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With upconversion based mid-infrared reflection spectroscopy we have proved it possible to differentiate between several common types of black plastics. This allow for the possibility of efficient sorting of black plastics in clean fractions, paving the road for both economically viable and ecologically sustainable recycling.
Exploitation of the statistical properties of classical or non-classical light sources is the cause of fascinating new applications. For the two last decades, ghost imaging has emerged as a way to form images of an object with a Single Point Detector (SPD) that does not have spatial resolution [1-5]. By taking into account space-time duality in optics, the extension of the results of spatial ghost...
Single photon detectors allow us to work with the weakest signals such as auto-fluorescent biological sources. In combination with time gated operation mode, an array of detectors can be used as Fluorescence Lifetime Imaging system with extremely high sensitivity.
Autoradiography is a method that allows to take ex-vivo images of thin sections of tissue labelled with a radioactive tracer. In the present work, we aim to study the feasibility of autoradiography with CMOS (Complementary Metal Oxide Semiconductor) Mimosa-28 by using 2-Deoxy-2-18F-fluoro-D-glucose (18F-FDG). Autoradiography allows a functional imaging pixelated with a resolution equivalent to optical...
We present the optical transfer function (OTF) analysis of a spaceborne imaging sensor. This includes the effects of detector footprint, diffusion, smear, jitter, sampling, and time delay and integration. Each effect is analyzed under various design choices one of which corresponds to our designed complementary metal-oxide semiconductor imaging sensor. Effect of each subsystem is separately demonstrated...
Within the neu_ART project, funded by Regione Piemonte (Italy), a team of specialists in different scientific fields coming from Istituto Nazionale di Fisica Nucleare (INFN), Physics Department of University of Torino and Centro Conservazione e Restauro (CCR) “La Venaria Reale” has developed a new digital X-ray apparatus expressly designed for painted canvas and panels up to about 3 m × 4 m. Compared...
Compressive Sensing can be implemented to protect the privacy of information, this property could be also used to authenticate Compressive Sensing based imaging measurements, since attacker without knowledge about the measurement matrix/key cannot modify the content in a meaningful way but just results noise. When the received measurements were proven to be contently acceptable, the adversary has...
Light scattering on diffuse rough surfaces was long assumed to destroy geometry and photometry information about hidden (non line of sight) objects making ‘looking around the corner’ (LATC) and ‘non line of sight’ (NLOS) imaging impractical. Recent work pioneered by Kirmani et al. [1], Velten et al. [2] demonstrated that transient information (time of flight information) from these scattered third...
We have designed, fabricated, and characterized an uncooled, multi-band sub-wavelength metamaterial detector focal plane array (FPA) for real-time multi-spectral terahertz (THz) wave sensing and imaging. A rise in temperature due to the resonant absorption by split ring resonators (SRRs) leads to an increase in the interconnected SRR array's resistance, which can be readily read out electrically....
A real-time object detection and classification system using FPGA developed for high-speed asymmetric time-stretched optical microscopy (ATOM) framework is presented. Due to the massive amount of data generated by optical frontend, storing the raw data for offline post-processing is slow and impractical for the targeted single cell analysis applications. The proposed FPGA solution eliminates the need...
We describe packaging challenges for the development of practical THz imagers based on InP transistor circuits. Very high aspect ratio (>20:1) die singulation and additive manufacturing for waveguide housings are shown to help in addressing these challenges.
In previous projects funded by the DOE, Proportional Technologies, Inc. developed the basic design of a neutron imaging detector, based on the boron-coated straw technology, aimed to replace 3He tubes in large-scale neutron science instruments. Recent efforts have focused on automated production methods, including a critical 10B4C high volume sputter coating system, and automated in-line straw tube...
Portable nuclear imaging devices have been pursed for intraoperative localization and visualization of tumors for a complete removal of malignant tissues. In the proximity of the tumor site, beta imaging is advantageous over gamma imaging due to far less long-range contamination and no need of heavy metal collimation for a compact size. The traditional beta particle detection usually uses a thin scintillation...
A demonstrator of the portable position sensitive neutron detecting device for neutron imaging in a mixed radiation field is presented. A detector of the device is based on multilayer perpendicularly crossed strip sensors interlaced with neutron converter. A 6LiF converter producing energetic alpha particles and tritons is used. The converter permits precise determination of a position of the neutron...
Muon scattering tomography techniques can be used to image the contents of an enclosed volume by measuring the scattering angle of cosmic ray muons as they pass through a volume using particle tracking detectors. The magnitude of the observed muon scatter varies with the density of the objects within a volume, therefore the technique is well suited to distinguishing dense (high-Z) materials from lower...
Fast and accurate lost radioactive source positioning is of critical importance for the prevention of radiation damage in the accident. Traditional instruments with low detection efficiency cost lots pf time and energy, and may lead to harms to the operator's health. A portable detector to directly determine the incident angle of gamma rays is promising for the homeland security applications. In this...
Radiotherapy, whilst useful in the treatment of many cancers, suffers from the drawback of unavoidably delivering radiation doses to healthy tissue. Gold nanoparticles (GNPs) have been the subject of much interest as they are able to generate a local dose enhancing effect (DEE), allowing lower intensity beams to achieve a given effect, sparing healthy tissue. It is important that GNP distributions...
Dedicated brain PET has the potential to achieve better sensitivity, spatial resolution and image quality than conventional whole body PET cameras in brain tomography. Spherical PET (S-PET), that can achieve a higher geometrical sensitivity and a lower parallax error than conventional cylindrical ring PET scanners, is a good candidate for high performance dedicated brain imaging. Our simulation studies...
PTSIM is a particle therapy system simulation framework based on Geant4 Monte Carlo simulation toolkit. It was originally developed as a reliable dose calculation tool to verify dose distributions inside patient and dose calculation algorithms in treatment planning systems. Besides such a reliable dose calculation, an irradiation field monitoring is desirable for delivering dose with more ideal distribution...
The development and testing of a 2d neutron detector for the OffSpec reflectometer on the second target station of the ISIS spallation neutron source is reported. Based on a microstrip gas chamber (MSGC) the detector utilises a wire plane operating at zero gain to provide the second coordinate, which relaxes the tolerances on the wireplane necessary for stable operation. The
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