Microwave-induced thermal imaging of tissue dielectric properties.
A new imaging method, microwave-induced thermal imaging (MITI), was developed to differentiate tissue based on thermal and dielectric properties. Image contrast depends on temporal strain in tissue, which was determined by one-dimensional speckle tracking using a phase-sensitive, correlation-based technique. The underlying mechanisms were analyzed and experimental results on biologic tissue agreed well with theoretical predictions. Because of its strong contrast between water-bearing and lipid-bearing tissue, the technique may enhance existing intravascular ultrasound (IVUS) imaging systems to identify vulnerable arterial plaque.
Shi
Y
Y
Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109-2099, USA.
Witte
R S
RS
Milas
S M
SM
Neiss
J H
JH
Chen
X C
XC
Cain
C A
CA
O'Donnell
M
M
D000273:Adipose Tissue / Q000000981:diagnostic imaging; D000465:Algorithms; D000818:Animals; D004867:Equipment Design; D008099:Liver / Q000000981:diagnostic imaging; D008872:Microwaves; D051381:Rats; D018084:Ultrasonography, Interventional / Q000295:instrumentation*