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Ultrasound is defined by the American National Standards Institute as "sound at frequencies greater than 20 kHz". In air at atmospheric pressure, ultrasonic waves have wavelengths of 1.9 cm or less. Ultrasound can be generated at very high frequencies; ultrasound is used for sonochemistry at frequencies up to multiple hundreds of kilohertz.
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
Diagnostic medical sonography (DMS), a branch of diagnostic medical imaging, is the use of imaging by medical ultrasound for medical diagnosis. DMS uses non-ionizing ultrasound to produce 2D and 3D images of the body. In Canada, the credentialing for diagnostic medical sonography is the Canadian Association of Registered Ultrasound Professionals.
Echogenicity (sometimes as echogenecity) or echogeneity is the ability to bounce an echo, e.g. return the signal in medical ultrasound examinations. In other words, echogenicity is higher when the surface bouncing the sound echo reflects increased sound waves.
Target sign (Ultrasound) Teacup calcification (breast) Teardrop sign; Terry Thomas Sign; Threads and streaks sign; Three sign (cardiac) Thumb sign; Thumbprint sign; Thurstan Holland sign; Thymic sail sign; Tooth sign; Tram track sign; Tree in bud sign; Trethowan's sign; Trolley track sign; Trough sign; Tubular artery sign; Tulip bulb sign ...
Echocardiography, also known as cardiac ultrasound, is the use of ultrasound to examine the heart. It is a type of medical imaging , using standard ultrasound or Doppler ultrasound . [ 1 ] The visual image formed using this technique is called an echocardiogram , a cardiac echo , or simply an echo .
Below are useful terms on ultrasound: [4] Echogenic – giving rise to reflections (echoes) of ultrasound waves; Hyperechoic – more echogenic (brighter) than normal; Hypoechoic – less echogenic (darker) than normal; Isoechoic – the same echogenicity as another tissue; Transvaginal ultrasonography – Ultrasound is performed through the vagina
Meaning Origin language and etymology Example(s) -ula, -ule: small Latin Nodule ultra-beyond, excessive Latin ultra: ultrasound, ultraviolet: umbilic-of or pertaining to the navel, the umbilicus: Latin umbilīcus, navel, belly-button umbilical: ungui-of or pertaining to the nail, a claw Latin unguis, nail, claw unguiform, ungual: un(i)-one ...