Now showing items 1-20 of 35

    • An anatomically accurate dielectric profile of the porcine kidney 

      Salahuddin, Saqib; La Gioia, Alessandra; Shahzad, Atif; Elahi, Muhammad Adnan; Kumar, Arun; Kilroy, David; Porter, Emily; O'Halloran, Martin (IOP Publishing, 2018-02-26)
      Microwave ablation is a promising treatment for kidney cancer. Accurate knowledge of the dielectric properties of biological tissues is vital for quantifying the safety, reliability and accuracy of ablation, among other ...
    • Anatomically and dielectrically realistic microwave head phantom with circulation and reconfigurable lesions 

      McDermott, Barry; Porter, Emily; Santorelli, Adam; Divilly, Brendan; Morris, Liam; Jones, Marggie; McGinley, Brian; O'Halloran, Martin (The Electromagnetics Academy, 2017)
      Phantoms provide valuable test platforms for developing medical devices. Solid materials in particular allow fabrication of stable and robust models. This paper presents a novel, anatomically realistic, multi-layered head ...
    • Brain haemorrhage detection using a SVM classifier with electrical impedance tomography measurement frames 

      McDermott, Barry; O'Halloran, Martin; Porter, Emily; Santorelli, Adam (Public Library of Science, 2018-07-12)
      Brain haemorrhages often require urgent treatment with a consequent need for quick and accurate diagnosis. Therefore, in this study, we investigate Support Vector Machine (SVM) classifiers for detecting brain haemorrhages ...
    • Challenges of post-measurement histology for the dielectric characterisation of heterogeneous biological tissues 

      La Gioia, Alessandra; O'Halloran, Martin; Porter, Emily (MDPI, 2020-06-09)
      The dielectric properties of biological tissues are typically measured using the open-ended coaxial probe technique, which is based on the assumption that the tissue sample is homogeneous. Therefore, for heterogeneous ...
    • Classification applied to brain haemorrhage detection: Initial phantom studies using electrical impedance measurements 

      McDermott, Barry; O'Halloran, Martin; Santorelli, Adam; McGinley, Brian; Porter, Emily (EIT2018, 2018-06-11)
      Machine learning and classification algorithms are applied to data collected from an EIT system. The system is used with an anatomically accurate head phantom setup in a variety of situations modelling normal and haemorrhagic ...
    • Comparison of radar-based microwave imaging algorithms applied to experimental breast phantoms 

      Elahi, Muhammad Adnan; Lavoie, B. R.; Porter, Emily; Glavin, Martin; Jones, E.; Fear, E. C.; O'Halloran, Martin (Union Radio-Scientifique Internationale, 2017-08-19)
      Microwave imaging is a promising imaging modality for the early detection of breast cancer. The two most important signal processing components of a radar-based microwave imaging system are the early-time artifact removal ...
    • Dielectric properties of bones: A potential indicator for osteoporosis 

      Amin, Bilal; Elahi, Muhammad Adnan; Porter, Emily; Shahzad, Atif; O'Halloran, Martin (National University of Ireland Galway, 2018-01-26)
      Osteoporosis is one of the major bone disease that results into bone fragility and fractures. Approximately 300,000 people over the age of 50 years suffer from osteoporosis in Ireland. Osteoporosis is mainly caused due ...
    • Early-stage dielectric characterisation of renal cell carcinoma for positive surgical margin detection 

      La Gioia, Alessandra; Elahi, Adnan; Bottiglieri, Anna; Istuk, Niko; Dowling, Catherine; D'Arcy, Frank; O'Halloran, Martin; Porter, Emily (Institute of Electrical and Electronics Engineers, 2019-03-31)
      Partial nephrectomy is preferred to total nephrectomy tor clinically localised renal cell carcinoma. In order to minimise the risk of local tumour recurrence after partial nephrectomy, ideally, the surgical margins of the ...
    • Effect of logarithmic and linear frequency scales on parametric modelling of tissue dielectric data 

      Salahuddin, Saqib; Porter, Emily; Meaney, Paul M.; O'Halloran, Martin (IOP Publishing, 2017-02-03)
      The dielectric properties of biological tissues have been studied widely over the past half-century. These properties are used in a vast array of applications, from determining the safety of wireless telecommunication ...
    • Effects of standard coagulant agents on the dielectric properties of fresh human blood 

      Salahuddin, Saqib; O'Halloran, Martin; Porter, Emily; Farrugia, Lourdes; Bonello, Julian; Sammut, Charles V.; Wismayer, P. Schembri (Institute of Electrical and Electronics Engineers, 2017-11-27)
      In this paper, the effects of coagulation and temperature on the dielectric properties of human blood are investigated over the frequency range of 400 MHz - 20 GHz using freshly extracted blood samples. The dielectric ...
    • Electrical impedance tomography with exploitation of symmetry 

