Real Time Ultrasound Elastography Based on Phase Shift
1 Department of Biomedical Engineering, Shenzhen University, Shenzhen 518060, China
2 NationalRegional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060, China
3 Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060, China
Abstract：Quasistatic ultrasound elastography is an imaging modality to track tissue motion from ultrasonic signals before and after compression to image tissue elasticity. In this study, we presented a framework combined with block matching algorithm (BMA) and phase shift method (PS) for displacement estimation. BMA was first applied to the radio frequency (RF) signals, the displacements obtained were then used as a prior estimates of the PS method to calculate a more precision axial displacements. The performance of the algorithm was evaluated with synthesis data, and the result showed that both SNRe and CNRe of our method were significantly higher than those of PSPE method. In the case of strain value at 2% and Poissons ratio 0.49, the SNRe of PSPE and new algorithm were 3.82 and 10.85, respectively. The proposed algorithm was further validated using both elasticity phantom data and clinical data. Results showed that our method was robust to relatively complex tissue motions. The proposed algorithm was also fast, which provides real time strain images.
孙瑞超1 唐亚男1 谢林培1 何丹妮1 陆敏华1,2,3*汪天富1,2,3陈思平1,2,3. 基于相移的实时超声弹性成像方法[J]. 中国生物医学工程学报, 2013, 32(3): 339-347.
SUN Rui Chao1 TANG Ya Nan1 XIE Lin Pei1 HE Dan Ni1 LU Min Hua1,2,3*. Real Time Ultrasound Elastography Based on Phase Shift. journal1, 2013, 32(3): 339-347.
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