@InProceedings{SilvaCheFreEliGre:2004:ImFoVi,
               author = "Silva, Glauber T. and Chen, Shigao and Frery, Alejandro C. and 
                         Eliana Almeida, Mostafa Fatemi and Greenleaf, James F.",
          affiliation = "Universidade Federal de Alagoas, Dep. de Tecnologia da Informacao, 
                         57072-970 Maceio, AL -- Brasil",
                title = "Image Formation in Vibro-acoustography with Sector Array 
                         Transducers",
            booktitle = "Proceedings...",
                 year = "2004",
               editor = "Ara{\'u}jo, Arnaldo de Albuquerque and Comba, Jo{\~a}o Luiz Dihl 
                         and Navazo, Isabel and Sousa, Ant{\^o}nio Augusto de",
         organization = "Brazilian Symposium on Computer Graphics and Image Processing, 17. 
                         (SIBGRAPI) - Ibero-American Symposium on Computer Graphics, 2 
                         (SIACG)",
            publisher = "IEEE Computer Society",
              address = "Los Alamitos",
             keywords = "Vibro-acoustography, image formation, acoustic beamforming.",
             abstract = "This paper presents the image formation process in 
                         vibro-acoustography for systems based on sector array transducers. 
                         These transducers are an alternative to annular concave 
                         transducers. They represent an innovative technique deserving 
                         detailed assessment in vibro-acoustography applications. The 
                         system point-spread function (PSF) is defined in terms of the 
                         acoustic emission of a point-target in response to the dynamic 
                         ultrasound radiation force. This force is produced by two 
                         overlapping ultrasound beams. We calculate the radiation force on 
                         the target in a nonviscous fluid using the plane wave 
                         approximation for the ultrasound beams. The beamforming of sector 
                         array transducers is analyzed through linear acoustics. An 
                         expression for the velocity potential produced by sector arrays is 
                         derived, and the vibro-acoustography PSF is evaluated numerically. 
                         An experimental setup is design to validate the theory; the 
                         comparison is made using location and amplitude of sidelobes and 
                         spatial resolution defined by the PSF. Results show that the 
                         computed PSF is in full agreement with the PSF obtained 
                         experimentally.",
  conference-location = "Curitiba, PR, Brazil",
      conference-year = "17-20 Oct. 2004",
                  doi = "10.1109/SIBGRA.2004.1352939",
                  url = "http://dx.doi.org/10.1109/SIBGRA.2004.1352939",
             language = "en",
                  ibi = "6qtX3pFwXQZeBBx/Db8RA",
                  url = "http://urlib.net/ibi/6qtX3pFwXQZeBBx/Db8RA",
           targetfile = "4496_Silva_G.ps",
        urlaccessdate = "2024, Apr. 27"
}