Precise tracking of impulsive acoustic radiation force induced small displacements for shear wave speed estimation
文献类型：会议论文
| 作者 | Yang Shen; Feiyan Cai; Yang Xiao; Tao Ling; Chengzhi Zeng; Qiaofeng Jin; Ming Qian; Xin Liu; Hairong Zheng |
| 出版日期 | 2011 |
| 会议名称 | 2011 IEEE International Ultrasonics Symposium, IUS 2011 |
| 会议地点 | Orlando, FL, United states |
| 英文摘要 | Acoustic radiation force impulse (ARFI) imaging generates localized small displacements (typically less than 20 microns) in soft tissues and would induce shear waves. The shear wave speed (SWS), which is determined by the tissue elastic properties and can offer quantitative tissue stiffness, can be monitored from the displacement field. Therefore, precise tracking of small displacements is of great importance. At present, small displacements are commonly tracked by phase-shift estimation, such as Kasai's 1-D autocorrelation phase-shift method and Loupas' 2-D autocorrelation phase-shift algorithm. The goal of this study is to introduce a novel phase-shift based algorithm being able to track the small displacements (even smaller than sample distance) in a more precise and quick way. This new phase-shift algorithm was developed based on Hilbert Transform (HT) approach using adaptive gradient of the phase angle to track the information of phase-shifts. A comparison was performed among the introduced HT phase-shift method, Kasai's algorithm and Loupas' approach to check the performance, and the errors of estimated displacement were given for each different specified shift values between two successively ultrasound signals. The SWS was estimated by means of the lateral time to peak (LTTP) time-of-flight (TOF) method from the calculated ARFI displacement field. |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/3514]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 作者单位 | 2011 |
| 推荐引用方式 GB/T 7714 | Yang Shen,Feiyan Cai,Yang Xiao,et al. Precise tracking of impulsive acoustic radiation force induced small displacements for shear wave speed estimation[C]. 见:2011 IEEE International Ultrasonics Symposium, IUS 2011. Orlando, FL, United states. |
入库方式： OAI收割
来源：深圳先进技术研究院
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