dc.contributor.authorPramanik, Manojit
dc.date.accessioned2014-02-27T02:54:16Z
dc.date.available2014-02-27T02:54:16Z
dc.date.copyright2014en_US
dc.date.issued2014
dc.identifier.citationPramanik, M. (2014). Improving tangential resolution with a modified delay-and-sum reconstruction algorithm in photoacoustic and thermoacoustic tomography. Journal of the Optical Society of America A: Optics Image Science and Vision, 31(3), 621-627.en_US
dc.identifier.urihttp://hdl.handle.net/10220/18861
dc.description.abstractSpatial resolution in photoacoustic and thermoacoustic tomography is ultrasound transducer (detector) bandwidth limited. For a circular scanning geometry the axial (radial) resolution is not affected by the detector aperture, but the tangential (lateral) resolution is highly dependent on the aperture size, and it is also spatially varying (depending on the location relative to the scanning center). Several approaches have been reported to counter this problem by physically attaching a negative acoustic lens in front of the nonfocused transducer or by using virtual point detectors. Here, we have implemented a modified delay-and-sum reconstruction method, which takes into account the large aperture of the detector, leading to more than fivefold improvement in the tangential resolution in photoacoustic (and thermoacoustic) tomography. Three different types of numerical phantoms were used to validate our reconstruction method. It is also shown that we were able to preserve the shape of the reconstructed objects with the modified algorithm.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesJournal of the optical society of america A : optics image science and visionen_US
dc.rights© 2014 Optical Society of America. This paper was published in Journal of the Optical Society of America A: Optics Image Science and Vision and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI: [http://dx.doi.org/10.1364/JOSAA.31.000621]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en_US
dc.subjectDRNTU::Science::Biological sciences::Biomathematics
dc.titleImproving tangential resolution with a modified delay-and-sum reconstruction algorithm in photoacoustic and thermoacoustic tomographyen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.identifier.doihttp://dx.doi.org/10.1364/JOSAA.31.000621
dc.description.versionPublished versionen_US
dc.identifier.rims176145


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