Medical Ultrasonography
Diagnostic sonography (ultrasonography) is an ultrasound-based diagnostic imaging technique used for visualizing subcutaneous body structures including tendons, muscles, joints, vessels and internal organs for possible pathology or lesions. Obstetric sonography is commonly used during pregnancy and is widely recognized by the public.
In physics, the term "ultrasound" applies to all sound waves with a frequency above the audible range of normal human hearing, about 20 kHz. The frequencies used in diagnostic ultrasound are typically between 2 and 18 MHz.
Read more about Medical Ultrasonography: Diagnostic Applications, Therapeutic Applications, From Sound To Image, Sound in The Body, Modes of Sonography, Expansions, Attributes, Risks and Side-effects, Obstetric Ultrasound, Regulation
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“They said I’d never get you back again.
I tell you what you’ll never really know:
all the medical hypothesis
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struck leaves letting go.”
—Anne Sexton (1928–1974)