Browsing Electrical and Electronic Engineering (Conference Papers) by Author "O'Halloran, Martin"

Now showing items 1-20 of 22

    • Broadband dielectric properties of adrenal gland for accurate anatomical modelling in medical applications 

      Shahzad, Atif; Clausing, D.; Prakash, Punit; Dennedy, Michael C.; O'Halloran, Martin (IEEE, 2017-09-11)
      Dielectric properties of biological tissue are important in safety assessment and evaluation of novel medical imaging and therapeutic devices. This paper reports frequency dependent dielectric properties of adrenal tissue, ...

    • 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 coaxial open-ended probe based dielectric measurements on ex-vivo thermally ablated liver tissue 

      Ruvio, Giuseppe; Farina, Laura; Bottiglieri, Anna; Eaton-Evans, Jimmy; Elahi, Muhamad Ednan; O'Halloran, Martin; Pinto, Rosanna; Lopresto, Vanni; Cavagnaro, Marta (Institute of Electrical and Electronics Engineers, 2019-03-31)
      This paper compares an in-house dielectric properties measurement system based on the "Stuchly and Stuchly" method with the broadly commercialised Keysight setup and existing literature for the characterization of ablated ...

    • Comparison of in-vivo and ex-vivo dielectric properties of biological tissues 

      Salahuddin, Saqib; La Gioia, Alessandra; Elahi, Muhammad Adnan; O'Halloran, Martin; Shahzad, Atif (Curran Associates Proceedings, 2017-09-11)
      Accurate knowledge of the dielectric properties of biological tissues are crucial for various applications such as assessment of specific absorption rate and safety of electromagnetic medical devices. Most of the ...

    • 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 ...

    • 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 ...

    • Experimental evaluation of the effective ablation zone on ex-vivo bovine liver samples 

      Bottiglieri, Anna; Elahi, Adnan; Shahzad, Atif; Donlon, Padraig T.; Dennedy, Michael C.; O'Halloran, Martin (IEEE, 2018-09-10)
      Microwave thermal ablation is under investigation for minimally invasive treatments. In the cases of small targets, such as adrenal glands, microwave thermal ablation is a valuable alternative to the traditional and ...

    • 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 ...

    • An insight into bone dielectric properties variation: a foundation for electromagnetic medical devices 

      Amin, Bilal; Elahi, Muhammad Adnan; Shahzad, Atif; Parle, Eoin; McNamara, Laoise; O'Halloran, Martin (Institute of Electrical and Electronics Engineers, 2018-09-10)
      Dielectric properties of bones have recently got significant attention to monitor bone quality. This paper reports in-vitro dielectric properties of human trabecular bone samples obtained from osteoporotic and osteoarthritic ...

    • Investigating human bone microarchitecture and dielectric properties in microwave frequency range 

      Amin, Bilal; Shahzad, Atif; Farina, Laura; Parle, Eoin; McNamara, Laoise; O'Halloran, Martin; Elahi, Muhammad Adnan (Institute of Electrical and Electronics Engineers, 2019-03-31)
      Dielectric properties of bones are proposed to monitor bone quality. However, no study has investigated the relationship between bone dielectric properties and microarchitecture of bone, which is of paramount importance ...

    • Microwave bone imaging: experimental evaluation of calcaneus bone phantom and imaging prototype 

      Amin, Bilal; Sheridan, Colin; Kelly, Daniel; O'Halloran, Martin; Elahi, Muhammad Adnan (Institute of Electrical and Electronics Engineers, 2020-12-14)
      Microwave imaging (MWI) can be used as an alternate imaging modality for monitoring bone health. Evaluation and characterization of MWI prototype is a precursor step before in vivo investigation of bone dielectric ...

    • Microwave calcaneus phantom for bone imaging applications 

      Amin, Bilal; Kelly, Daniel; Shahzad, Atif; O'Halloran, Martin; Elahi, Muhammad Adnan (Institute of Electrical and Electronics Engineers, 2020-03-15)
      Microwave imaging can be used as an alternate modality for monitoring bone health. Dielectrically accurate, anthropomorphic phantoms play vital role in testing of imaging prototype prior to clinical applications. However, ...

    • Microwave thermal ablation: focusing energy in target tissue using fat layer 

      Bottiglieri, Anna; Farina, Laura; Shahzad, Atif; O'Loughlin, Declan; O'Halloran, Martin; Elahi, Muhammad Adnan (Institute of Electrical and Electronics Engineers, 2019-03-31)
      Microwave thermal ablation therapy is a minimally invasive technique introduced in the interventional oncology practice to treat a range of cancerous pathologies. Whereas satisfying results are obtained with the treatment ...

    • A novel tissue-mimicking material for phantom development in medical applications of EIT 

      McDermott, Barry; Porter, Emily; Jones, Marggie; McGinley, Brian; O'Halloran, Martin (EIT2017, 2017-06-21)
      A solid Tissue-Mimicking Material (TMM) with adjustable conductivity properties, which can be matched to those of biological tissue, is presented. TMM models of breast fat and gland matching the conductivity of real tissue ...

    • Realistic 3D finite element mesh of the adult human pelvis for electrical impedance tomography 

      Dunne, Eoghan; Porter, Emily; McGinley, Brian; O'Halloran, Martin (Zenodo, 2017-06-21)
      The finite element method is a numerical technique used to solve forward models for electrical impedance tomography. To date, realistic finite element models (FEMs) have been created for the head and thorax, but pelvic ...

    • Sensing radius of an open-ended coaxial probe for dielectric measurement of tissues: Calculation with relative permittivity versus conductivity 

      La Gioia, Alessandra; O'Halloran, Martin; Porter, Emily (Institute of Electrical and Electronics Engineers, 2019-03-09)
      The dielectric properties of biological tissues are important parameters used in the design and optimisation of electromagnetic-based medical technologies. Typically, these parameters are measured ex-vivo using the open-ended ...