title: Acoustical cross-talk in row-column addressed 2-D transducer arrays for ultrasound imaging.
abstract: The acoustical cross-talk in row-column addressed 2-D transducer arrays for volumetric ultrasound imaging is investigated. Experimental results from a 2.7 MHz, λ/2-pitch capacitive micromachined ultrasonic transducer (CMUT) array with 62 rows and 62 columns are presented and analyzed in the frequency-wavenumber domain. The sources of cross-talk are identified and predicted theoretically. The nearest neighbor cross-talk is -23.9±3.7 dB when the array is used as a 1-D array with the rows functioning as both transmitters and receivers. In the row-column configuration, with the columns transmitting and the rows receiving, the cross-talk is reduced to -40.2±3.5 dB.
authors.affiliation: Department of Micro- and Nanotechnology, Technical University of Denmark, Building 345E, DK-2800 Kgs. Lyngby, Denmark. Electronic address: tlehr@nanotech.dtu.dk.
authors.forename: Thomas Lehrmann
authors.initials: TL
authors.lastname: Christiansen
authors.affiliation: Center for Fast Ultrasound Imaging, Department of Electrical Engineering, Technical University of Denmark, Building 349, DK-2800 Kgs. Lyngby, Denmark.
authors.forename: Jørgen Arendt
authors.initials: JA
authors.lastname: Jensen
authors.affiliation: Department of Micro- and Nanotechnology, Technical University of Denmark, Building 345E, DK-2800 Kgs. Lyngby, Denmark.
authors.forename: Erik Vilain
authors.initials: EV
authors.lastname: Thomsen
keywords: 2-D transducer array; CMUT; Cross-talk; Row–column; Volumetric ultrasound imaging