      McDermott, Barry; Porter, Emily; Jones, Marggie; McGinley, Brian; O'Halloran, Martin (Bioengineering in Ireland 2018, 2018-01-26)
      Electrical Impedance Tomography (EIT) is an imaging technique involving an electrode array positioned around the area of interest. Alternating current is injected, and voltage measured, between electrode pairs in a prescribed ...
    • Examination of the sensing radius of open-ended coaxial probes in dielectric measurements of biological tissues 

      La Gioia, Alessandra; Porter, Emily; O'Halloran, Martin (Institute of Electrical and Electronics Engineers, 2017-07-09)
      A number of emerging electromagnetic diagnostic and therapeutic devices are designed based on estimates of benign and malignant tissue dielectric properties at different frequencies and temperatures. Accurate tissue ...
    • Gamma band neural stimulation in humans and the promise of a new modality to prevent and treat Alzheimer's disease 

      McDermott, Barry; Porter, Emily; Hughes, Diarmaid; McAuley, Brian; Lang, Mark; O'Halloran, Martin; Jones, Marggie (IOS Press, 2018-07-19)
      Existing treatments for Alzheimer s Disease have questionable efficacy with a need for research into new and more effective therapies to both treat and possibly prevent the condition. This review examines a novel therapeutic ...
    • Heparin as an anticoagulant for the dielectric measurement of blood 

      Dunne, Eoghan; O'Halloran, Martin; Porter, Emily; Bonello, Julian; Farrugia, Lourdes; Sammut, Charles V.; Schembri-Wismayer, Pierre (Institute of Electrical and Electronics Engineers, 2019-01-23)
      Testing blood ex-vivo allows physicians to gain an understanding of what is happening within the human body. Once blood is extracted from the body, it begins to clot. This process can affect the outcome of blood tests, ...
    • Image-based classification of bladder state using electrical impedance tomography 

      Dunne, Eoghan; Santorelli, Adam; McGinley, Brian; Leader, Geraldine; O'Halloran, Martin; Porter, Emily (IOP Publishing, 2018-12-03)
      Objective: In this study, we examine the potential of using machine learning classification to determine the bladder state ( not full , full ) with electrical impedance tomography (EIT) images of the pelvic region. Accurate ...
    • Impact of histology region size on measured dielectric properties of biological tissues 

      Porter, Emily; La Gioia, Alessandra; O'Halloran, Martin (Institute of Electrical and Electronics Engineers, 2017-05-22)
      Accurate knowledge of the dielectric properties of biological tissues is necessary for the design and development of electromagnetic medical technologies. Both electromagnetic diagnostic and therapeutic techniques depend ...
    • Impact of radial heterogeneities of biological tissues on dielectric measurements 

      La Gioia, Alessandra; Porter, Emily; Salahuddin, Saqib; O'Halloran, Martin (Curran Associates Proceedings, 2017-09-11)
      The dielectric properties of biological tissues are relevant in dosimetry studies and in radio-frequency and microwave medical applications. Broadband tissue dielectric data is commonly acquired using open-ended coaxial ...
    • Investigation of histology radius for dielectric characterisation of heterogeneous materials 

      La Gioia, Alessandra; O'Halloran, Martin; Elahi, Muhammad Adnan; Porter, Emily (Institute of Electrical and Electronics Engineers, 2018-07-13)
      Knowledge of the dielectric properties of biological tissues is fundamental in the design of novel electromagnetic-based medical devices. Tissue dielectric properties are typically measured using the open-ended coaxial ...
    • Investigation of histology region in dielectric measurements of heterogeneous tissues 

      Porter, Emily; O'Halloran, Martin (Institute of Electrical and Electronics Engineers (IEEE), 2017-08-17)
      The dielectric properties of tissues are the key parameters in electromagnetic medical technologies. Despite the apparent simplicity of the dielectric measurement process, reported data have been inconsistent for heterogeneous ...
    • An investigation of the variation of dielectric properties of ovine lung tissue with temperature 

      Bonello, Julian; Elahi, Muhammad Adnan; Porter, Emily; O'Halloran, Martin; Farrugia, Lourdes; Sammut, Charles V. (IOP Publishing, 2019-06-24)
      Presently, lung cancer is the leading cause of cancer deaths. Microwave thermal ablation is commonly used for the treatment of lung cancer. During microwave ablation treatment, changing temperatures (up to 100 °C) cause ...