Examination of the phase and log magnitude measurement projections and the implications for tomographic image reconstruction behavior
Paper i proceeding, 2017

We examine the log magnitude and phase projections of simple circular objects in a 2D microwave tomography setting. Because of the inherent insight visible with these log transformed quantities, we can explore the forward and associated inverse scattering characteristics. For these situations, it is clear that the reconstructions for the cases where the target properties are higher than that of the background take more iterations and the convergence behavior is more uneven. Interestingly this corresponds to the situation where the composite pattern from the antenna/target combination produces a crudely focused beam with corresponding side nulls and lobes. We speculate that these features are somewhat confounding and ultimately prove more challenging for the reconstruction algorithm than for when the target properties are less than the background.

phase

log transformation

breast

target contrast

lensing

microwave imaging

magnitude

projection

Författare

Paul M Meaney

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

Samar Hosseinzadegan

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

Andreas Fhager

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

Mikael Persson

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

2017 1st IEEE MTT-S International Microwave Bio Conference, IMBioC 2017

7965779

Ämneskategorier

Medicinsk bildbehandling

DOI

10.1109/IMBIOC.2017.7965779

ISBN

978-1-5386-1713-7