Journal article
Accurate prediction of transmission through a lensed row-column addressed array
Center for Fast Ultrasound Imaging, UltraSound and Biomechanics, Department of Health Technology, Technical University of Denmark1
UltraSound and Biomechanics, Department of Health Technology, Technical University of Denmark2
Department of Health Technology, Technical University of Denmark3
Mems Applied Sensors Group, UltraSound and Biomechanics, Department of Health Technology, Technical University of Denmark4
University of Oslo5
Using a diverging lens on a row-column array (RCA) can increase the size of its volumetric image and thus significantly improve its clinical value. Here, a ray tracing method is presented to predict the position of the transmitted wave so that it can be used to make beamformed images. The usable transmitted field-of-view (FOV) is evaluated for a lensed 128 + 128 element RCA by comparing the theoretic prediction of the emitted wavefront position with three-dimensional (3D) finite element simulation of the emitted field.
The FOV of the array is found to be 122 ° ± 2 ° in the direction orthogonal to the emitting elements and 28.5°–51.2°, depending on depth and element position, for the direction lying along the element. Moreover, the proposed ray tracing method is compared with a simpler thin lens model, and it is shown that the improved accuracy of the proposed method can increase the usable transmitted FOV up to 25.1°.
Language: | English |
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Publisher: | Acoustical Society of America |
Year: | 2022 |
Pages: | 3207-3218 |
ISSN: | 15208524 , 01630962 and 00014966 |
Types: | Journal article |
DOI: | 10.1121/10.0010528 |
ORCIDs: | Øygard, Sigrid H. , Audoin, Mélanie , Thomsen, Erik V. , Stuart, Matthias B. and Jensen, Jørgen A. |