A5056921795- Optical Imaging and Spectroscopy Techniques
- Spectroscopy and Chemometric Analyses
- Postharvest Quality and Shelf Life Management
- Plant Physiology and Cultivation Studies
- Non-Invasive Vital Sign Monitoring
- Phytochemicals and Antioxidant Activities
- Photoacoustic and Ultrasonic Imaging
- Spectroscopy Techniques in Biomedical and Chemical Research
- Botanical Research and Applications
- Heart Rate Variability and Autonomic Control
- Horticultural and Viticultural Research
- Hemodynamic Monitoring and Therapy
- Random lasers and scattering media
- Advanced Optical Sensing Technologies
- Water Quality Monitoring and Analysis
- Radiation Dose and Imaging
Politecnico di Milano
2022-2024
Significance: Multi-laboratory initiatives are essential in performance assessment and standardization—crucial for bringing biophotonics to mature clinical use—to establish protocols develop reference tissue phantoms that all will allow universal instrument comparison. Aim: The largest multi-laboratory comparison of near-infrared diffuse optics is presented, involving 28 instruments 12 institutions on a total eight experiments based three consolidated (BIP, MEDPHOT, NEUROPT) as implemented...
Significance: Tissue-like solid phantoms with identical optical properties, known within tolerant uncertainty, are of crucial importance in diffuse optics for instrumentation assessment, interlaboratory comparison studies, industrial standards, and multicentric clinical trials. Aim: The reproducibility fabrication homogeneous is focused based on spectra measurements by instrument comparisons grounded the time-resolved optics. Approach: Epoxy-resin silicone considered as matrices both employ...
Continuous wave near infrared spectroscopy (CW-NIRS) is widely exploited in clinics to estimate skeletal muscles and brain cortex oxygenation. Spatially resolved (SRS) generally implemented commercial devices. However, SRS suffers from two main limitations: the a priori assumption on spectral dependence of reduced scattering coefficient [μs'(λ)] modeling tissue as homogeneous.We studied accuracy robustness NIRS. We investigated errors retrieving hemodynamic parameters, particular oxygen...
The aim of this work was to explore the feasibility time-resolved reflectance spectroscopy (TRS) in determining ripening degree and quality orange-fleshed melons. Sixty ‘Honey Moon’ melons were measured by TRS 540-1064 nm range classified as less (LeM), medium (MeM), more (MoM) mature according increasing values μa540. MoM fruit showed yellower peel color, slightly orange pulp, higher juiciness carotenoid contents than LeM ones. also internal ethylene concentration lower firmness ones, even...
Time-Domain Diffuse Optics (TDDO) technologies are rapidly evolving towards compact and cheap devices, thus progressively reducing the gap with continuous-wave equivalent while providing additional advantages of higher information content better depth penetration selectivity.One key limitations for TDDO is active area microelectronic time-resolved single-photon detectors as it not possible to efficiently focus Lambertian light exiting from highly scattering samples into small...
A high power setup for multichannel time-domain (TD) functional near infrared spectroscopy (fNIRS) measurements with efficiency detection system was developed. It fully characterized based on international performance assessment protocols diffuse optics instruments, showing an improvement of the signal-to-noise ratio (SNR) respect to previous analogue devices, and allowing acquisition signals sampling rate up 20 Hz source-detector distance 5 cm. resting-state measurement motor cortex a...
Time-resolved reflectance spectroscopy (TRS), a nondestructive technique, can help the industry to provide high-quality fruit encourage pear consumption. The absorption coefficient measured by TRS at 670 nm (μa670) represents maturity index for fruit, with less mature pears high μa670 and more low μa670. aim of this work was study quality characteristics, sensory profiles ethylene production 'Abate Fetel' sorted harvest in different classes stored atmospheres. At harvest, 540 were μa670,...
Mango fruit is a rich source of bioactive compounds such as carotenoids, phenolics, and ascorbic acid. This research aimed at predicting the content these in ‘Tommy Atkins’ mangoes using optical properties, i.e., absorption coefficients related to chlorophylls (µa630, µa650, µa670, µa690) carotenoids (µa540), scattering parameters (Mie’s A b), measured during shelf-life period 20 °C by time-resolved reflectance spectroscopy. The µa540 Mie’s b increased shelf-life, while µa670 decreased....