A Olivo

Summary

Affiliation: University College London
Country: UK

Publications

  1. ncbi request reprint 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. doi request reprint Method for automatization of the alignment of a laboratory based x-ray phase contrast edge illumination system
    T P Millard
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Rev Sci Instrum 84:083702. 2013
  3. ncbi request reprint 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
  4. ncbi request reprint Low-dose phase contrast tomography with conventional x-ray sources
    C K Hagen
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Med Phys 41:070701. 2014
  5. ncbi request reprint Monte Carlo model of a polychromatic laboratory based edge illumination x-ray phase contrast system
    T P Millard
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Rev Sci Instrum 85:053702. 2014
  6. ncbi request reprint 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
  7. pmc Sensitivity of edge illumination X-ray phase-contrast imaging
    P C Diemoz
    Department of Medical Physics and Bioengineering, University College London, London WC1E 6BT, UK
    Philos Trans A Math Phys Eng Sci 372:20130128. 2014
  8. doi request reprint Low-dose phase contrast mammography with conventional x-ray sources
    A Olivo
    Department of Medical Physics and Bioengineering, UCL, Gower Street, London WC1E 6BT, United Kingdom
    Med Phys 40:090701. 2013
  9. doi request reprint 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
  10. doi request reprint 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

Collaborators

Detail Information

Publications18

  1. ncbi request reprint 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. doi request reprint Method for automatization of the alignment of a laboratory based x-ray phase contrast edge illumination system
    T P Millard
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Rev Sci Instrum 84:083702. 2013
    ..The algorithm has proved to be robust experimentally, and can be used for the automatization of future commercial systems through automatic alignment and alignment correction. ..
  3. ncbi request reprint 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...
  4. ncbi request reprint Low-dose phase contrast tomography with conventional x-ray sources
    C K Hagen
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Med Phys 41:070701. 2014
    ..In this paper, the first tomographic EI XPCi images acquired with a conventional x-ray source at dose levels below that used for preclinical small animal imaging are presented...
  5. ncbi request reprint Monte Carlo model of a polychromatic laboratory based edge illumination x-ray phase contrast system
    T P Millard
    Department of Medical Physics and Bioengineering, University College London, Malet Place, Gower Street, London WC1E 6BT, United Kingdom
    Rev Sci Instrum 85:053702. 2014
    ....
  6. ncbi request reprint 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...
  7. pmc Sensitivity of edge illumination X-ray phase-contrast imaging
    P C Diemoz
    Department of Medical Physics and Bioengineering, University College London, London WC1E 6BT, UK
    Philos Trans A Math Phys Eng Sci 372:20130128. 2014
    ..Finally, an example of the extremely high angular resolution achievable with the EI technique is presented. ..
  8. doi request reprint Low-dose phase contrast mammography with conventional x-ray sources
    A Olivo
    Department of Medical Physics and Bioengineering, UCL, Gower Street, London WC1E 6BT, United Kingdom
    Med Phys 40:090701. 2013
    ..XPCI shows potential in synchrotron studies but attempts at translating it for use with conventional sources are subject to limitations in terms of field of view, stability, exposure time, and possibly most importantly, delivered dose...
  9. doi request reprint 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...
  10. doi request reprint 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...
  11. ncbi request reprint 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...
  12. doi request reprint 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
    ....
  13. ncbi request reprint A new technique for the assessment of the 3D spatial distribution of the calcium/phosphorus ratio in bone apatite
    A Hadjipanteli
    Department of Medical Physics and Bioengineering, University College London, Gower Street, London, WC1E 6BT, UK
    Physiol Meas 34:1399-410. 2013
    ..The low Ca/P ratio volume proportion in IMO samples (12.8%-13.9%) was found to be higher than in healthy (5.8%-8.3%) samples. A region growing technique showed a higher homogeneity of Ca/P ratio in healthy than in IMO bone samples. ..
  14. doi request reprint 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...
  15. ncbi request reprint 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...
  16. ncbi request reprint Preliminary study on extremely small angle x-ray scatter imaging with synchrotron radiation
    A Olivo
    Dipartimento di Fisica, Università di Trieste e INFN, Italy
    Phys Med Biol 47:469-80. 2002
    ..Possible in vivo implementations of the technique at no dose expense are finally discussed...
  17. ncbi request reprint 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...
  18. ncbi request reprint Signal-to-noise ratio evaluation in dual-energy radiography with synchrotron radiation
    S Fabbri
    Dipartimento di Fisica dell Università e INFN, 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...