Broad-Band Noise Reduction using Least Mean Square (LMS)-Adaptive Line Enhancer (ALE) on Doppler Blood Flow Sound Signal

DANIEL SANTOSO, OYAS WAHYUNGGORO, PRAPTO NUGROHO

Sari


ABSTRAK

Haemorrhoidal artery ligation (HAL) adalah metode operasi wasir yang memiliki keunggulan rasa sakit minimal dan waktu pemulihan cepat. Prosedur HAL bergantung pada bunyi Doppler untuk menentukan letak arteri dalam liang anus. Derau yang tercampur dalam sinyal membuat dokter kesulitan mendengarkan bunyi Doppler yang menandakan letak arteri wasir. Adaptive line enhancer (ALE) dengan algoritma least mean square (LMS) digunakan dalam penelitian ini untuk mengurangi aras derau yang terkandung dalam sinyal bunyi Doppler aliran darah. Hasil simulasi menunjukkan parameter mean square error (MSE), signal to noise ratio (SNR), dan waktu eksekusi untuk berbagai orde tapis. Nilai maksimum power spectral density (PSD) sinyal yang masuk ke tapis -86 dB/Hz, kemudian turun menjadi -101 dB/Hz setelah lewat tapis. SNR tertinggi 40,03 dB didapat ketika orde tapis 16. Waktu eksekusi hampir tidak berubah meskipun orde filter dinaikkan.

Kata kunci: pengurangan derau, bunyi Doppler, ALE, LMS, HAL

 

ABSTRACT

Hemorrhoidal artery ligation (HAL) is one of surgical methods in treating hemorrhoids disease known for less pain and fast recovery. HAL procedure relies on the Doppler audible sound to locate arteries within rectal column. Noise interfering the signal of interest makes arteries detection becomes difficult task for the surgeon since signal and noise spectral overlaps. Adaptive line enhancer (ALE) with least mean square (LMS) algorithm is used in this study to reduce noise level contained in Doppler blood flow sound signal. The simulation results show the mean square error (MSE), signal to noise ratio (SNR), and execution time for different filter order. The maximum power spectral density (PSD) value of the noisy signal and filtered signal are -86 dB/Hz and -101 dB/Hz. respectively. The highest SNR of 40.03 dB is obtained when filter tap order is set to 16. However signal processing time remains almost unchanged as the filter tap order increased.

Keywords: noise reduction, Doppler sound, ALE, LMS, HAL


Kata Kunci


noise reduction; Doppler sound; ALE; LMS; HAL

Teks Lengkap:

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Referensi


Atkinson, P. (1975). A Fundamental Interpretation of Ultrasonic Doppler Velocimeter. Ultrasound in Medicine and Biology, 2, 107–111.

Dixit, S., & Nagaria, D. (2017). LMS Adaptive Filters for Noise Cancellation: A Review. International Journal of Electrical and Computer Engineering (IJECE), 7(5), 2520 - 2529.

Fish, P.J. (1991). Non-Stationary Broadening in Pulsed Doppler Spectrum Measurements. Ultrasound in Medicine and Biology, 17, 147–155.

Fotiadou, E., van Laar, J.O.E.H., and Oei S.G. et al. (2018). Enhancement of Low-Quality Fetal Electrocardiogram based on Time-Sequenced Adaptive Filtering. Medical & Biology Engineering & Computing, 56, 2313–2323.

Giamundo, P. (2016). Advantages and Limits of Hemorrhoidal Dearterialization in the Treatment of Symptomatic Hemorrhoids. World Journal of Gastrointestinal Surgery, 8(1), 1–4.

Haykin, S.O. (2014). Adaptive Filter Theory 5th ed, New York: Pearson.

Hoyuela, C., Carvajal, F., and Juvanny, M. et al. (2016). HAL-RAR (Doppler-Guided Haemorrhoid Artery Ligation with Recto-Anal Repair) is a Safe and Effective Procedure for Haemorrhoids. Results of a Prospective Study after Two-Years Follow-Up. International Journal of Surgery, 28, 39-44.

Iadanza, E. (2019). Clinical Engineering Handbook. London: Elsevier Science.

Ishida, K., Fujioka, T., & Endo, T. et al. (2016). Evaluation of Electromagnetic Fields in a Hospital for Safe Use of Electronic Medical Equipment. Journal of Medical Systems, 40(46), 1 - 11.

Krishnaswamy, S. and Muniraj, N. (2015). Application of Adaptive Line Enhancer with LMS to Separate Heart Sound Signal from Lung Sound Signal at Real Time. Research Journal of Applied Sciences, Engineering and Technology, 9(6), 448–453.

Lu, B. Y., Hsueh, C.M.L., and Hung H.W. et al. (2015). Auscultation on the Ambulance: A Case Study of Adaptive Filter Application for the Safety. Journal of Electrical Engineering, 3, 203–211.

Morinaga, K., Hasuda, K., and Ikeda, T. (1995). A Novel Therapy for Internal Haemorrhoids: Ligation of the Haemorrhoidal Artery with a Newly Devised Instrument (Moricorn) in conjunction with a Doppler Flowmeter. American Journal of Gastroenterology, 9, 610–613.

Mott, T., Latimer, K., and Edwards, C. (2018). Hemorrhoids: Diagnosis and Treatment Options. American Family Physician, 97(3), 172–179.

Potdar, R.M., Meshram, M., & Kumar, R. et al. (2015). Review of Adaptive Filter Algorithm and Process for Echo Cancellation. International Journal of Advanced Research in Electronics and Communication Engineering (IJARECE), 4(6), 1758 - 1761.

Rahman, M.S., Kim, Y., and Choi C. et al. (2017). A Comprehensive Adaptive Filter to Eliminate Baseline Wander from ECG Signals. 2017 International Conference on Information and Communication Technology Convergence (ICTC), (pp. 43-48).

Ratto, C. (2014). THD Doppler Procedure for Hemorrhoids: the Surgical Technique. Techniques in Coloproctology, 18, 291–298.

Razzaq, N., Sheikh S.A., and Salman, M. et al. (2016). An Intelligent Adaptive Filter for Elimination of Power Line Interference from High Resolution Electrocardiogram. IEEE Access, 4, 1676-1688.

Sanei, S., Lee, T.K.M, & Abolghasemi, V. (2012). A New Adaptive Line Enhancer Based on Singular Spectrum Analysis. IEEE Transactions on Biomedical Engineering, 59(2), 428 - 434.

Saxena, S., Jais, R., and Hota, M. K. (2019). Removal of Powerline Interference from ECG Signal using FIR, IIR, DWT and NLMS Adaptive Filter. 2019 International Conference on Communication and Signal Processing (ICCSP), (pp. 0012-0016).

Widrow, B. Glover Jr., J.R., and McCool, J.M. et al. (1976). Adaptive Noise Cancelling: Principles and Applications. Proceedings of the IEEE, 63(12), 1692 – 1716.




DOI: https://doi.org/10.26760/elkomika.v10i1.189

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