Resolution of scanning ultrasonic imaging systems with arbitrary transducer excitation

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Abstract
An analytical formulation is presented which predicts the imaging performance of broadband ultrasonic imaging systems. The effect of frequency dependent attenuation on image resolution is analysed. Examples of the case of a narrow RF pulse and a wideband FM chirp pulse excitation are presented. It is shown that as far as the imaging resolution is concerned it is possible to make a very good intuitive estimate of the « equivalent cw » frequency

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