Development of a compression algorithm suitable for exercise ECG data

2001-10-28
Uyar, K
Ider, YZ
Huge amount of data recorded during exercise electrocardiography may be stored for further analysis or be transferred to a remote physician through telephone lines. Due to channel limitations, data must be compressed prior to the transfer. In this study, an algorithm suitable for compression of exercise electrocardiography data is proposed. 2-D Discrete Cosine Transformation is applied in the algorithm to make use of the pseudo periodic behavior of the data. To increase the correlation, data is aligned from the R peaks. QRS detection is performed using Fast Dyadic Wavelet Transform. The success rate of the detection algorithm is found to be 99.78%. Uniform scalar quantization is used with zonal coding method in the coding of 2-D Discrete Cosine Transform coefficients. The performance of the compression algorithm is evaluated in terms of compression ratio, reconstruction error and by comparing the reports of the ST segment depression test applied before the compression and after the reconstruction to inspect whether vital information is preserved.

Suggestions

Design and implementation of labview based data acquisition and image reconstruction environment for Metu-mrı system
Özsüt, Murat Eşref; Eyüboğlu, Behçet Murat; Department of Electrical and Electronics Engineering (2005)
Data acquisition and image reconstruction tasks of METU Magnetic Resonance Imaging (MRI) System are used to be performed by a 15 year-old technology. This system is incapable of transmitting control signals simultaneously and has memory limitations. Control software is written mostly in assembly language, which is hard to modify, with very limited user interface functionality, and time consuming. In order to improve the system, a LabVIEW based data acquisition system consisting of a NI-6713 D/A card (to gen...
Implementation of a data acquisition system for contactless conductivity imaging
Ulker, B; Gençer, Nevzat Güneri (2002-09-01)
A data acquisition system is realized for conductivity imaging via contactless measurements. It is observed that field profiles are good representatives of the conductive objects scanned by the measurement system. Three different data sets are taken with different scanning resolutions. Note that although the scanning resolution is decreased 25 times, it is still possible to observe the conductive object. The data acquisition time is due to the data acquisition time limit of the lock-in amplifier. As might b...
Integration of Federated Medical Systems for Vendor Neutral Image Access in Teleradiology Applications
Yilmaz, Ayhan Ozan; Baykal, Nazife (2014-09-03)
This paper proposes a framework designed to interconnect medical imaging facilities and teleradiology service providers on a single access interface. This framework aims to solve the interoperability issues of Picture Archiving and Communication System (PACS), Radiology Information System (RIS) and Hospital Information System (HIS) developed by different vendors and enrich the digital health record delivered to non-local radiologists or physicians with the integrated information from several systems. This i...
Design of a novel low-loss frequency scanning antenna
Alkış, Sena; Ergül, Özgür Salih; Department of Electrical and Electronics Engineering (2019)
In antenna engineering, frequency scanning arrays are well-known with their ability to provide low-cost electronic scanning capability. However, in many studies on these arrays, the loss of the structure is overlooked. In this study, a novel low-loss frequency scanning antenna structure is proposed. The design is a composition of a feeding waveguide utilized for frequency scanning in one plane and an array of eight elements in the other plane, which is repeated along the frequency scanning axis. The loss of...
Design of a radio frequency identification (rfid) antenna
Kalaycı, Sefa; Birand, Mehmet Tuncay; Department of Electrical and Electronics Engineering (2009)
Fundamental features of Radio Frequency Identification (RFID) systems used in different application areas will be reviewed. Techniques used in realizing RFID antenna systems will be studied and the procedure to realize a specific RFID antenna type possessing desired characteristics will be described. Electrical properties such as radiation pattern, impedance will be predicted using analytical and/or computer simulation techniques. Experimental investigations will be carried out to complement the theoretical...
Citation Formats
K. Uyar and Y. Ider, “Development of a compression algorithm suitable for exercise ECG data,” 2001, vol. 23, p. 3521, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65532.