Correction of concentrated and distributed aberrations in medical ultrasound imaging

Arthur P. Berkhoff, J.M. Thijssen

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    A method is presented for iterative correction of wave fields aberrated in a plane located at an arbitrary distance from an array transducer. The signals received from the transducer are processed by an inverse extrapolator in such a way that the output yields the transducer signals as if the transducer had been located directly at the position of the aberrator. For subsequent transmission cycles, the same inverse extrapolator is applied to delta pulses at time instants incorporating the time-reversed estimated aberration profile. The method can be applied to scattering and absorptive media, i.e. in medical conditions. The compensation of distributed aberration is also developed. It is shown that correction algorithms intended for concentrated aberrations can be used to reduce effects due to distributed aberrations; our conclusions with respect to the position of the equivalent concentrated aberrator differ from results reported in the literature. The method is demonstrated on realistic simulations of solid lesions, and cysts (voids) disturbed by intervening aberrating media
    Original languageUndefined
    Number of pages6
    Publication statusPublished - 3 Nov 1996
    EventIEEE Ultrasonics Symposium 1996 - San Antonio, United States
    Duration: 3 Nov 19966 Nov 1996


    ConferenceIEEE Ultrasonics Symposium 1996
    Country/TerritoryUnited States
    CitySan Antonio


    • IR-64794
    • EWI-12815

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