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Soldevila F, Lenz AJM, Ghezzi A, Farina A, D'Andrea C, Tajahuerce E. Giga-voxel multidimensional fluorescence imaging combining single-pixel detection and data fusion. Opt Lett 2021; 46:4312-4315. [PMID: 34470002 DOI: 10.1364/ol.434127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 07/29/2021] [Indexed: 06/13/2023]
Abstract
Time-resolved fluorescence imaging is a key tool in biomedical applications, as it allows to non-invasively obtain functional and structural information. However, the big amount of collected data introduces challenges in both acquisition speed and processing needs. Here, we introduce a novel technique that allows to acquire a giga-voxel 4D hypercube in a fast manner while measuring only 0.03% of the dataset. The system combines two single-pixel cameras and a conventional 2D array detector working in parallel. Data fusion techniques are introduced to combine the individual 2D and 3D projections acquired by each sensor in the final high-resolution 4D hypercube, which can be used to identify different fluorophore species by their spectral and temporal signatures.
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2
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Farina A, Candeo A, Dalla Mora A, Bassi A, Lussana R, Villa F, Valentini G, Arridge S, D'Andrea C. Novel time-resolved camera based on compressed sensing. Opt Express 2019; 27:31889-31899. [PMID: 31684412 DOI: 10.1364/oe.27.031889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
Time-resolved cameras with high temporal resolution (down to ps) enable a huge set of novel applications ranging from biomedicine and environmental science to material and device characterization. In this work, we propose, and experimentally validate, a novel detection scheme for time-resolved imaging based on a compressed sampling approach. The proposed scheme unifies into a single element all the required operations, i.e. space modulation, space integration and time-resolved detection, paving the way to dramatic cost reduction, performance improvement and ease of use.
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3
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Messina E, Donato MG, Zimbone M, Saija R, Iatì MA, Calcagno L, Fragalà ME, Compagnini G, D'Andrea C, Foti A, Gucciardi PG, Maragò OM. Optical trapping of silver nanoplatelets. Opt Express 2015; 23:8720-8730. [PMID: 25968710 DOI: 10.1364/oe.23.008720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Optical trapping of silver nanoplatelets obtained with a simple room temperature chemical synthesis technique is reported. Trap spring constants are measured for platelets with different diameters to investigate the size-scaling behaviour. Experimental data are compared with models of optical forces based on the dipole approximation and on electromagnetic scattering within a T-matrix framework. Finally, we discuss applications of these nanoplatelets for surface-enhanced Raman spectroscopy.
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4
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Oppido G, Liberi R, Careddu L, D'Andrea C, Angeli E, Gesuete V, Mariucci E, Gargiulo GD. 112-I * DACRON CONDUIT IS NOT SUITABLE FOR EXTRACARDIAC FONTAN OPERATION. Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu276.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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5
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Comelli D, Toja F, D'Andrea C, Toniolo L, Valentini G, Lazzari M, Nevin A. Advanced non-invasive fluorescence spectroscopy and imaging for mapping photo-oxidative degradation in acrylonitrile–butadiene–styrene: A study of model samples and of an object from the 1960s. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2013.12.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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De Rosa R, Piccolo R, Cassese S, Petretta A, D'Andrea C, D'Anna C, Piscione F, Chiariello M. Coronary flow reserve evaluation: basics, techniques and clinical applications. Minerva Cardioangiol 2011; 59:569-580. [PMID: 19946255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Coronary flow reserve is a useful physiologic parameter providing information on coronary stenoses severity. To date, the gold standard to evaluate coronary flow reserve consists of fractional flow reserve (FFR) measurement, assessed with a pressure-wire. The FFR has a high lesion specificity, due to insensitivity to patient hemodynamic status and to coronary microvascular resistance; it shows low inter- and intraindividual variability and a well-defined, bound cut-off range values (0.75-0.80). Several reports confirmed that FFR has high reproducibility and feasibility in patients with either single- or multi-vessel coronary artery disease, or with both stable and instable coronary artery disease and that is significantly associated with patient outcome. More recently, the FFR has been used as a sensitive marker of successful percutaneous coronary intervention, since postprocedural FFR value strongly predicts patients event-free survival rate after angioplasty. Moreover, it has been demonstrated that abnormal FFR ratios can be also associated with diffused atherosclerotic coronary artery disease in the absence of unique angiographically detectable stenoses requiring revascularization. There are strong evidences supporting that the FFR provides crucial functional information that could be related with morphological endovascular ultrasound findings, with the possibility to achieve same information in a cheaper, easier and more available manner. This review will focus on the current available literature regarding coronary flow reserve quantification and its clinical validation, suggesting and highlighting its current and future clinical applications.
