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These techniques are known as Magnetic Resonance guided Focused Ultrasound Surgery (MRgFUS) [39] [40] and Ultrasound guided Focused Ultrasound Surgery (USgFUS) respectively. [1] [41] MRgFUS is a 3D imaging technique which features high soft tissue contrast and provides information about temperature, thus allowing to monitor ablation.
Echogenic intracardiac focus (EIF) is a small bright spot seen in the baby's heart on an ultrasound exam. This is thought to represent mineralization, or small deposits of calcium, in the muscle of the heart. EIFs are found in about 3–5% of normal pregnancies and cause no health problems.
Some sonic weapons make a focused beam of sound or of ultrasound; others produce an area field of sound. As of 2023 [update] military and police forces make some limited use of sonic weapons. Use and deployment
The original focused cardiac ultrasound protocol for non-cardiologists was devised by Dr Erik Sloth in 1989 and has formed the basis of hands-on FATE courses ever since. The success of the original protocol has inspired a surge of replicas in many shapes and the coining of many imaginative acronyms: FEER, FEEL, Focus, Bleep, HART, FUSE etc.
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.
Focused-ultrasound-mediated diagnostics or FUS-mediated diagnostics are an area of clinical diagnostic tools that use ultrasound to detect diseases and cancers. Although ultrasound has been used for imaging in various settings, focused-ultrasound refers to the detection of specific cells and biomarkers under flow combining ultrasound with lasers, microbubbles, and imaging techniques.
Focused assessment with sonography in trauma (commonly abbreviated as FAST) is a rapid bedside ultrasound examination performed by surgeons, emergency physicians, and paramedics as a screening test for blood around the heart (pericardial effusion) or abdominal organs (hemoperitoneum) after trauma.
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.