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| Research on Improved FFT Algorithm in Frequency Domain Fully Focused Ultrasound Imaging |
| ZHOU Yinggang1,LIU Zhenxing2,LIANG Jingliang2,WANG Shanhui3,LI Jifeng1,WU Meina1 |
1. School of Information Science and Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China
2. Guizhou Power Grid Limited Liability Company Zunyi Power Supply Bureau,Zunyi, Guizhou 563000, China
3.School of Electrical and Automation Engineering, Liaoning University of Science and Technology, Benxi, Liaoning 117004, China |
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Abstract At present, time-domain ultrasonic imaging algorithms are commonly used for ultrasonic imaging detection of hole defects in steel blocks. The delay stacking process in the method requires repetitive and tedious iterative operations, which cannot meet the requirements of high-quality real-time imaging. The frequency domain ultrasound imaging algorithm has higher imaging resolution and faster imaging speed. A radix 2-FFT input hierarchical truncation algorithm for any non zero value input was proposed, and the algorithm was applied to the frequency domain FMC-PSM algorithm for imaging, resulting in an improved FMC-PSM algorithm for ultrasonic imaging of hole defects in steel blocks. The experimental results show that compared to the standard FMC-PSM algorithm, the improved frequency domain FMC-PSM algorithm can present higher quality images while increasing the imaging speed by 15%, which is expected to solve the problem of difficult balance between imaging quality and imaging efficiency in ultrasound imaging.
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Received: 26 July 2023
Published: 23 May 2024
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2024, Vol. 45 