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Affiliation(s)
- R De Rosa
- Clinical Medicine Department, Federico II University Hospital, Naples, Italy
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7
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Brambilla L, Riedo C, Baraldi C, Nevin A, Gamberini MC, D'Andrea C, Chiantore O, Goidanich S, Toniolo L. Characterization of fresh and aged natural ingredients used in historical ointments by molecular spectroscopic techniques: IR, Raman and fluorescence. Anal Bioanal Chem 2011; 401:1827-37. [PMID: 21725834 DOI: 10.1007/s00216-011-5168-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 05/31/2011] [Accepted: 06/05/2011] [Indexed: 11/26/2022]
Abstract
Natural organic materials used to prepare pharmaceutical mixtures including ointments and balsams have been characterized by a combined non-destructive spectroscopic analytical approach. Three classes of materials which include vegetable oils (olive, almond and palm tree), gums (Arabic and Tragacanth) and beeswax are considered in this study according to their widespread use reported in ancient recipes. Micro-FTIR, micro-Raman and fluorescence spectroscopies have been applied to fresh and mildly thermally aged samples. Vibrational characterization of these organic compounds is reported together with tabulated frequencies, highlighting all spectral features and changes in spectra which occur following artificial aging. Synchronous fluorescence spectroscopy has been shown to be particularly useful for the assessment of changes in oils after aging; spectral difference between Tragacanth and Arabic gum could be due to variations in origin and processing of raw materials. Analysis of these materials using non-destructive spectroscopic techniques provided important analytical information which could be used to guide further study.
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Affiliation(s)
- L Brambilla
- Department CMIC, Politecnico di Milano, Milano, Italy.
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Piscione F, Piccolo R, Cassese S, Galasso G, D'Andrea C, De Rosa R, Chiariello M. Is direct stenting superior to stenting with predilation in patients treated with percutaneous coronary intervention? results from a meta-analysis of 24 randomised controlled trials. Heart 2010; 96:588-94. [DOI: 10.1136/hrt.2009.183277] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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9
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Piscione F, Cassese S, Galasso G, Rapacciuolo A, De Rosa R, Piccolo R, D'Andrea C, Chiariello M. Coronary stenting early before non-cardiac surgery: is the endothelial progenitor cell capturing coronary stent a solution? Minerva Cardioangiol 2010; 58:147-152. [PMID: 20145601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The authors report, for the first time, immediate and mid-term outcome of early antiplatelet therapy discontinuation followed by uneventful non-cardiac surgery and endovascular aortic repair, few days after successful deployment of an endothelial progenitor cell capturing coronary stent, in three consecutive patients.
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Affiliation(s)
- F Piscione
- Department of Clinical Medicine, Federico II University, Naples, Italy
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D'Andrea C, Neri F, Ossi PM, Santo N, Trusso S. The controlled pulsed laser deposition of Ag nanoparticle arrays for surface enhanced Raman scattering. Nanotechnology 2009; 20:245606. [PMID: 19471080 DOI: 10.1088/0957-4484/20/24/245606] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An effective method for the production of surface enhanced Raman scattering (SERS) active substrates is presented. Nanostructured silver thin films are pulsed laser deposited in an argon atmosphere. The films consist of arrays of nanoparticles whose size is controlled by the Ar pressure. The surface morphology of the films can be tuned by the laser pulse number. Nanoparticle size is calculated by a phenomenological model taking into account the dynamics of the laser generated silver plasma. The SERS activity of the films is investigated by Raman scattering of adsorbed rhodamine 6G at different concentrations.
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Affiliation(s)
- C D'Andrea
- Dipartimento di Fisica della Materia e Ingegneria Elettronica, Università degli Studi di Messina, Salita Sperone 31, 98166, Messina, Italy
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D'Andrea C, Farina A, Comelli D, Pifferi A, Taroni P, Valentini G, Cubeddu R, Zoia L, Orlandi M, Kienle A. Time-resolved optical spectroscopy of wood. Appl Spectrosc 2008; 62:569-574. [PMID: 18498699 DOI: 10.1366/000370208784344424] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have proposed and experimentally demonstrated that picosecond time-resolved optical spectroscopy in the visible/near-infrared (NIR) region (700-1040 nm) is a useful technique for noninvasive characterization of wood. This technique has been demonstrated on both softwood and hardwood samples treated in different ways simulating the aging process suffered by waterlogged woods. In all the cases, alterations of absorption and scattering spectra were observed, revealing changes of chemical and structural composition.
