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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.
A-scan ultrasound biometry; Abdominal ultrasonography; Acorn cyst sign; Acoustic angiography; Advanced Diagnostic Ultrasound in Microgravity; Air polymer-type A; American Institute of Ultrasound in Medicine; American Registry for Diagnostic Medical Sonography; American Society of Echocardiography; Ankle–brachial pressure index; Anomaly scan ...
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.
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Ultrasound can ablate tumors or other tissue non-invasively. [4] This is accomplished using a technique known as high intensity focused ultrasound (HIFU), also called focused ultrasound surgery. This procedure uses generally lower frequencies than medical diagnostic ultrasound (250–2000 kHz), but significantly higher time-averaged intensities.
Former Deputy Prime Minister Vu Duc Dam at the founding ceremony of University of Medicine and Pharmacy, November 18, 2020. [1]On May 20, 2010, Prof. PhD. Mai Trong Nhuan (Former Director of VNU-HN) signed Decision to establish the School of Medicine and Pharmacy - Vietnam National University - Hanoi.
[6] [2] He tries to come off as imposing, but ends up behaving more like a mischievous old man. [6] In reality, he is a guilt-ridden individual after losing his predecessor and friend, Big Bear who discourages insubordination within the Kyurangers' ranks for fear of repeating his mistake. [ 30 ]
I do disagree with the term ultrasonography and ultrasound in this context. There is a historical place for ultrasound; however, ultrasound is a term of physics meaning frequencies above human hearing, you obviously know this. Ultrasound is not unique to medical imaging. Many use “ultrasound” for medical and non-medical purposes.