title: Measurement of the complex permittivity of microbubbles using a cavity perturbation technique for contrast enhanced ultra-wideband breast cancer detection.
abstract: Measurements of the complex permittivity of various concentrations of microbubbles in ethylene glycol liquid phantom have been carried out. A cavity perturbation technique using custom rectangular waveguide cavities, which are sensitive to small changes in the permittivity of the perturber, has been employed. Three different frequencies within the ultra-wideband (UWB) frequency spectrum have been used for the experiments. The results show that the concentration of the air filled microbubbles required to achieve a dielectric contrast as little as 2% exceeds the recommended dosage used in clinical ultrasound applications, by more than two orders of magnitude.
authors.affiliation: School of Engineering, University of Greenwich, UK. o.ogunlade@gre.ac.uk
authors.forename: Olumide
authors.initials: O
authors.lastname: Ogunlade
authors.forename: Yifan
authors.initials: Y
authors.lastname: Chen
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Kosmas
mesh_terms: D000465:Algorithms; D001943:Breast Neoplasms / Q000175:diagnosis*; D003198:Computer Simulation; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D045423:Microbubbles