【摘要】 目的:为有效地抑制造影谐波成像中组织谐波的影响,探求一种基于编码脉冲技术的抑制方法。方法:提出一种基于编码脉冲技术的组织谐波抑制方法。该方法利用组织谐波的非线性满足一个多项式模型,而造影谐波中的微泡振动存在时间滞后,不满足此模型的特性,采取发射因子和接收因子对多项式模型贡献为零的性质,抑制了组织谐波的影响。结果:造影谐波成像中组织谐波得到了抑制。结论:通过理论分析和仿真实验,证实该方法可行。更多还原

【Abstract】 Objective: In order to suppress tissue harmonic in contrast harmonic imaging, a suppression method based on coded pulse technique is explored. Methods: A suppression method based on coded pulse technique is presented. The method use the characteristic: tissue harmonic satisfy a polynomial, but micro-bubble oscillation does not satisfy this polynomial because of time delay. So transmitting gain and receiving gain contribute zero to polynomial. Thus the tissue harmonic is removed. Results: The tissue harmonic is suppressed in contrast harmonic imaging. Conclusion: Theory analysis and simulation results show the method is right and feasible.更多还原