Preliminary results in display and abnormality recognition of Hilbert transformed e.c.g.s
Tóm tắt
An application of the Discrete Hilbert Transform (d.h.t.) in the area of e.c.g. display and analysis is presented. The implementation of the Hilbert Transform is discussed and a comparison of the resulting display is made with that obtained when displaying vectorcardiograms. Other features of d.h.t. e.c.g.s are also presented and in this instance two techniques for pattern recognition of abnormalities are mentioned. The first deals with overall features of the individual e.c.g. beats and is probability based. The second technique is more concerned with the beat to beat variations in the e.c.g. and is more syntactic in nature. A comparison of the techniques is given along with computer generated results.
Tài liệu tham khảo
Katona, P. G. (1976) Principles of biomedical information processing.In Handbook of Engineering in Medicine and Biology Fleming, D. G. andFeinburg, B. N. (Eds.) CRC Press, Cleveland, USA.
Chik, L., Sokol, R. J. andStojkov, B. S. (1976) Computer data acquisition—patient monitoring.In Handbook of Engineering in Medicine and Biology,Fleming,D. G. andFeinburg,B. N. (Eds.) CRC Press, Cleveland, USA.
Cacares, C. A. andDreifus, L. S. (Eds.) (1974)Clinical Electrocardiography and Computers, Academic Press, New York.
Belaforte, G., De Mori, R. andFerraris, F. (1979) A contribution to the automatic processing of electrocardiograms using syntactic methods.IEEE Trans.,BME-26.
Murthy, I. S. N., Rangaraj, M. R., Udupa, K. J. andGoyal, A. K. (1979) Homomorphic analysis and modelling of ECG Signals.IEEE Trans.,BME-26.
Murthy, I. S. N. andRangaraj, M. R. (1979) New concepts for PVC detection.IEEE Trans.,BME-26.
Rush, S. andLepeschkin, E. (Eds) (1974) Body surface mapping of cardiac fields.Advances in Cardiology, Vol. 10, Karger, Basel.
Dugundji, J. (1958) Envelopes and pre-envelopes of real waveforms.IRE Trans. Inform. Theory, IT-9.
Singleton, R. C. (1969) An algorithm for computing the mixed radix fast Fourier transform.IEEE Trans.,AU-17.
Gold, B., Oppenheim, A. V. andRader, C. M. (1970) Theory and implementation of the discrete Hilbert transform.Proc. Symp. Comput. Process. Commun., Polytech Press, Brooklyn.
Christensen, R. A. andHirschman, A. D. (1976) An automatic phase alignment for the Karhunen-Loeve Expansion.IEEE Trans.,BME-26.
Meisel, W. S. (1972) Computer-oriented Approaches to Pattern Recognition. Ist edition. Academic Press, New York.