Sound waves with frequencies higher than the upper audible limit of human hearing, typically above 20,000 hertz. In medical imaging, ultrasound is used to visualize internal body structures.
A device that converts electrical energy into ultrasound waves and vice versa. In medical ultrasound, transducers emit ultrasound waves and receive the echoes to create images.
The use of ultrasound waves for medical imaging. Professionals who perform ultrasound examinations are called sonographers.
A change in frequency or wavelength of a wave in relation to an observer moving relative to the source. In ultrasound, the Doppler effect is used to assess blood flow and detect abnormalities.
Brightness mode imaging, commonly known as 2D ultrasound. It produces a two-dimensional image representing the internal structures of the body.
Motion mode imaging. It displays a single scan line over time, useful for assessing motion in specific structures, such as heart valves.
The number of oscillations of a wave per unit of time. In ultrasound, frequency is crucial for determining image resolution.
A conductive medium applied to the skin before placing the transducer. It enhances the transmission of ultrasound waves and prevents air pockets.
The reduction of the intensity of ultrasound waves as they travel through tissues. It is essential for understanding image quality and penetration depth.
An unintended and often misleading image on the ultrasound display, not representing the actual anatomy. Artifacts can result from various sources, such as shadowing or reverberation.
A therapeutic technique that uses focused ultrasound waves to target specific tissues, often used for non-invasive treatments like tumor ablation.
Substances introduced into the body to enhance the visibility of certain structures during ultrasound imaging. Microbubbles are commonly used as contrast agents.