Now showing items 1-8 of 8

    • The evaluation of a large-area hybrid photodiode for PET applications 

      Ott, RJ; White, L; Duxbury, D; Fowler, R; Herbert, D; Ramsden, D (ELSEVIER SCIENCE BV, 2003-11-01)
      A large-area hybrid photodiode interfaced to scintillating crystals is being evaluated to determine its application as part of a positron camera dedicated to imaging the breast, positron emission mammography (PEM). The ...
    • The high resolution gamma imager (HRGI): a CCD based camera for medical imaging 

      Lees, JE; Fraser, GW; Keay, A; Bassford, D; Ott, R; Ryder, W (ELSEVIER SCIENCE BV, 2003-11-01)
      We describe the High Resolution Gamma Imager (HRGI): a Charge Coupled Device (CCD) based camera for imaging small volumes of radionuclide uptake in tissues. The HRGI is a collimated, scintillator-coated, low cost, high ...
    • Investigation of scintillator coated CCDs for medical imaging 

      Lees, JE; Bassford, D; Fraser, GW; Monk, D; Early, M; Ott, RJ; Moody, I; Blackshaw, E; Perkins, AC (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-02)
      We describe the development of a scintillator-coated charge coupled device (CCD) based camera for imaging small volumes of radionuclide uptake in tissues. The high-resolution gamma imager (HRGI) is a collimated, ...
    • Performance characteristics of the novel PETRRA positron camera 

      Otta, RJ; Flower, M; Erlandsson, K; Reader, A; Duxbury, D; Bateman, J; Stephenson, R; Spill, E (ELSEVIER SCIENCE BV, 2002-01-21)
      The PETRRA positron camera consists of two 60 cm x 40 cm annihilation photon detectors mounted on a rotating gantry. Each detector contains large BaF2 scintillators interfaced to large area multiwire proportional chambers ...
    • Performance of the PETRRA positron camera: reduction of scatter and randoms 

      Ott, RJ; Flower, MA; Divoli, A; Binnie, D (ELSEVIER SCIENCE BV, 2003-11-01)
      The PETRRA positron camera consists of two 60 x 40 cm(2) detectors mounted on a rotating gantry. The detectors each contain 1 cm thick BaF2 crystals interfaced to a MWPC filled with tetrakis dimethylamino ethylene (TMAE) ...
    • The PETRRA positron camera: design, characterization and results of a physical evaluation 

      Divoli, A; Flower, MA; Erlandsson, K; Reader, AJ; Evans, N; Meriaux, S; Ott, RJ; Stephenson, R; Bateman, JE; Duxbury, DM; Spill, EJ (IOP PUBLISHING LTD, 2005-09-07)
      The PETRRA positron camera is a large-area (600 mm x 400 mm sensitive area) prototype system that has been developed through a collaboration between the Rutherford Appleton Laboratory and the Institute of Cancer Research/Royal ...
    • Scaling images using their background ratio. An application in statistical comparisons of images 

      Kalemis, A; Binnie, D; Bailey, DL; Flower, MA; Ott, RJ (IOP PUBLISHING LTD, 2003-06-07)
      Comparison of two medical images often requires image scaling as a preprocessing step. This is usually done with the scaling-to-the-mean or scaling-to-the-maximum techniques which, under certain circumstances, in quantitative ...
    • Statistical pixelwise inference models for planar data analysis: an application to gamma-camera uniformity monitoring 

      Kalemis, A; Bailey, DL; Flower, MA; Lord, SK; Ott, RJ (IOP PUBLISHING LTD, 2004-07-21)
      In this paper two tests based on statistical models are presented and used to assess, quantify and provide positional information of the existence of bias and/or variations between planar images acquired at different times ...