INVESTIGATION OF DIGESTIVE SYSTEM DISORDERS WITH ELECTROGASTROGRAM USING WAVELET TRANSFORM DENOISING

Gopu G.¹*, Neelaveni R.²*, Porkumaran K.³*, Shekar M.G.⁴*
¹Department of EEE, PSG College of Technology, Coimbatore- 04,Tamilnadu, India
²Department of EEE, PSG College of Technology, Coimbatore- 04,Tamilnadu, India
³Dr. N.G.P. Institute of Technology, Coimbatore, 48, Tamilnadu, India
⁴Department of Urology, SRM Hospital and Research Institute, Kattankulathur, Tamilnadu, India
* Corresponding Author : drmgshekarkumarah@yahoo.in

Received : -     Accepted : -     Published : 15-06-2010
Volume : 2     Issue : 1       Pages : 16 - 28
Int J Mach Intell 2.1 (2010):16-28
DOI : http://dx.doi.org/10.9735/0975-2927.2.1.16-28

Keywords : Electrogastrogram, Nausea, Dyspepsia, Vomiting, ulcer, Wavelet Transform, Welch power spectral Density Estimation
Conflict of Interest : None declared

A digestive system disorders are the very important problem in human being universally. As a panacea, a preliminary investigation method is proposed before the endoscopy procedure is called Electrogastrography. Electrogastrogram [EGG] is obtained from the human being cutaneously, which is noninvasive, easy procedure over endoscopy. EGG recorded for a 180 human being includes the normal individual and patients with digestive system disorder such us Nausea, Dyspepsia, Vomiting, ulcer, etc. A database is created for the analysis purpose. During the acquisition of EGG, the analog signal’s numeric values are recorded as .bio file format using the data scope. Wavelet transform is used for the analysis of EGG to find the deviation in frequency and Power from the power spectrum estimate plot obtained for disorders patients compare to normal Individual. Wavelet Transform analysis includes the principle component analysis, denosing of the signal and power spectrum estimation. In the proposed wavelet analysis, the data of a patient or normal individual is included for analysis. The EGG signal is reconstructed with a data obtained from the data scope. This signal undergoes principle component analysis to remove the noise in the EGG signal to obtain de-noised signal and it is plotted for power spectral density estimation with Welch power spectral Density Estimation. As a result of the proposed method the power variation is found to be a range of 40-52dB and frequency is detected as 0.06 Hz to 0.075Hz for ulcer patient 0.02 Hz to 0.04 Hz for dyspepsia patient and 0.05Hz to 0.058 Hz for Normal Individual. The above said finding supports the physician in the diagnosis of digestive system disorders at fair amount of accuracy.

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