سامانه همایش‌ها TSTA | ثبت‌نام و ارسال مقاله کنفرانس‌ها و کنگره‌های ملی

Home / سی و دومین کنفرانس ملی و دهمین کنفرانس بین المللی مهندسی زیست پزشکی ایران

Grating Lobe Suppression in Sparse Coprime Array Ultrasound Imaging by Null Alignment

Authors :

Mina Ezati¹ Vahid AminNilii² Zahra Kavehvash³

1- دانشگاه صنعتی شریف 2- دانشگاه صنعتی شریف 3- دانشگاه صنعتی شریف

Keywords :

Synthetic transmit aperture،Grating Lobe Suppression،sub-array beamforming،Frame rate improvement

Abstract :

Synthetic Transmit Aperture (STA) ultrasound imaging achieves high resolution and contrast by employing all transducer elements for both transmission and reception, enabling two-way dynamic focusing. However, this comes at the cost of increased hardware complexity and reduced frame rates. Sparse array techniques have been explored to mitigate these limitations by reducing the number of active channels, and transmission events. In this work, we propose a Grating-Lobe Suppressed Array (GLSA) method that achieves superior contrast compared to conventional periodic and coprime sparse arrays, while also providing a wider field of view compared to approached based on micro-beamforming, which reduce digital receive channels by summing signals from grouped transducer elements. Experimental results validated the effectiveness of the proposed method in enhancing both contrast and field of view.