A Study on the Simulation of New Linear Transducer Based on the Ultrafast Ultrasonic Imaging Technology
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
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The ultrafast ultrasonic imaging technology based on the transmitting/receiving principle of plane wave has become a research hotspot in the ultrasonic field of international medicine. It is hopeful that the technology replaces the traditional focus scanning ultrasonic imaging technology to be widely used clinically. This paper not only verifies the significant improving effect of coherent compound imaging algorithm on plane wave imaging resolution through the simulation of Field II software, but also proposes a new hypothesis that the Non-Elevation-Focused Probe (NEFP) is more helpful in further improving the imaging effect of plane wave imaging technology compared to the traditional Elevation-Focused Probe (EFP). In order to verify this hypothesis, this paper makes a comparative analysis on the plane wave imaging effect of the two kinds of transducers with the mode of emissive acoustic beam by controlling the elevation direction of probe (perpendicular to the short side direction of array element orientation) through parameters simulation. Results indicate that the contrast ratio of NEFP probe of near field imaging is significantly enhanced compared to that of EFP probe. Imaging resolutions of both probes are reduced when scattered elements deviate from the center of elevation direction. But the resolution of NEFP probe declines less.
Key words: plane wave / ultrasonic probe / compound imaging / elevation focusing
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