Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8129991 | Ultrasonics | 2018 | 10 Pages |
Abstract
The high frame rate (HFR) imaging method has the ability to achieve a high frame rate. In this method, only one transmission is required to construct a frame of image. In our previous work, using a moved one-dimensional (1D) array transducer, a three-dimensional (3D) ultrasound imaging method in frequency domain was developed. This imaging method was designed based on the concepts of array beam and synthetic aperture, which can simplify the two-dimensional (2D) array transducer. In this paper, based on array beam and synthetic aperture, the HFR imaging method is demonstrated from a novel view. From this view, the relationship between the HFR imaging method and synthetic aperture is established with the weighting function of array beam. Besides, the HFR imaging method, the imaging method with a moved 1D array transducer, and the synthetic aperture imaging method with a moved single element transducer are unified in the same analytical method with different weighting functions. The same frequency domain signal processing flow can be applied to these imaging methods. Comparisons to these imaging methods are implemented with simulations. Simulation results show that, in the imaging depth of 45â¯mm, the resolutions calculated as the total width of the â6â¯dB main lobe in x-direction are 1.099â¯mm, 1.056â¯mm and 0.596â¯mm for the methods with 1D transducer, 2D transducer and the single element transducer, respectively. The resolution in y-direction is 1.054â¯mm for the methods with 2D transducer, and 0.565â¯mm, 0.593â¯mm for the 1D and single element transducers, respectively. The resolutions in z-direction are 0.493â¯mm, 0.451â¯mm and 0.452â¯mm for the 2D, 1D and single element transducers, respectively. The resolution in the moved-direction is improved with a moved transducer, but the contrast of the image is decreased.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Acoustics and Ultrasonics
Authors
Zhihui Han, Hu Peng, Xiaoyan Zhao, Xun Chen,