Angular spectrum method for curvilinear arrays: Theory and application to Fourier beamforming.
Angular spectrum method for curvilinear arrays: Theory and application to Fourier beamforming.
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用于医学超声成像的傅立叶波束形成技术在很大程度上局限于线性换能器阵列。这项工作将角谱方法扩展到曲线阵列，并展示了一种基于偏移的傅立叶波束形成技术，该技术对于腹部成像应用中的声速估计和分布式像差校正具有重要意义。与FIELD II模拟相比，该角谱方法模拟了从聚焦传输到归一化均方根误差在3.7%以内的压力场。然后使用活体腹部成像实例将所得到的傅里叶波束形成技术与虚拟源合成孔径进行比较，其中观察到分辨率和成像质量的改善。
Fourier beamforming techniques for medical ultrasound imaging have largely been limited to linear transducer arrays. This work extends the angular spectrum method to curvilinear arrays and demonstrates a migration-based Fourier beamforming technique that has implications for sound speed estimation and distributed aberration correction for abdominal imaging applications. When compared to Field II simulations, the proposed angular spectrum method simulates the pressure field from a focused transmission to within 3.7% normalized root mean square error. The resulting Fourier beamforming technique is then compared to virtual source synthetic aperture using in vivo abdominal imaging examples where resolution and imaging quality improvements are observed.