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Affiliation(s)
- C D'Andrea
- CNR-INFM and CNR-IFN, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
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D'Andrea C, Spinelli L, Bassi A, Giusto A, Contini D, Swartling J, Torricelli A, Cubeddu R. Time-resolved spectrally constrained method for the quantification of chromophore concentrations and scattering parameters in diffusing media. Opt Express 2006; 14:1888-98. [PMID: 19503518 DOI: 10.1364/oe.14.001888] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We have devised and experimentally validated, on tissue-simulating phantoms and in vivo, a time-resolved spectral fitting analysis for direct assessment of chromophore concentrations and scattering parameters. Experimental data have been acquired with a time-resolved broadband system based on supercontinuum light generated in a photonic crystal fiber and a 32 channel Time Correlated Single Photon Counting system. The novel method is more robust than conventional techniques, especially at low signal-to-noise ratio.
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Comelli D, D'Andrea C, Valentini G, Cubeddu R, Casiraghi R, Cantarelli D. Analyzing integrated circuits at work with a picosecond time-gated imager. Opt Express 2005; 13:10075-10084. [PMID: 19503220 DOI: 10.1364/opex.13.010075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A system based on a picosecond time-gated image intensifier is proposed for non-contact testing of CMOS circuits. The apparatus allows one to record the temporal evolution of the luminescence emitted during transistor switching as a function of the position inside the chip. The system is characterized by an intrinsic parallelism in the spatial dimensions. This feature is noticeable for studying wide sections of complex circuits, like microprocessors and random access memories, where multiple electrical events occur simultaneously. Experiments on a CMOS inverter chain and on a static memory have been carried out, in order to demonstrate the applicability of a picosecond time-gated imager to circuit analysis.
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Cubeddu R, Canti G, D'Andrea C, Pifferi A, Taroni P, Torricelli A, Valentini G. Effects of photodynamic therapy on the absorption properties of disulphonated aluminum phthalocyanine in tumor-bearing mice. J Photochem Photobiol B 2001; 60:73-8. [PMID: 11470561 DOI: 10.1016/s1011-1344(01)00136-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Time-resolved reflectance spectroscopy was performed on tumor-bearing mice, administered with disulphonated aluminum phthalocyanine (AlS(2)Pc, 5 mg/kg body weight), before, during and after photodynamic therapy. This allowed us to evaluate the absorption spectrum of AlS(2)Pc in vivo from 610 to 700 nm, and to investigate how the therapeutic irradiation affects it. Two tumor locations (intraderma on the back and intramuscular in the leg), and two uptake times (3 and 12 h) were considered. As already observed previously, the absorption spectrum of AlS(2)Pc in vivo is centered at 680-685 nm. The irradiation causes a blue-shift of the measured line shape, more or less marked depending on the experimental conditions. A reduction in absorption is also often observed upon illumination with therapeutic light doses.
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Affiliation(s)
- R Cubeddu
- INFM-Dipartimento di Fisica and CEQSE-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy.
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Cubeddu R, D'Andrea C, Pifferi A, Taroni P, Torricelli A, Valentini G, Dover C, Johnson D, Ruiz-Altisent M, Valero C. Nondestructive quantification of chemical and physical properties of fruits by time-resolved reflectance spectroscopy in the wavelength range 650-1000 nm. Appl Opt 2001; 40:538-43. [PMID: 18357029 DOI: 10.1364/ao.40.000538] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Time-resolved reflectance spectroscopy can be used to assess nondestructively the bulk (rather than the superficial) optical properties of highly diffusive media. A fully automated system for time-resolved reflectance spectroscopy was used to evaluate the absorption and the transport scattering spectra of fruits in the red and the near-infrared regions. In particular, data were collected in the range 650-1000 nm from three varieties of apples and from peaches, kiwifruits, and tomatoes. The absorption spectra were usually dominated by the water peak near 970 nm, whereas chlorophyll was detected at 675 nm. For all species the scattering decreased progressively with increasing wavelength. A best fit to water and chlorophyll absorption line shapes and to Mie theory permitted the estimation of water and chlorophyll content and the average size of scattering centers in the bulk of intact fruits.
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Affiliation(s)
- R Cubeddu
- Istituto Nazionale per la Fisica della Materia, Dipartimento di Fisica and Centro di Elettronica Quantistica e Strumentazione Elettronica, Consiglio Nazionale delle Ricerche, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.
