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http://dx.doi.org/10.7776/ASK.2022.41.5.525

Suppression of side lobe and grating lobe in ultrasound medical imaging system  

Jeong, Mok Kun (Department of Electronics Engineering, Daejin University)
Publication Information
The Journal of the Acoustical Society of Korea / v.41, no.5, 2022 , pp. 525-533 More about this Journal
Abstract
We propose an effective method for suppressing both side and grating lobes by applying 2-dimensional Fourier Transform to the received channel data during the receive focusing process of an ultrasound imaging system. When the signal from the image point is focused, the channel signals have the same DC value across the channels. However, even after echoes from outside an imaging point are focused, they are manifested as having different spatial frequencies depending on their incident angles. Therefore, after the receive focusing delay time is applied, 2-D Fourier Transform is performed on the time-channel data to separate the DC component and other frequency components in the spectral domain, and the weighting value is defined using the ratio of the two values. The side lobe and grating lobe were suppressed by multiplying the ultrasound image by a weighting value. Ultrasound images with a frequency of 5 MHz were simulated in a 64-channel linear array. The grating lobe appearing in the ultrasound image was completely removed by applying the proposed method. In addition, the side lobe was reduced and the lateral resolution was greatly increased. Results of computer simulation on a human organ mimicking image show that the proposed method can aid in better lesion diagnosis by increasing the image contrast.
Keywords
Ultrasound image; Side lobe; Grating lobe; 2 dimensional Fourier transform;
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1 Y. Paul, D. V. M. Barthez, R. Leveille, V. Peter, and D. V. M. Scrivani, "Side lobes and grating lobes artifacts in ultrasound imaging," Veterinary Radiology & Ultrasound, 38, 387-393 (1997).   DOI
2 O. T. Von Ramm and S. W. Smith, "Beam steering with linear arrays," IEEE transactions on biomedical engineering, 8, 438-452 (1983).
3 I. K. Holfort, F. Gran, and J. A. Jensen, "Broadband minimum variance beamforming for ultrasound imaging," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 56, 314-325 (2009).   DOI
4 F. Vignon and M. R. Burcher, "Capon beamforming in medical ultrasound imaging with focused beams," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 55, 619-628 (2008).   DOI
5 K. Kim, S. Park, J. Kim, S. B. Park, and M. H. Bae, "A fast minimum variance beamforming method using principal component analysis," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 61, 930-945 (2014).   DOI
6 M. K. Jeong and S. J. Kwon, "Estimation of side lobes in ultrasound imaging systems," Biomed Eng. Lett. 5, 229-239 (2015).   DOI
7 P. C. Li and M. L. Li, "Adaptive imaging using the generalized coherence factor," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 50, 128-141 (2003).   DOI
8 S. Bae and T. K. Song, "Methods for grating lobe suppression in ultrasound plane wave imaging," Applied Sciences, 8, 1881 (2018).   DOI
9 R. S. Shapiro, W. L. Simpson, D. L. Rausch, and H. C. Yeh, "Compound spatial sonography of the thyroid gland: evaluation of freedom from artifacts and of nodule conspicuity," Am. J. Roentgenol. 177, 1195-1198 (2001).   DOI
10 J. F. Synnevag, A. Austeng, and S. Holm, "Minimum variance adaptive beamforming applied to medical ultrasound imaging," Proc. IEEE Ultrasonics Symposium Conference, 1199-1202 (2005).
11 A. Macovski, Medical Imaging Systems (Englewood Cliffs, Prentice Hall, 1983), pp. 204-215.
12 M. K. Jeong, "A Fourier transform-based sidelobe suppression method in ultrasound imaging," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 47, 759-763 (2000).   DOI
13 J. A. Jensen and N. B. Svendsen, "Calculation of pressure fields from arbitrarily shaped, apodized, and excited ultrasound transducers," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 39, 262-267 (1992).   DOI
14 M. A. Lediju, G. E. Trahey, B. C. Byram, and J. J. Dahl, "Short-lag spatial coherence of backscattered echoes: imaging characteristics," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 58, 1377-1388 (2011).   DOI
15 J. F. Synnevag, C. I. Nilsen, and S. Holm, "Speckle statistics in adaptive beamforming," Proc. IEEE Ultrasonics Symposium Conference, 1545-1548 (2007).
16 F. J. Pompei and S. C. Wooh, "Phased array element shapes for suppressing grating lobes," J. Acoust. Soc. Am. 111, 2040-2048 (2002).   DOI
17 R. Entrekin, P. Jackson, J. R. Jago, and B. A. Porter, "Real time spatial compound imaging in breast ultrasound: technology and early clinical experience," Medicamundi, 43, 35-43 (1999).
18 S. J. Kwon and M. K. Jeong, "Estimation and suppression of side lobes in medical ultrasound imaging systems," Biomed Eng. Lett. 7, 31-43 (2017).   DOI
19 R. N. Bracewell, The Fourier Transform and Its Applications (McGraw-hill, New York, 1986), pp. 267-272.
20 M. K. Jeong and S. J. Kwon, "A new method for assessing the performance of signal processing filters in suppressing the side lobe level," Ultrasonography, 40, 289 (2021).   DOI
21 J. A. Jensen, Calculation of B-mode Image of Synthetic Kidney, https://field-ii.dk/?examples/kidney_example/kidney_example.html, (Last viewed September 6, 2022).