國家衛生研究院 NHRI:Item 3990099045/1514
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/1514


    Title: Computed tomography sound velocity reconstruction using incomplete data
    Authors: Huang, SW;Li, PC
    Contributors: Division of Medical Engineering Research
    Abstract: An approach based on limited-angle transmission tomography for reconstruction of the sound velocity distribution in the breast is proposed. The imaging setup is similar to that of x-ray mammography. With this setup, the time-of-flight data are acquired by a linear array positioned at the top of the compressed breast that both transmits and receives, and a metal plate is placed at the bottom as a reflector. The setup allows acoustic data acquisition for simultaneous B-mode image formation and the tomographic sound velocity reconstruction. In order to improve the sound velocity estimation accuracy, a new reconstruction algorithm based on a convex programming formulation has been developed. Extensive simulations for both imaging and time-of-flight data based on a 5-MHz linear array were performed on tissues with different geometries and acoustic parameters. Results show that the sound velocity error was generally 1-3 m/s, with a maximum of 5.8 m/s. The radii of the objects under investigation varied from 2 to 6 mm, and all of them were detected successfully. Thus, the proposed approach has been shown to be both feasible and accurate. The approach can be used to complement conventional B-mode imaging to further enhance the detection of breast cancer.
    Keywords: Acoustics;Engineering, Electrical & Electronic
    Date: 2004-03
    Relation: IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control. 2004 Mar;51(3):329-342.
    Link to: http://ieeexplore.ieee.org/search/wrapper.jsp?arnumber=1320789
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0885-3010&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000220779900009
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=2342530481
    Appears in Collections:[Others] Periodical Articles

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