ULTRASOUND An ultrasound is a medical imaging technique uses high frequency sound waves to look inside the body. During World War 2‚ there was a lot of research of radar and sonar which led to the invention and progress of the ultrasound device. It was invented by Ian Donald in 1957. It was first tested on a pregnant woman but later used for more purposes. The ultrasound was improved and also led to the development of other useful medical instruments such as the device CAVITRON‚ which destroys
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Ultrasound is a sound pressure with a frequency greater than the limit of human hearing. This limit varies from person to person‚ it is around 20 kilohertz in young adults. 20 kHz is a useful lower limit in describing ultrasound. The making of ultrasound is used in many different fields ‚ a property also used by animals such as bats for hunting. The most well known application of ultrasound is its use in sonography to produce pictures of foetuses in the woman’s womb. Ultrasound is also used for
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Tim Watson. (2008). Ultrasound in contemporary physiotherapy practice. Ultrasonics ‚ 48‚ 321-329. Abstract Therapeutic Ultrasound is a well established and commonly used practice in the field of Physiotherapy and Rehabilitative sciences. Primarily ultrasound is used in the treatment and repair of soft tissue lesion management used as thermal modality. However in recent practice the non-thermal aspects of Ultrasound as intervention are being employed. Evidence indicates the dose dependant
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diagnostic ultrasound have a role in emergency medicine? Introduction Emergency medicine (EM) is the medical specialty involving care for undifferentiated and unscheduled patients with illnesses or injuries requiring immediate medical attention. The specialty is not limited to the emergency department and may be practiced in numerous other settings including urgent care clinics‚ ambulances‚ at disaster sites‚ and even through telecommunications technology‚ known as telemedicine. Diagnostic ultrasound is
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History‚ Use and Safety of Ultrasound Introduction Ultrasound is the generation of energy using sound wave of about 20‚000 or more vibrations per second. The ultrasound is mostly used in imaging tools and particularly in medical diagnosis. The ultrasound uses sound waves that are above the frequency of the human ear. A transducer is used to give off the sound waves that are reflected back from the tissues‚ and organs giving a picture of what are inside the body. This is later drawn on
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Wave: The generator of ultrasonic wave is nothing but an oscillator‚ which can generate these high frequency waves. The ultrasonic waves can be produced by the following methods. a) Magnetostriction Generator b) Piezoelectric or Ultrasound Generator a) Magnetostriction Effect This effect is very useful in generating ultrasonic waves are known as Magnetostriction effect. This effect was first discovered by Joule in 1847 & subsequently used by G.W Pierre in an oscillator
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Ultrasounds are becoming a common diagnostic procedure in the medical field because they can measure and detect abnormalities. Ultrasound instruments which are also known as sonographic instruments operate by using high frequency sound waves. These sound waves operate using a frequency range of 1 to 18 megahertz that can be used for imaging. These high-frequency sound waves are out of range of human hearing. The lower frequency of the sound waves produce less resolution but can produce images
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ULTRASOUND TECHNICIAN ULTRASONOGRAPHY TECHNICIAN AS A PROFESSION Ultrasonography is primarily a medical imaging technique used to diagnose pathological lesions‚ organ swellings or foetuses (in case of prenatal care). This imaging technique is performed by an Ultrasound technician‚ who is an ultrasonography specialist. The specialist would direct ultrasonic waves into the patient’s body to diagnose the medical condition of internal organs or foetus’ development. Ultrasound is a non invasive procedure
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Ultrasound Ultrasound is an imaging technique that uses high frequency sound wave and echoes. There are different kinds of ultrasound they are two-dimensional image‚ 3D ultrasound imagining‚ and Doppler ultrasound. Doppler ultrasound is based on the Doppler effect. (Doppler effect is whenever relative motion exists between a source of sound and a listener and the frequency of the sound heard by the listener sounds different compared to the frequency when there is no motion.) The frequency of the
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2 Basics of Ultrasound Imaging Vincent Chan and Anahi Perlas 13 14 14 14 15 18 19 19 Introduction ................................................................................................................... Basic Principles of B-Mode US...................................................................................... Generation of Ultrasound Pulses ................................................................................... Ultrasound Wavelength and Frequency ..........
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