Now showing items 1-4 of 4

    • Absolute temperature monitoring using RF radiometry in the MRI scanner 

      El-Sharkawy, A.-M. M.; Sotiriadis, P. P.; Bottomley, P. A.; Atalar, Ergin (Institute of Electrical and Electronics Engineers, 2006)
      Temperature detection using microwave radiometry has proven value for noninvasively measuring the absolute temperature of tissues inside the body. However, current clinical radiometers operate in the gigahertz range, which ...
    • Interventional MRI: tapering improves the distal sensitivity of the loopless antenna 

      Qian, D.; El-Sharkawy, A. M. M.; Atalar, Ergin; Bottomley, P. A. (Wiley, 2010)
      The "loopless antenna" is an interventional MRI detector consisting of a tuned coaxial cable and an extended inner conductor or "whip". A limitation is the poor sensitivity afforded at, and immediately proximal to, its ...
    • Monitoring and correcting spatio-temporal variations of the MR scanner’s static magnetic field 

      El-Sharkawy, A. M.; Schär, M.; Bottomley, P. A.; Atalar, Ergin (Springer, 2006)
      The homogeneity and stability of the static magnetic field are of paramount importance to the accuracy of MR procedures that are sensitive to phase errors and magnetic field inhomogeneity. It is shown that intense gradient ...
    • RF radiometery sensor sensitivity and detection profile 

      El-Sharkawy, A.-M.M.; Sotiriadis, P. P.; Bottomley, P. A.; Atalar, Ergin (IEEE, 2008-11)
      Temperature sensing using microwave radiometry has proven value for non-invasively measuring the absolute temperature of tissues inside the human body. However, current clinical radiometers operate in GHz or infrared ...