使用虚拟源传输的声音速度的强大的成像
概括
虚拟源 (VS) 传输序列提高了信号噪声比 (SNR) 和音速 (SoS) 成像中的运动稳定性. 在临床超声波中,VS序列为软组织生物力学评估提供了卓越的SoS重建性能.
科学领域:
- 生物医学超声波 生物医学超声波
- 医疗成像医学成像
- 生物物理学的生物物理.
背景情况:
- 声速 (SoS) 成像为软组织生物力学提供了新的见解.
- 传统的超声波 (US) 系统具有单元 (SE) 分离波 (DW) 传输,其信号噪声比 (SNR) 有局限性.
- 现有的SoS成像方法可能会被光束成形不准确性所混,特别是在有运动的情况下.
研究的目的:
- 开发和评估用于SoS成像中增强SNR的新型传输序列.
- 引入一种代方法,用于精确的光束成形 (BF) SoS估计.
- 与传统方法相比,评估拟议序列的性能和运动稳定性.
主要方法:
- 实施Walsh-Hadamard (WH) 编码和虚拟源 (VS) 传输序列.
- 开发一种代束形SoS估计技术.
- 通过数值模拟,幻影实验和体内临床数据进行验证.
主要成果:
- WH 序列对运动工件的稳定性较差,显著增加了 SoS 根-平均平方误差 (RMSE).
- VS 序列表现出优越的 SoS 重建性能,并且对运动具有高度的稳定性.
- 在幻影研究中,VS在休息时显示了与SE相似的RMSE,但在移动时保持了性能,与WH不同.
- 与SE和WH相比,临床数据显示了较高的SNR和与VS序列的对比.
结论:
- 虚拟源 (VS) 传输序列代表了声音成像的运动稳定性和高SNR速度的重大进步.
- 拟议的代束成形方法提高了SoS重建的准确性.
- VS序列具有很大的潜力,可以改善软组织生物机械性质的临床评估.
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