Ultrasound

Ultra big(p) What is Ultra drop dead? Ultra healthy or ultrasonography is a medical examination imaging technique that uses high relative frequency sound waves. It is a high pitch frequency that can not be heard by the human ear. In ultra sound the following happens: High frequency sound pulses (1-5megahertz) are transmittable from the ultrasound machine into your body using a probe. The sound wave will travel into your body until it accomplishs an object such(prenominal) as soft tissue and b sensation. When the sound wave hits these objects just about of the wave will be reflected back to the probe. While some waves may carry on further till they hit another object and then reflected back. The probe picks up these reflected sound waves and relays them to the machine. The distance and time from the probe, to where the sound wave was reflected, to when the echo is true back is calculated by the machine. A two dimensional image like below is produced displaying the distances on the screen. Ultrasound Image interpreted from (Freudenrich, C, 1998) How an Ultrasound machine works? An ultrasound machine is make up of many pcts: The Transducer Probe The probe is responsible for send and receiving of the waves. It is the main part of the machine.

The probe generates and receives the waves by the principle of piezoelectric effect. This was discovered in 1880 by Pierre and Jacques Curie. The probe contains one or more quartz crystals called piezoelectric crystals. When these crystals are trim down to a specific shape they become an important part of the ultrasound system. They can contract in one mode and expand in another when an alternating electric period is passed through the crystal. Each Piezo-electrical crystal has its own resonant frequency and when the electric current is applied, it will oscillate and vibrate at that exact frequency. So the same crystal can be used to send and receive the waves. Within the probe it has a sound absorbing substance to eliminate reflections... If you want to set out a full essay, order it on our website: Orderessay

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