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2015 ; 5
(ä): 14047
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Feasibility of Using Wideband Microwave System for Non-Invasive Detection and
Monitoring of Pulmonary Oedema
#MMPMID26365299
Rezaeieh SA
; Zamani A
; Bialkowski KS
; Mahmoud A
; Abbosh AM
Sci Rep
2015[Sep]; 5
(ä): 14047
PMID26365299
show ga
Pulmonary oedema is a common manifestation of various fatal diseases that can be
caused by cardiac or non-cardiac syndromes. The accumulated fluid has a
considerably higher dielectric constant compared to lungs' tissues, and can thus
be detected using microwave techniques. Therefore, a non-invasive microwave
system for the early detection of pulmonary oedema is presented. It employs a
platform in the form of foam-based bed that contains two linear arrays of
wideband antennas covering the band 0.7-1?GHz. The platform is designed such that
during the tests, the subject lays on the bed with the back of the torso facing
the antenna arrays. The antennas are controlled using a switching network that is
connected to a compact network analyzer. A novel frequency-based imaging
algorithm is used to process the recorded signals and generate an image of the
torso showing any accumulated fluids in the lungs. The system is verified on an
artificial torso phantom, and animal organs. As a feasibility study, preclinical
tests are conducted on healthy subjects to determinate the type of obtained
images, the statistics and threshold levels of their intensity to differentiate
between healthy and unhealthy subjects.