Research Topics
| Giovanni ZaccantiSummaryAffiliation: University of Florence Country: Italy Publications
| Collaborators
|
Detail Information
Publications
Measurements of optical properties of high-density mediaGiovanni Zaccanti
Dipartimento di Fisica dell Università degli Studi di Firenze and Istituto Nazionale per la Fisica della Materia, Via G Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Appl Opt 42:4023-30. 2003..A comparison with an approximate theoretical model based on the Foldy-Twersky equation is also reported. The model provides a good description of the dependence of mu(s) on particle concentration...- Perturbation model for light propagation through diffusive layered mediaFabrizio Martelli
Dipartimento di Fisica dell Università degli Studi di Firenze and Istituto Nazionale per la Fisica della Materia, Via G Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Phys Med Biol 50:2159-66. 2005..The forward solver presented in this paper can be of significant use in investigating the feasibility of real experiments, e.g. for functional imaging studies... 
Carbon nanohorn-based nanofluids: characterization of the spectral scattering albedoLuca Mercatelli
National Research Council National Institute of Optics CNR INO, Largo E, Fermi, 6, Florence, 50125, Italy
Nanoscale Res Lett 7:96. 2012..05.U- carbon/carbon-based materials; 78.67.Bf optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures, nanocrystals, nanoparticles, and nanoclusters...- Heuristic Green's function of the time dependent radiative transfer equation for a semi-infinite mediumFabrizio Martelli
Dipartimento di Fisica dell Università degli Studi di Firenze, Via G Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Opt Express 15:18168-75. 2007..Moreover the proposed solution can be useful to several research fields where the study of a transport process is fundamental... - Phantom validation and in vivo application of an inversion procedure for retrieving the optical properties of diffusive layered media from time-resolved reflectance measurementsFabrizio Martelli
Dipartimento di Fisica dell Università degli Studi di Firenze and Istituto Nazionale per la Fisica della Materia, Via G Sansone 1, 50019 Sesto Fiorentino, Florence, Italy
Opt Lett 29:2037-9. 2004..The first layer thickness could be retrieved with an error less than 50%. An example of retrieval of the optical properties of muscle from in vivo measurements during an arterial occlusion is shown... - Solution of the time-dependent diffusion equation for a three-layer medium: application to study photon migration through a simplified adult head modelFabrizio Martelli
Dipartimento di Fisica dell Università degli Studi di Firenze, Via G Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Phys Med Biol 52:2827-43. 2007..25 mm(-1)... - Effect of the refractive index mismatch on light propagation through diffusive layered mediaFabrizio Martelli
, Via G. Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Phys Rev E Stat Nonlin Soft Matter Phys 70:011907. 2004..The solution has been validated by comparisons with the results of Monte Carlo simulations. An excellent description of light propagation is given even for a high refractive index mismatch... 
Retrieval procedure for time-resolved near-infrared tissue spectroscopy based on the optimal estimation methodFabrizio Martelli
Dipartimento di Fisica e Astronomia dell Università degli Studi di Firenze, Via G Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Phys Med Biol 57:2915-29. 2012..Similarly, a more correct estimate of the errors of the forward model parameters improves the retrieval of the target parameters...- Penetration depth of light re-emitted by a diffusive medium: theoretical and experimental investigationSamuele Del Bianco
Dipartimento di Fisica, , Istituto Nazionale per la Fisica della Materia, Via G Sansonee, 50019 Sesto Fiorentino, Firenze, Italy
Phys Med Biol 47:4131-44. 2002..In particular, the depth reached by received photons provides overall information on the volume of the tissue actually investigated, while the mean path is strictly related to the sensitivity to local variations of absorption... - Method to measure the optical properties of small volumes of diffusive mediaGiovanni Zaccanti
, Via G. Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Appl Opt 41:7317-24. 2002..The inversion procedure is based on the solution of the diffusion equation obtained with a perturbative approach. The method has been validated with Monte Carlo results. Examples of experimental results are reported... - The use of India ink in tissue-simulating phantomsPaola Di Ninni
Dipartimento di Fisica e Astronomia dell Università degli Studi di Firenze, Firenze, Italy
Opt Express 18:26854-65. 2010..A similar accuracy is not easily obtained with the complicated procedures necessary for measurements of absorption coefficient... - Intralipid: towards a diffusive reference standard for optical tissue phantomsPaola Di Ninni
Dipartimento di Fisica e Astronomia dell Università degli Studi di Firenze, Via G Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Phys Med Biol 56:N21-8. 2011..8 nm. These results suggest that Intralipid 20% can be the first step towards a diffusive reference standard for tissue-simulating phantoms... - Absorption and scattering properties of carbon nanohorn-based nanofluids for direct sunlight absorbersLuca Mercatelli
National Institute of Optics, National Council of Research, Firenze, 50125, Italy
Nanoscale Res Lett 6:282. 2011..pacs: 78.40.ri, 78.35.+c, 78.67.bf, 88.40.fh, 88.40.fr, 81.05.u... - Effect of dependent scattering on the optical properties of Intralipid tissue phantomsPaola Di Ninni
Dipartimento di Fisica e Astronomia dell Università degli Studi di Firenze Via G Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy
Biomed Opt Express 2:2265-78. 2011..Due to the intrinsic limitations of the different techniques proposed for measuring the optical properties it seems difficult to obtain a similar accuracy for solid phantoms... - In vivo time-resolved reflectance spectroscopy of the human foreheadDaniela Comelli
Centre of Ultrafast and Ultraintense Optical Science, Consiglio Nazionale delle Ricerche, Istituto Nazionale de Fisica della Materia, Politecnico di Milano, Milano, Italy
Appl Opt 46:1717-25. 2007..e., scalp and skull) than to deeper layer ones (white and gray matter). In particular, for the shorter interfiber distances, the recovered values can be assumed as a good estimate of the optical properties of the first layer... - Absorption and scattering perturbations in homogeneous and layered diffusive media probed by time-resolved reflectance at null source-detector separationLorenzo Spinelli
INFM-Dipartimento di Fisica and IFN-CNR, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milan, Italy
Phys Rev E Stat Nonlin Soft Matter Phys 74:021919. 2006..Exhaustive investigation in the parameters space is reported... - Analytical calculation of the mean time spent by photons inside an absorptive inclusion embedded in a highly scattering mediumVictor Chernomordik
National Institutes of Health, National Institute of Child Health and Development, Bldg 12A, Rm 2041, 9000 Rockville Pike, Bethesda, Maryland 20892 5626, USA
J Biomed Opt 7:486-92. 2002.... - Analytical approximate solutions of the time-domain diffusion equation in layered slabsFabrizio Martelli
, Italy
J Opt Soc Am A Opt Image Sci Vis 19:71-80. 2002.... - Time-resolved diffuse reflectance using small source-detector separation and fast single-photon gatingAntonio Pifferi
IIT, ULTRAS INFM CNR and IFN CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I 20133 Milan, Italy
Phys Rev Lett 100:138101. 2008..Finally, the proposed approach proved valuable to detect in vivo a task-related brain activation... - Assessment of an in situ temporal calibration method for time-resolved optical tomographyJeremy C Hebden
University College London, Department of Medical Physics and Bioengineering, 11 20 Capper Street, London WC1E 6JA, UK
J Biomed Opt 8:87-92. 2003..The effectiveness of the method is briefly demonstrated by imaging a solid object with tissue-equivalent optical properties...