title: Compressive sampling for time critical microwave imaging applications.
abstract: Across all biomedical imaging applications, there is a growing emphasis placed on reducing data acquisition and imaging times. This research explores the use of a technique, known as compressive sampling or compressed sensing (CS), as an efficient technique to minimise the data acquisition time for time critical microwave imaging (MWI) applications. Where a signal exhibits sparsity in the time domain, the proposed CS implementation allows for sub-sampling acquisition in the frequency domain and consequently shorter imaging times, albeit at the expense of a slight degradation in reconstruction quality of the signals as the compression increases. This Letter focuses on ultra wideband (UWB) radar MWI applications where reducing acquisition is of critical importance therefore a slight degradation in reconstruction quality may be acceptable. The analysis demonstrates the effectiveness and suitability of CS with UWB applications.
authors.affiliation: College of Engineering and Informatics , National University of Ireland Galway , University Road , Galway , Ireland.
authors.forename: Darren
authors.initials: D
authors.lastname: Craven
authors.affiliation: College of Engineering and Informatics , National University of Ireland Galway , University Road , Galway , Ireland.
authors.forename: Martin
authors.initials: M
authors.lastname: O'Halloran
authors.affiliation: College of Engineering and Informatics , National University of Ireland Galway , University Road , Galway , Ireland.
authors.forename: Brian
authors.initials: B
authors.lastname: McGinley
authors.affiliation: Faculdade de Ciencias , Universidade de Lisboa , Instituto de Biofisica e Engenharia Biomedica , Lisbon , Portugal.
authors.forename: Raquel C
authors.initials: RC
authors.lastname: Conceicao
authors.affiliation: College of Engineering and Informatics , National University of Ireland Galway , University Road , Galway , Ireland.
authors.forename: Liam
authors.initials: L
authors.lastname: Kilmartin
authors.affiliation: College of Engineering and Informatics , National University of Ireland Galway , University Road , Galway , Ireland.
authors.forename: Edward
authors.initials: E
authors.lastname: Jones
authors.affiliation: College of Engineering and Informatics , National University of Ireland Galway , University Road , Galway , Ireland.
authors.forename: Martin
authors.initials: M
authors.lastname: Glavin
keywords: biomedical imaging; compressed sensing; compressive sampling; data acquisition; data acquisition time; imaging time; microwave imaging; reconstruction quality; subsampling acquisition; time critical microwave imaging