The Mechanical Index (MI) is a measurement used mainly in the field of ultrasound, specifically in diagnostic imaging. It quantifies the potential for mechanical bioeffects caused by ultrasound waves in tissues. The MI is calculated based on the peak negative pressure of the ultrasound beam and its frequency. The Mechanical Index is particularly relevant in assessing the safety of ultrasound exposure. A higher MI indicates a greater potential for inducing cavitation and other mechanical effects, while a lower MI suggests a lower risk of such effects.
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