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Basak, K. ; Bader, M. ; Dehner, C. ; Jüstel, D. ; Ntziachristos, V.

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

Opt. Lett. 46, 1-4 (2021)

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	Open Access Green

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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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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

ISSN (print) / ISBN 0146-9592

e-ISSN 1539-4794

Journal Optics Letters

Quellenangaben Volume: 46, Issue: 1, Pages: 1-4

Publisher Optical Society of America (OSA)

Publishing Place 2010 Massachusetts Ave Nw, Washington, Dc 20036 Usa

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Biological and Medical Imaging (IBMI)

Grants H2020 European Research Council