Browsing College of Science by Author "Colgan, Niall"

Now showing items 1-5 of 5

    • Experimental and numerical assessment of MRI-induced temperature change and SAR distributions in phantoms 

      Colgan, Niall; Van der Putten, Wil; Tuohy, Brendan (Springer Verlag, 2017-06)
      During an MR procedure, most of the transmitted RF power is transformed into heat within the patient’s tissue and implants as a result of resistive losses which is referred to as the specific energy absorption rate (SAR) ...

    • Experimental assessment of clinical MRI-induced global SAR distributions in head phantoms 

      Blackwell, James; Oluniran, Gideon; Tuohy, Brendan; Destrade, Michel; Kraśny, Marcin Jan; Colgan, Niall (Elsevier, 2019-10-05)
      Accurate estimation of SAR is critical to safeguarding vulnerable patients who require an MRI procedure. The increased static field strength and RF duty cycle capabilities in modern MRI scanners mean that systems can easily ...

    • Experimental assessment of MRI-induced temperature change and SAR distributions in phantoms 

      Blackwell, J.; Van der Putten, Wil; Tuohy, Brendan; Colgan, Niall (NUI Galway, 2017-11-14)
      During an MR procedure, most of the transmitted RF power is transformed into heat within the patients’ tissue resulting from resistive losses, referred to as the specific energy absorption rate(SAR) (2). The EU standardisation ...

    • The Poynting effect 

      Zurlo, Giuseppe; Blackwell, James; Colgan, Niall; Destrade, Michel (American Association of Physics Teachers, 2020-11-19)
      Intuition suggests that twisting a cylinder will shorten it, but here it is shown that for a cylinder of an incompressible material, like rubber, twisting will always produce elongation.

    • Proton resonance frequency shift thermometry: A review of modern clinical practices 

      Blackwell, James; Kraśny, Marcin J.; O'Brien, Aoife; Ashkan, Keyoumars; Galligan, Josette; Destrade, Michel; Colgan, Niall (Wiley, 2020-11-20)
      Magnetic resonance imaging (MRI) has become a popular modality in guiding minimally invasive thermal therapies, due to its advanced, nonionizing, imaging capabilities and its ability to record changes in temperature. A ...