed tomography, positron emission tomography (PET), anatomical magnetic resonance imaging (aMRI), and functional magnetic resonance imaging (fMRI). The imaging may be either static or dynamic. See also brain imaging; nuclear imaging.

2. in therapy, the use of suggested mental images to control body function, including the easing of pain. See also imagery technique; visualization.