Image & Signal Processing
Title : Feature Extraction of Wavelet Transform Coefficients for sEMG Classification
Authors : Tasawan Puttasakul, Manas Sangworasil, Takenobu Matsuura
Abstract—Considering the vast variety of EMG signal applications such as rehabilitation of people suffering from some mobility limitations, scientists have done much research on EMG control system. In this regard, feature extraction of EMG signal has been highly valued as a significant technique to extract the desired information of EMG signal and remove unnecessary parts. This proposed method is based on discrete wavelet transform (DWT). This method consists of 2 main processes; feature extraction and classification. Feature extraction is implemented from the EMG signals, and different level of wavelet decomposition (cA3, cD3, cD2 and cD1) using root mean square (RMS) and cepstrum coefficient (CC) . Then, the feature vector is classified based on decision functions obtained by PCA. Experimental results showed that our method using DWT can improve motion recognition accuracy compared to when using raw EMG signals.
Title : Compression Depth Estimation for CPR manikin Based on Accelerometers
Authors : Tasawan Puttasakul, Supatra Wannasuk, Manas Sangworasil
Abstract—CPR (Cardio-Pulmonary Resuscitation) is the most common method for cardiac arrest patients. In order to evaluate the effect of chest compressions accurately and increase survival rate, real time and accurate measurement of the depth of compressions is necessary. The aim of this paper is to estimate the chest compression depth during CPR. This method was based on two accelerometer, and built an experimental platform for monitoring compressions in real time. Accuracy and processing of compression depth evaluation are derived from the difference in signal from two acceleration using integral by trapezoidal techniques coding into a commercial embedded system called FiO board. The result showed that the dual accelerometer was accurate and monitoring in real time able to improve significantly the chest compression during CPR.
Title : Patient's ID Watermarking on Electrocardiogram Using Wavelet Transform
Authors : Tasawan Puttasakul, Latika Tieawwongsuwan, Manas Sangworasil
Abstract— A new method for embedding the patient's ID watermark into electrocardiogram (ECG). This proposed method is based on discrete wavelet transform (DWT). In order to obtain the robustness watermark in this system, high frequency wavelet coefficients of the transform ECG signal were selected. After the patient's ID watermark was embedded into the original ECG signal, the ECG signal is no distortion which is an essential requirement for bio-medical data. In experimental result, the robust level of this proposed algorithm to many attack operations, such as an Additive White Gaussian Noise (AWGN), up sampling and down sampling data, low-pass filtering and high-pass filtering. The obtained of percent root mean square (PRD) is less than 1% and normalized correlation (NC) of patient's ID binary image is more than 0.99.
Title : Digital medical images preparation system for PACS system archive
Authors : Kasidit Leelasakulmekiat, Tasawan Puttasakul, Manas Sangworasil
Abstract— The objective of this project was to design and construction of system to provide the medical digital images from fundus camera, ultrasound machine and X-Ray machine archive into PACS. This project adopted the principle of image processing to change the image format and structure information to comply with the standards of DICOM images for use in medical image communication and archive into PACS. The designed and constructed of digital image preparation for image archive into PACS system was composed of three main parts : 1) connection system to receive signals from the output part of medical imaging machines, 2) the part for improvement of format and structure of image information as standard DICOM and 3) the part for archiving and communication of medical images in PACS. The results of functional testing showed that the system can encode the medical image information into the form and structure as standard DICOM and can archive medical images in to PACS as the objectives of the project.
Title : A Study on the Design and Construction of a Control System for Infusion Pump
Authors : Tunyarat Lorcharoenrueang , Sansern Hayakwong , Nuchanart Suwanakham, Tasawan Puttasakul
Abstract— The objective of this project was to study on the design and construction of a control system for infusion pump. This project has adopted the principle of electronics and computer in medicine. The designed and constructed of a control system for infusion pump was composed of three main parts : 1) the input part is the part of infusion pump to send the signal to receive and transmit signal part, 2) the receive and transmit signal part using microcontroller program with arduino to send and receive the signal from infusion pump via serial Port and 3) the control and display part, the part to receive the signals from the receive and transmit signal part to display on a computer and can be controlled directly from the computer screen. The functional testing results of this system showed that the system can control and display the performance of the infusion pump on the computer screen and can record the user data in accordance with the objectives of the project.