Digital demodulator procedure for impedance mammography

Author

Stelter, Jaroslaw ; Nowakowski, Antoni

Author_Institution

Dept. of Med. & Ecological Electron., Tech. Univ. Gdansk, Poland

Volume

5

fYear

1996

fDate

31 Oct-3 Nov 1996

Firstpage

1942

Abstract

This paper presents a method of digital demodulation applied to the 64-electrodes impedance mammograph constructed at the Technical University of Gdansk. The method, based on nonuniform sampling and Fourier analysis, provides fast demodulation with high precision. Using a low cost 12 b analog-to-digital converter the method allows the authors to obtain a 16 b accuracy of measurement. The influence of noise and low frequency modulation of the measured signal on the SNR of the voltmeter is also presented

Keywords

Fourier analysis; analogue-digital conversion; demodulation; electric impedance imaging; medical image processing; Technical University of Gdansk; analog-to-digital converter; digital demodulator procedure; impedance mammography; low frequency modulation; measured signal; measurement accuracy; medical diagnostic imaging; nonuniform sampling; voltmeter SNR; Analog-digital conversion; Costs; Demodulation; Frequency measurement; Frequency modulation; Impedance; Low-frequency noise; Mammography; Noise measurement; Nonuniform sampling;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE

Conference_Location

Amsterdam

Print_ISBN

0-7803-3811-1

Type

conf

DOI

10.1109/IEMBS.1996.646331

Filename

646331