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SYMPOSIUM
Year : 2011  |  Volume : 4  |  Issue : 4  |  Page : 501-503

Clinical ultrasound physics


1 Department of Surgery, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
2 Department of Radiology, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates

Correspondence Address:
Fikri M Abu-Zidan
Department of Surgery, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al-Ain
United Arab Emirates
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0974-2700.86646

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Understanding the basic physics of ultrasound is essential for acute care physicians. Medical ultrasound machines generate and receive ultrasound waves. Brightness mode (B mode) is the basic mode that is usually used. Ultrasound waves are emitted from piezoelectric crystals of the ultrasound transducer. Depending on the acoustic impedance of different materials, which depends on their density, different grades of white and black images are produced. There are different methods that can control the quality of ultrasound waves including timing of ultrasound wave emission, frequency of waves, and size and curvature of the surface of the transducer. The received ultrasound signal can be amplified by increasing the gain. The operator should know sonographic artifacts which may distort the studied structures or even show unreal ones. The most common artifacts include shadow and enhancement artifacts, edge artifact, mirror artifact and reverberation artifact.


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