Numerical Analysis on Cross-Shaped Array with Dynamic Transmit Focusing for Enhanced Volumetric Ultrasound ImagingReport as inadecuate


Numerical Analysis on Cross-Shaped Array with Dynamic Transmit Focusing for Enhanced Volumetric Ultrasound Imaging


Numerical Analysis on Cross-Shaped Array with Dynamic Transmit Focusing for Enhanced Volumetric Ultrasound Imaging - Download this document for free, or read online. Document in PDF available to download.

1

Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, USA

2

Department of Biomedical Engineering and Center for Marine-Integrated Biomedical Technology BK 21 Plus, Pukyong National University, Busan 48513, Korea





*

Author to whom correspondence should be addressed.



Academic Editor: Kohji Masuda

Abstract Volumetric ultrasound imaging has been primarily used as a clinical tool to diagnose cardiac dysfunction. However, the modality still suffers from system complexity due to a large number of receive channels for volumetric reconstruction. The aim of the study was to numerically assess a cross-shaped sparse array with a dynamic transmit focusing method to reduce the system complexity and to compensate for the image quality of unfocused volumetric imaging. Analytical simulations with two-way point spread functions demonstrated that the cross-shaped sparse array entailed up to an 84% increase in side-lobes up to 32 dB, thus leading to significant degradation of the point spread function in the diagonal plane. A dynamic transmit focusing method was able to vividly overcome the image degradation by transmitting more beams with tilting angles. This also yielded a comparable image sensitivity 65 dB to that of the full array when 31 × 31 tilted waves were used. The proposed cross-shaped sparse array with the dynamic transit focusing method can be used to enhance the frame rate as well as the image quality for unfocused ultrasound imaging. View Full-Text

Keywords: sparse array; point spread function; dynamic transmit focusing sparse array; point spread function; dynamic transmit focusing





Author: Suhyun Park 1 and Hyun Wook Kang 2,*

Source: http://mdpi.com/



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