Title :
Accuracy Evaluation of Ultrawideband Time Domain Systems for Microwave Imaging
Author :
Zeng, Xuezhi ; Fhager, Andreas ; Persson, Mikael ; Linner, Peter ; Zirath, Herbert
Author_Institution :
Dept. of Signals & Syst., Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
We perform a theoretical analysis of the measurement accuracy of ultrawideband time domain systems. The theory is tested on a specific ultrawideband system and the analytical estimates of measurement uncertainty are in good agreements with those obtained by means of simulations. The influence of the antennas and propagation effects on the measurement accuracy of time domain near field microwave imaging systems is discussed. As an interesting application, the required measurement accuracy for a breast cancer detection system is estimated by studying the effect of noise on the image reconstructions. The results suggest that the effects of measurement errors on the reconstructed images are small when the amplitude uncertainty and phase uncertainty of measured data are less than 1.5 dB and 15 degrees, respectively.
Keywords :
biomedical imaging; biomedical measurement; cancer; image reconstruction; measurement errors; measurement uncertainty; microwave imaging; microwave propagation; random noise; time-domain analysis; ultra wideband antennas; amplitude uncertainty; antenna effect; breast cancer detection system; image reconstruction; measurement accuracy; measurement errors; measurement uncertainty; noise effect estimation; phase uncertainty; propagation effects; time domain near field microwave imaging systems; ultrawideband time domain system accuracy evaluation; Antenna measurements; Image reconstruction; Microwave imaging; Microwave measurements; Noise; Time domain analysis; Biomedical imaging; measurement errors; microwave imaging; random noise; time domain measurements;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2164174
