Ultrasound | 合法醫療器材資訊網

Ultrasoundissoundwaveswithfrequencieshigherthantheupperaudiblelimitofhuman...Theroleofarctiidmothclicksindefenseagainstecholocatingbats:interferencewithtemporalprocessing.InThomasJ,MossCF,VaterM(eds.).

Sound waves with frequencies above the human hearing range

An ultrasonic examination

Ultrasound is sound with frequencies greater than 20 kilohertz.[1] This frequency is the approximate upper audible limit of human hearing in healthy young adults. The physical principles of acoustic waves apply to any frequency range, including ultrasound. Ultrasonic devices operate with frequencies from 20 kHz up to several gigahertz.

Ultrasound is used in many different fields. Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws. Industrially, ultrasound is used for cleaning, mixing, and accelerating chemical processes. Animals such as bats and porpoises use ultrasound for locating prey and obstacl...

Ultrasound (Sonography) | 合法醫療器材資訊網

Ultrasound | 合法醫療器材資訊網

Functional ultrasound combines information such as the movement and velocity of tissue or blood, softness or hardness of tissue, and other physical ... Read More

Ultrasound scans | 合法醫療器材資訊網

Ultrasound scans are used to evaluate fetal development, and they can detect problems in the liver, heart, kidney, or abdomen. They may also assist in performing ... Read More

Ultrasound | 合法醫療器材資訊網

Ultrasound is sound waves with frequencies higher than the upper audible limit of human ... The role of arctiid moth clicks in defense against echolocating bats: interference with temporal processing. In Thomas J, Moss CF, Vater M (eds.). Read More

Functional ultrasound imaging | 合法醫療器材資訊網

Functional ultrasound imaging (fUS) is a medical ultrasound imaging technique of detecting or measuring changes in neural activities or metabolism, ... Read More

Ultrasound: Purpose, Procedure | 合法醫療器材資訊網

Ultrasound images are captured in real time. They're able to show the structure and movement of internal organs as well as blood flowing through blood vessels. Read More

How Ultrasound Works | 合法醫療器材資訊網

Ultrasound has been a popular medical imaging technique for many years. ... seeing the inside of the heart to identify abnormal structures or functions ... Read More

How Functional Ultrasound Works | 合法醫療器材資訊網

2018年2月9日 — Functional ultrasound shows color image maps that can indicate the softness or hardness of specific tissues, movement and velocity of tissue or ... Read More

Ultrasound | 合法醫療器材資訊網

2020年3月17日 — Diagnostic ultrasound, also called sonography or diagnostic medical sonography, is an imaging method that uses high-frequency sound waves ... Read More

Application of Ultrasound in Medicine | 合法醫療器材資訊網

由 A Carovac 著作 · 2011 · 被引用 167 次 — The technique is based on principle of functioning sonar (“Sonar Navigation and Ranging”). A sound wave is typically produced by a piezoelectric transducer ... Read More

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