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Individual transducer impulse response characterization method to improve image quality of array-based handheld optoacoustic tomography.

Opt. Lett. 46, 1-4 (2021)
Postprint DOI
Open Access Green
The physical properties of each transducer element play a vital role in the quality of images generated in optoacoustic (photoacoustic) tomography using transducer arrays. Thorough experimental characterization of such systems is often laborious and impractical. A shortcoming of the existing impulse response correction methods, however, is the assumption that all transducers in the array are identical and therefore share one electrical impulse response (EIR). In practice, the EIRs of the transducer elements in the array vary, and the effect of this element-to-element variability on image quality has not been investigated so far, to the best of our knowledge. We hereby propose a robust EIR derivation for individual transducer elements in an array using sparse measurements of the total impulse response (TIR) and by solving the linear system for temporal convolution. Thereafter, we combine a simulated spatial impulse response with the derived individual EIRs to obtain a full characterization of the TIR, which we call individual synthetic TIR. Correcting for individual transducer responses, we demonstrate significant improvement in isotropic resolution, which further enhances the clinical potential of array-based. handheld transducers.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
ISSN (print) / ISBN 0146-9592
e-ISSN 1539-4794
Zeitschrift Optics Letters
Quellenangaben Band: 46, Heft: 1, Seiten: 1-4 Artikelnummer: , Supplement: ,
Verlag Optical Society of America (OSA)
Verlagsort 2010 Massachusetts Ave Nw, Washington, Dc 20036 Usa
Begutachtungsstatus Peer reviewed
Förderungen H2020 European Research Council