Title :
Digital demodulator procedure for impedance mammography
Author :
Stelter, Jaroslaw ; Nowakowski, Antoni
Author_Institution :
Dept. of Med. & Ecological Electron., Tech. Univ. Gdansk, Poland
fDate :
31 Oct-3 Nov 1996
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;
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
DOI :
10.1109/IEMBS.1996.646331
