Sonography is a technique based on sound waves that acquires images in real time without the use of ionizing radiation. The phenomenon perceived as sound is the result of periodic changes in the pressure of air against the ear-drum. The periodicity of these changes ranges from 1500-20,000 Hz. Ultrasound has a periodicity greater than 20Continue reading “ULTRASONOGRAPHY: Introduction, Principles, Indications, Advantages & Disadvantages”
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