Parameter Scaling in Non-Linear Microwave Tomography
Paper i proceeding, 2012

Non-linear microwave tomographic imaging of the breast is a challenging computational problem. The breast is heterogeneous and contains several high-contrast and lossy regions, resulting in large differences in the measured signal levels. This implies that special care must be taken when the imaging problem is formulated. Under such conditions, microwave imaging systems will most often be considerably more sensitive to changes in the electromagnetic properties in certain regions of the breast. The result is that the parameters might not be reconstructed correctly in the less sensitive regions. In this paper, a method for obtaining a more uniform sensitivity throughout the breast is investigated. The method for obtaining uniform sensitivity throughout the imaging domain is a scaling of the parameters to be reconstructed. This scaling, based on the norms of the columns of the Jacobian, is also introduced as a measure of the sensitivity. The scaling of the parameters is shown to improve performance of the microwave imaging system when applied to reconstruction of images from 2-D simulated data and measurement data.

microwave imaging

preconditioning

sensitivity

Författare

P. D. Jensen

Danmarks Tekniske Universitet (DTU)

Tonny Rubaek

Danmarks Tekniske Universitet (DTU)

Oskar Talcoth

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Biomedicinsk elektromagnetik

J. J. Mohr

Danmarks Tekniske Universitet (DTU)

Neil R. Epstein

Thayer School of Engineering at Dartmouth

2012 Loughborough Antennas & Propagation Conference, Loughborough, United Kingdom, 12-13 November 2012

6403009

Styrkeområden

Livsvetenskaper och teknik

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/LAPC.2012.6403009

ISBN

978-1-4673-2220-1

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Senast uppdaterat

2018-02-28