مؤتمر
Contrast improvement by combining pulse inversion with EMD and EEMD
| العنوان: | Contrast improvement by combining pulse inversion with EMD and EEMD |
|---|---|
| المؤلفون: | Liao A.-H., Shen C.-C., Li P.-C. |
| المساهمون: | 國立臺灣科技大學電機工程系 |
| سنة النشر: | 2009 |
| المجموعة: | National Taiwan University of Science and Technology Repository (NTUSTR) / 台灣科技大學 |
| مصطلحات موضوعية: | Background noise, Contrast agent, Contrast imaging, Contrast-to-tissue ratio, Empirical mode decomposition, Ensemble empirical mode decomposition, Finite number, Fundamental bands, Hilbert Huang transforms, Image contrasts, Intrinsic modes, Micro-bubble, Nonlinear imaging, Pulse-inversion, Pulse-inversion technique, Second harmonics, Tissue signals, Ultrasound contrast imaging, Acoustic signal processing, Acoustic waves, Data flow analysis, Image processing, Ultrasonic applications, Ultrasonics, Underwater acoustics, Acoustic wave propagation |
| الوصف: | Ultrasound nonlinear contrast imaging often has limited contrast because acoustic wave propagation in tissue is also nonlinear. In this study, a new ultrasound contrast imaging method which combines pulse-inversion technique with empirical mode decomposition (EMD) and the ensemble empirical mode decomposition (EEMD) in Hilbert-Huang transform (HHT) is explored to enhance the contrast between bubbles and surrounding tissues. The EMD is a method associated with HHT that allows decomposition of the data into a finite number of intrinsic modes (IMF). EEMD method further utilizes the ensemble of IMF with added white noise to better differentiate the nonlinear microbubble signal from the nonlinear tissue signal. This hypothesis was tested on pulse-inversion (PI) nonlinear imaging. Our results showed that the contrast-to-tissue ratio (CTR) in the fundamental band and the second harmonic band was improved by 10.2 and 4.3 dB after EEMD. However, echoes from contrast agent areas after decomposition may vary from the original data. By extracting microbubble component and suppressing background noise, it is demonstrated both numerically and experimentally that the EEMD can noticeably improve image contrast. 穢2009 IEEE. |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| العلاقة: | 2009 IEEE International Ultrasonics Symposium, IUS 2009, Rome; http://ir.lib.ntust.edu.tw/handle/987654321/26749Test; http://ir.lib.ntust.edu.tw/bitstream/987654321/26749/-1/index.htmlTest |
| الإتاحة: | http://ir.lib.ntust.edu.tw/handle/987654321/26749Test http://ir.lib.ntust.edu.tw/bitstream/987654321/26749/-1/index.htmlTest |
| رقم الانضمام: | edsbas.D4F12A97 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |