Time-resolved reflectance spectroscopy for nondestructive assessment of fruit and vegetable quality

Torricelli, Alessandro; Spinelli, Lorenzo; Vanoli, M.; Rizzolo, A.; Zerbini, P. Eccher

doi:10.1117/12.751793

Cited by 18 publications

(20 citation statements)

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“…Both chemical (related to absorption) and structural (related to scattering) information can be retrieved by photons traveling through the diffusive medium. Numerous applications have been pursued, both in the medical field-ranging from functional brain imaging 2,3 and neuromonitoring, [4][5][6] to cancer diagnostics 7,8 and therapy monitoring, 9,10 -and in industrial sectors such as characterization of food, 11,12 wood, 13,14 and pharmaceuticals. 15,16 A key requirement for such applications to grow and gain a more widespread clinical or industrial acceptance is to achieve a high grade of reliability, reproducibility, accuracy in quantification, and comparability of clinical results.…”

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Mechanically switchable solid inhomogeneous phantom for performance tests in diffuse imaging and spectroscopy

et al. 2015

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Abstract. A mechanically switchable solid inhomogeneous phantom simulating localized absorption changes was developed and characterized. The homogeneous host phantom was made of epoxy resin with black toner and titanium dioxide particles added as absorbing and scattering components, respectively. A cylindrical rod, movable along a hole in the block and made of the same material, has a black polyvinyl chloride cylinder embedded in its center. By varying the volume and position of the black inclusion, absorption perturbations can be generated over a large range of magnitudes. The phantom has been characterized by various timedomain diffuse optics instruments in terms of absorption and scattering spectra, transmittance images, and reflectance contrast. Addressing a major application of the phantom for performance characterization for functional near-infrared spectroscopy of the brain, the contrast was measured in reflectance mode while black cylinders of volumes from ≈20 mm 3 to ≈270 mm 3 were moved in lateral and depth directions, respectively. The new type of solid inhomogeneous phantom is expected to become a useful tool for routine quality check of clinical instruments or implementation of industrial standards provided an experimental characterization of the phantom is performed in advance.

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Mechanically switchable solid inhomogeneous phantom for performance tests in diffuse imaging and spectroscopy

et al. 2015

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“…'Golden Delicious' apples One hundred fifty-six 'Golden Delicious' apples were harvested at commercial maturity from an orchard in Laimburg (Bolzano province, Italy) and were transported to the laboratory in Milan, Italy. These apples were then sorted in ascending maturity according to descending values of absorption coefficient μ a of chlorophyll at 670 nm measured by a TRS setup (Torricelli et al, 2008). The ranked apples were randomly distributed into 9 groups.…”

Section: Methodsmentioning

confidence: 99%

Reprint of "Optical properties–microstructure–texture relationships of dried apple slices: Spatially resolved diffuse reflectance spectroscopy as a novel technique for analysis and process control"

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et al. 2014

Innovative Food Science & Emerging Technologies

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“…34 Thus, a number of in vivo applications and clinical studies were possible with TD systems in different areas, primarily optical mammography, 35 brain mapping, 36 and muscle monitoring. 34 Thus, a number of in vivo applications and clinical studies were possible with TD systems in different areas, primarily optical mammography, 35 brain mapping, 36 and muscle monitoring.…”

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confidence: 99%

New frontiers in time-domain diffuse optics, a review

et al. 2016

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The recent developments in time-domain diffuse optics that rely on physical concepts (e.g., time-gating and null distance) and advanced photonic components (e.g., vertical cavity source-emitting laser as light sources, single photon avalanche diode, and silicon photomultipliers as detectors, fast-gating circuits, and time-to-digital converters for acquisition) are focused. This study shows how these tools could lead on one hand to compact and wearable time-domain devices for point-of-care diagnostics down to the consumer level and on the other hand to powerful systems with exceptional depth penetration and sensitivity.

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Time-resolved reflectance spectroscopy for nondestructive assessment of fruit and vegetable quality

Cited by 18 publications

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Mechanically switchable solid inhomogeneous phantom for performance tests in diffuse imaging and spectroscopy

Mechanically switchable solid inhomogeneous phantom for performance tests in diffuse imaging and spectroscopy

Reprint of "Optical properties–microstructure–texture relationships of dried apple slices: Spatially resolved diffuse reflectance spectroscopy as a novel technique for analysis and process control"

New frontiers in time-domain diffuse optics, a review

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