Title :
Improved minimum variance processing for UWB medical imaging applications
Author :
Jalilvand, Malyhe ; Xuyang Li ; Zwick, T.
Author_Institution :
IHE - Karlsruhe Inst. of Technol., Karlsruhe, Germany
fDate :
Oct. 31 2012-Nov. 2 2012
Abstract :
The performance of an ultra wideband minimum variance beamformer with an improved estimation of covariance matrix is presented and simulations are performed to evaluate the proposed processing unit. A model of average human head characteristic is simulated using UWB radar technique and images are reconstructed to detect an embedded stroke. Furthermore, since the accurate wave propagation speed in tissues is not possible to be calculated, the effect of speed estimation tolerances on the ultimate resolution and artifact level of the images are discussed.
Keywords :
array signal processing; biological tissues; covariance matrices; image reconstruction; image resolution; medical image processing; radar detection; radar imaging; radiowave propagation; ultra wideband radar; UWB medical imaging applications; UWB radar technique; average human head characteristic model; embedded stroke detection; image artifact level; image reconstruction; image resolution; improved minimum variance processing; speed estimation tolerance effect; tissues; ultrawideband minimum variance beamformer; wave propagation speed; Array signal processing; Brain modeling; Covariance matrix; Estimation; Image reconstruction; Imaging; Vectors; Ultra wideband; covariance matrix; medical imaging radar; minimum variance beamforming;
Conference_Titel :
Radar Conference (EuRAD), 2012 9th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2471-7