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Valentini G, D'Andrea C, Comelli D, Pifferi A, Taroni P, Torricelli A, Cubeddu R, Battaglia C, Consolandi C, Salani G, Rossi-Bernardi L, De Bellis G. Time-resolved DNA-microarray reading by an intensified CCD for ultimate sensitivity. Opt Lett 2000; 25:1648-50. [PMID: 18066303 DOI: 10.1364/ol.25.001648] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We describe a novel technique for DNA-microarray reading based on time-resolved fluorescence measurements. We used an intensified CCD camera with picosecond resolution to acquire a set of time-delayed fluorescence images from a mutation DNA microarray marked with cyanine 3. We measured the fluorescence lifetimes of the marker and the background separately, and we used this information to calculate the amplitude map of the marker, starting from the time-delayed images. This procedure allowed us to identify hybridized spots that are not visible in fluorescence images acquired with continuous-wave detection.
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Cubeddu R, Pifferi A, Taroni P, Torricelli A, Valentini G, Comelli D, D'Andrea C, Angelini V, Canti G. Fluorescence imaging during photodynamic therapy of experimental tumors in mice sensitized with disulfonated aluminum phthalocyanine. Photochem Photobiol 2000; 72:690-5. [PMID: 11107856 DOI: 10.1562/0031-8655(2000)072<0690:fidpto>2.0.co;2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A fluorescence imaging system was used to monitor the emission of disulfonated aluminum phthalocyanine (AlS2Pc) during the photodynamic therapy (PDT) of murine tumors. Cells of the MS-2 fibrosarcoma were injected in mice in two compartments in order to cause the development of tumors in different host tissues. Two drug doses and two uptake times were considered. Moreover, the fluorescence of the AlS2Pc was excited using two wavelengths on the opposite sides of the absorption peak to detect a possible change in the absorption spectrum of the sensitizer induced by the PDT. In the tumors, the treatment induces a variation of the fluorescence intensity: in some mice a mild photobleaching takes place, in others a fluorescence enhancement occurs. Which effect predominates depends on the experimental conditions, even though a large spread of data was found amongst mice of the same group. In all mice, independently of the drug dose, uptake time or tumor compartment, a marked increase in the fluorescence signal takes place at the borders of the irradiated area. To quantify this effect we evaluated the ratio between the fluorescence intensities in the peritumoral area and in the tumor itself. This ratio increases monotonically during the PDT, showing a different behavior with the two excitation wavelengths. This indicates that the AlS2Pc absorption spectrum shifts toward shorter wavelengths as a result of the irradiation.
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Affiliation(s)
- R Cubeddu
- INFM-Dipartimento di Fisica and CEQSE-CNR, Politecnico di Milano, Italy.
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18
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Cubeddu R, D'Andrea C, Pifferi A, Taroni P, Torricelli A, Valentini G. Effects of the menstrual cycle on the red and near-infrared optical properties of the human breast. Photochem Photobiol 2000; 72:383-391. [PMID: 10989610 DOI: 10.1562/0031-8655(2000)072>0383:eotmco<2.0.co;2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Time-resolved reflectance and transmittance spectroscopy was applied to measure in vivo the absorption and transport scattering spectra of the female breast from 610 to 1010 nm. Three measurement configurations were used to probe different breast regions, and data were collected two or three times in each of the five phases of the menstrual cycle. The absorption spectra were best-fitted with a linear combination of the spectra of the main tissue constituents (water, lipids, oxy- and deoxyhemoglobin). This allowed us to evaluate percentage contents of water and lipids, total hemoglobin content and hemoglobin oxygen saturation. The scattering spectra were interpreted with a function derived from Mie theory, providing information on the density and average size of the tissue scatterers. Significant changes in the estimated variables were observed with measurement geometry, reflecting the heterogeneous nature of the breast, and with time, in agreement with expected physiological changes over the menstrual cycle.
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Affiliation(s)
- R Cubeddu
- INFM-Dipartimento di Fisica, Politecnico di Milano, Italy.
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D'Andrea C, Vaccher E, Tirelli U. Discrimination against people with HIV infection and AIDS. BMJ 1994; 309:272-3. [PMID: 8069161 PMCID: PMC2540744 DOI: 10.1136/bmj.309.6949.272b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Vaccarezza JR, Ruiz DC, D'Andrea C, Bochi AA. [Biological and clinical action of UML 491 administered to tuberculous and asthmatic patients]. Rev Asoc Med Argent 1965; 79:289-292. [PMID: 5844730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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