Ali Rehman, Dahl Jeremy
Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA.
Department of Radiology, Stanford University School of Medicine, Palo Alto, California 94304, USA
JASA Express Lett. 2022 May;2(5):052001. doi: 10.1121/10.0010536. Epub 2022 May 13.
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 abdominal imaging examples where resolution and imaging quality improvements are observed.
用于医学超声成像的傅里叶波束形成技术在很大程度上仅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里叶波束形成技术，该技术对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，所提出的角谱方法将聚焦传输的压力场模拟到归一化均方根误差在3.7%以内。然后，使用观察到分辨率和成像质量有所提高的腹部成像示例，将所得的傅里叶波束形成技术与虚拟源合成孔径进行比较。
