https://scholars.lib.ntu.edu.tw/handle/123456789/310854
標題: | Computed tomography sound velocity reconstruction using incomplete data | 作者: | S.-W. Huang P.-C. Li PAI-CHI LI |
公開日期: | 三月-2004 | 卷: | 51 | 期: | 3 | 起(迄)頁: | 329-342 | 來源出版物: | IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control | 摘要: | 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-Hight 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. |
URI: | http://scholars.lib.ntu.edu.tw/handle/123456789/310854 | DOI: | 10.1109/tuffc.2004.1295413 | SDG/關鍵字: | Acoustic wave velocity; Algorithms; Biological organs; Computer simulation; Mammography; Medical imaging; Oncology; Tumors; Ultrasonic applications; X rays; Limited angle transmission tomography; Sound velocity reconstruction; X-ray mammography; Computerized tomography; algorithm; article; comparative study; echography; echomammography; evaluation; image processing; image quality; instrumentation; methodology; reproducibility; sensitivity and specificity; transducer; Algorithms; Image Processing, Computer-Assisted; Phantoms, Imaging; Reproducibility of Results; Sensitivity and Specificity; Transducers; Ultrasonography; Ultrasonography, Mammary |
顯示於: | 電機工程學系 |
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