Frequency Compounding for Ultrasound Freehand Elastography
Ultrasound elastography is the technique of obtainingthe tissue relative stiffness information, which plays an importantrole in early diagnosis. Conventional elastography computes thestrain from the gradient of the displacement estimates betweengated pre-and post-compression echo signals. Althoughelastography has been proven to be a potential diagnosis tool forbreast/prostate tumor, vascular stiffening and hepatocirrhosisdiseases, the application of frequency compounding inelastography to reduce coherent artifact of elastic imaging hasrarely been reported. In this paper, a new method calledTransmit-side Frequency Compounding for Elastography (TSEC)is proposed, which involves using weighted compounding ofdifferent frequency sub-elastograms. The sub-elastograms areformed from the corresponding probe center frequency echosignal pairs reflected from the tissue ROI. Due to the frequencydependent reflection process, these sub-elastograms should havedifferent speckle pattern. Upon compounding these sub-elastograms,the amount of speckle in the resultant strain imageis reduced. The effect of TSFC are investigated through phantomexperiments, which confirms the reduction in strain imageartifact is accomplished with no sacrifice of real-time ultrasonicimaging as well as a measurable improvement in SNRe and CNRe.
Yangjie Cheng Shaoguo Cui Dong C.Liu Paul Liu
Computer Science College, Sichuan University Chengdu, China Saset Healthcare Inc.Chengdu, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）