page_title: Synthetic Aperture Ultrasound
hierarchical_section_title: Synthetic Aperture Ultrasound
caption_attribution_description: English: Example of 2-D Slices of 3-D Synthetic Aperture Ultrasound Imaging
context_page_description: Synthetic Aperture Ultrasound Imaging is an advanced form of imaging technology used to form high-resolution images in biomedical ultrasound systems. Ultrasound Imaging has become an important and popular medical imaging method, as it is safer and more economical than computer tomography and magnetic resonance imaging. Compared with the conventional ultrasound image formation where one transducer or linear array is used, SAU imaging has achieved higher lateral resolution and deeper penetration, which will enable a more accurate diagnosis in medical applications, with no obvious loss in frame rate and without a large burden in computational complexities.
  SAU is based on synthetic beamforming and focusing which are processes whereby the pulse-echo responses from individual pairs of elements are synthesized to reconstruct the formation and focusing, relying on the rule of linear super-position. The working principle of a basic SAU imaging system is one that transmits an ultrasound wave by each small group of all array elements in turn, receive a signal using all possible receive array units, and then reconstruct the image by weighted summation of all demodulated received recordings.
context_section_description: Synthetic Aperture Ultrasound (SAU) Imaging is an advanced form of imaging technology used to form high-resolution images in biomedical ultrasound systems. Ultrasound Imaging has become an important and popular medical imaging method, as it is safer and more economical than computer tomography (CT) and magnetic resonance imaging (MRI). Compared with the conventional ultrasound image formation where one transducer or linear array is used, SAU imaging has achieved higher lateral resolution and deeper penetration, which will enable a more accurate diagnosis in medical applications, with no obvious loss in frame rate and without a large burden in computational complexities.
  SAU is based on synthetic beamforming and focusing which are processes whereby the pulse-echo responses from individual pairs of elements are synthesized to reconstruct the formation and focusing, relying on the rule of linear super-position. The working principle of a basic SAU imaging system is one that transmits an ultrasound wave by each small group of all array elements in turn, receive a signal using all possible receive array units, and then reconstruct the image by weighted summation of all demodulated received recordings.
  The important advantage of SAU is its ability to achieve dynamic focusing at both transmission and reception without repeating the transmission process with all array elements for each focal zone, thus it saves large computational requirements for delay-and-sum beamforming and leaves space for increasing the frame rate. Also the single transmission and receiving requirement for each firing significantly reduces the hardware complexity for system implementations.
caption: Example of 2-D Slices of 3-D Synthetic Aperture Ultrasound Imaging From Field-II Simulation [1]
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