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      Use of modulated excitation signals in medical ultrasound. Part II: design and performance for medical imaging applications

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          Coded excitation system for improving the penetration of real-time phased-array imaging systems.

          Based on an analysis of the inherent signal-to-noise ratio (SNR) in medical ultrasound imaging, SNR improvements of 15-20 dB are theoretically possible for real-time phased-array imagers using coded excitation. A very simple coded excitation for phased arrays based on the principles of ;pseudochirp' excitation and equalization filtering is described. This system is capable of SNR improvements of about 15 dB with range sidelobe levels acceptable for many medical imaging applications. Such improvements permit increased operating frequencies, and hence enhanced spatial resolution, for real-time array imagers. Both simulations and measurements are used to demonstrate the efficacy of the method.
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            Use of modulated excitation signals in medical ultrasound. Part I: basic concepts and expected benefits

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              An effective coded excitation scheme based on a predistorted FM signal and an optimized digital filter

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                Author and article information

                Journal
                IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
                IEEE Trans. Ultrason., Ferroelect., Freq. Contr.
                Institute of Electrical and Electronics Engineers (IEEE)
                0885-3010
                February 2005
                February 2005
                : 52
                : 2
                : 192-207
                Article
                10.1109/TUFFC.2005.1406546
                4fb6b60f-ec28-4282-a7b6-c826520899c8
                © 2005
                History

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