A Olivo

Summary

Affiliation: University College London
Country: UK

Publications

  1. ncbi Modelling of a novel x-ray phase contrast imaging technique based on coded apertures
    A Olivo
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, UK
    Phys Med Biol 52:6555-73. 2007
  2. ncbi Assessing the validity of modulation transfer function evaluation techniques with application to small area and scanned digital detectors
    B D Price
    Department of Medical Physics and Bioengineering, University College London, London, United Kingdom
    Rev Sci Instrum 79:113103. 2008
  3. ncbi Experimental validation of a simple model capable of predicting the phase contrast imaging capabilities of any x-ray imaging system
    A Olivo
    Department of Medical Physics and Bioengineering, University College of London, Malet Place, Gower Street, London WC1E 6BT, UK
    Phys Med Biol 51:3015-30. 2006
  4. ncbi Image formation principles in coded-aperture based x-ray phase contrast imaging
    A Olivo
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, UK
    Phys Med Biol 53:6461-74. 2008
  5. ncbi Deconvolution of x-ray phase contrast images as a way to retrieve phase information lost due to insufficient resolution
    A Olivo
    Department of Medical Physics and Bioengineering, UCL, London, UK
    Phys Med Biol 54:N347-54. 2009
  6. ncbi Phase contrast imaging of breast tumours with synchrotron radiation
    A Olivo
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, UK
    Appl Radiat Isot 67:1033-41. 2009
  7. ncbi Signal and noise transfer properties of CMOS based active pixel flat panel imager coupled to structured CsI:Tl
    C D Arvanitis
    Department of Medical Physics and Bioengineering, University College London, London WC1E 6BT, United Kingdom
    Med Phys 36:116-26. 2009
  8. ncbi Effects of signal diffusion on x-ray phase contrast images
    K Ignatyev
    Department of Medical Physics and Bioengineering, UCL, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Rev Sci Instrum 82:073702. 2011
  9. ncbi The effects of the imaging system on the validity limits of the ray-optical approach to phase contrast imaging
    A Peterzol
    Dipartimento di Fisica, Università di Trieste e INFN, Sezione di Trieste, Via Valerio 2, 34100 Trieste, Italy
    Med Phys 32:3617-27. 2005
  10. ncbi Preliminary study on extremely small angle x-ray scatter imaging with synchrotron radiation
    A Olivo
    Dipartimento di Fisica, , Italy
    Phys Med Biol 47:469-80. 2002

Collaborators

Detail Information

Publications12

  1. ncbi Modelling of a novel x-ray phase contrast imaging technique based on coded apertures
    A Olivo
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, UK
    Phys Med Biol 52:6555-73. 2007
    ..The model has been experimentally validated and a section of the paper shows the comparison between simulated and experimental results...
  2. ncbi Assessing the validity of modulation transfer function evaluation techniques with application to small area and scanned digital detectors
    B D Price
    Department of Medical Physics and Bioengineering, University College London, London, United Kingdom
    Rev Sci Instrum 79:113103. 2008
    ..It was also found that use of such a step and shoot technique does cause a very small overall degradation in resolution. The resolution of overall images was calculated to be 0.1 lp/mm lower than that of the individual images acquired...
  3. ncbi Experimental validation of a simple model capable of predicting the phase contrast imaging capabilities of any x-ray imaging system
    A Olivo
    Department of Medical Physics and Bioengineering, University College of London, Malet Place, Gower Street, London WC1E 6BT, UK
    Phys Med Biol 51:3015-30. 2006
    ..This is an important step in the wider application of PC using conventional sources...
  4. ncbi Image formation principles in coded-aperture based x-ray phase contrast imaging
    A Olivo
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, UK
    Phys Med Biol 53:6461-74. 2008
    ....
  5. ncbi Deconvolution of x-ray phase contrast images as a way to retrieve phase information lost due to insufficient resolution
    A Olivo
    Department of Medical Physics and Bioengineering, UCL, London, UK
    Phys Med Biol 54:N347-54. 2009
    ..By accepting an increase in the overall image noise, the method also appears to bring up secondary phase contrast fringes, which are not visible in the unprocessed signal...
  6. ncbi Phase contrast imaging of breast tumours with synchrotron radiation
    A Olivo
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, UK
    Appl Radiat Isot 67:1033-41. 2009
    ..Images of the same samples were also acquired with the absorption-based approach to allow a direct comparison and estimation of the advantages specifically ascribable to the PC technique...
  7. ncbi Signal and noise transfer properties of CMOS based active pixel flat panel imager coupled to structured CsI:Tl
    C D Arvanitis
    Department of Medical Physics and Bioengineering, University College London, London WC1E 6BT, United Kingdom
    Med Phys 36:116-26. 2009
    ..57. Active pixel flat panel imagers are shown to be digital x-ray imagers with almost constant DQE throughout a significant part of their dynamic range and in particular at very low exposures...
  8. ncbi Effects of signal diffusion on x-ray phase contrast images
    K Ignatyev
    Department of Medical Physics and Bioengineering, UCL, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Rev Sci Instrum 82:073702. 2011
    ..The interplay with the sample positioning with respect to the detector pixel matrix, which also has an effect on the obtained image contrast, is also discussed...
  9. ncbi The effects of the imaging system on the validity limits of the ray-optical approach to phase contrast imaging
    A Peterzol
    Dipartimento di Fisica, Università di Trieste e INFN, Sezione di Trieste, Via Valerio 2, 34100 Trieste, Italy
    Med Phys 32:3617-27. 2005
    ..The conditions allowing the use of the simplified ray-optical approach to describe the phase contrast images have been here defined and their validation has been proved by means of computer simulations and phantom experiments...
  10. ncbi Preliminary study on extremely small angle x-ray scatter imaging with synchrotron radiation
    A Olivo
    Dipartimento di Fisica, , Italy
    Phys Med Biol 47:469-80. 2002
    ..Possible in vivo implementations of the technique at no dose expense are finally discussed...
  11. ncbi High resolution Ca/P maps of bone architecture in 3D synchrotron radiation microtomographic images
    M Tzaphlidou
    Laboratory of Medical Physics, Medical School, University of Ioannina, PO Box 1186, 45110 Ioannina, Greece
    Appl Radiat Isot 62:569-75. 2005
    ..001). Differences between estimates made at 20 and 28 keV are not significant (p>0.5). An important aspect is the ability to map the spatial distribution of the Ca/P ratio...
  12. ncbi Signal-to-noise ratio evaluation in dual-energy radiography with synchrotron radiation
    S Fabbri
    , Ferrara, Italy
    Phys Med Biol 47:4093-105. 2002
    ..81 mGy for the low-energy image and 0.01 mGy for the high-energy image. To obtain the same image quality for a standard breast of 5.5 cm, mean glandular doses of 3.50 mGy and 0.03 mGy at 17 keV and at 34 keV, respectively, are required...