Investigation of the feasability for 3D synthetic aperture imaging

Svetoslav Nikolov, Jørgen Arendt Jensen

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Abstract

This paper investigates the feasibility of implementing real-time synthetic aperture 3D imaging on the experimental system developed at the Center for Fast Ultrasound Imaging using a 2D transducer array. The target array is a fully populated 32 × 32 3 MHz array with a half wavelength pitch. The elements of the array are grouped in blocks of 16 × 8, which can simultaneously be accessed by the 128 channels of the scanner. Using 8-to-1 high-voltage analog multiplexors, any group of 16 × 8 elements can be accessed. Simulations are done using Field II using parameters from a 32 x 32 elements experimental array made by Vermon with a center frequency of 2.93 MHz, fractional bandwidth of 58 %, and a pitch of 300 µm. The simulations show, that using all of the 128 elements a spherical wave within ±50 degrees sector can be created. The level of the edge waves is reduced by applying apodization with an elliptic footprint. The results of simulations show that the angular resolution at -6dB is 2.7 degrees, and is determined by the distance between the outer-most transmit elements. The peak gratinglobe levels are −23.5, −25, 27.2, −44.5 dB below the main peak for 64, 100, 144, and 169 transmit events, respectively. The number of scanned volumes per second for these cases are 78, 50, 34 and 30, respectively.
Original languageEnglish
Title of host publicationProceedings of 2003 IEEE Symposium on Ultrasonics
Volume2
PublisherIEEE
Publication date2003
Pages1903-1906
ISBN (Print)0-7803-7922-5
DOIs
Publication statusPublished - 2003
Event2003 IEEE International Ulstrasonics Symposium - Honolulu, HI, United States
Duration: 5 Oct 20038 Oct 2003
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9075

Conference

Conference2003 IEEE International Ulstrasonics Symposium
CountryUnited States
CityHonolulu, HI
Period05/10/200308/10/2003
Internet address
SeriesI E E E International Ultrasonics Symposium. Proceedings
ISSN1051-0117

Bibliographical note

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