Searched for: subject%3A%22time%255C-of%255C-flight%22
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Srikanth, Vikram (author)
Small satellite systems such as CubeSats and PocketQubes have strict requirements in terms of size, weight, and power available onboard. In light of these constraints, small satellite systems typically omit the inclusion of a ranging system due to its power and specialized hardware requirements. However, new research in satellite ranging...
master thesis 2023
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Li, Nan (author)
Cerebral oxygen saturation is an important indicator that reflects the oxygen metabolism of the brain tissues in such patients. The utilization of near-infrared spectroscopy (NIRS) enables the identification of the oxygen saturation levels in nearby tissues by analyzing the distinct oxygenation states of hemoglobin-oxyhemoglobin (HbO2) and the...
master thesis 2023
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van der Kolk, Niels (author)
Hidden spy cameras are a growing worldwide threat to people’s intimacy and privacy. With the growing interest in full-screen devices and the underlying development of under-screen cameras, a new type of potential security risk is introduced. Recent smartphones such as the ZTE AXON 40 already demonstrate that it’s infeasible to detect the camera...
master thesis 2023
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Koppejan, Hester (author), Beyrend, Guillaume (author), Hameetman, Marjolijn (author), Abdelaal, T.R.M. (author), Toes, René E.M. (author), van Gaalen, Floris A. (author)
Objective: Mass cytometry (MC) immunoprofiling allows high-parameter phenotyping of immune cells. We set to investigate the potential of MC immuno-monitoring of axial spondyloarthritis (axSpA) patients enrolled in the Tight Control SpondyloArthritis (TiCoSpA) trial. Methods: Fresh, longitudinal PBMCs samples (baseline, 24, and 48 weeks) from...
journal article 2023
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Iashina, E.G. (author), Bouwman, W.G. (author), Duif, C.P. (author), Dalgliesh, Robert M. (author), Varfolomeeva, Elena Y. (author), Pantina, Rimma A. (author), Kovalev, Roman A. (author), Fedorova, Natalia D. (author), Grigoriev, S. V. (author)
The organization of chromatin in the nuclei of rat lymphocyte was studied by time-of-flight spin-echo small-angle neutron scattering (ToF-SESANS). The procedures of the measurements in ToF and monochromatic SESANS modes were compared. It is shown that the sensitivity of the ToF method is significantly higher than that of the monochromatic mode....
journal article 2023
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Chandrasekaran, N.B. (author), Michelis, Theodorus (author), Mercier, Bertrand (author), Colonna, Piero (author)
This paper describes the design, functioning, and preliminary experiments in the Asymmetric Shock Tube for Experiments on Rarefaction Waves (ASTER), a Ludwieg-type shock tube designed and realised to measure waves propagating in dense vapour flows of organic fluids. The setup is designed to operate at pressures and temperatures of up to 15...
book chapter 2023
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Son, Dongjin (author)
In this work, a SPAD-based LiDAR system is studied. In particular, the system employs a direct time-of-flight (dToF) method to reconstruct a target-reflected pulses using histogram, from which the distance to the target is estimated. More particularly, a time correlated single photon counting (TCSPC) method has been used to record the flight...
master thesis 2022
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Dukker, Sven (author), Minten, Melle (author)
Localization is an important element for a moving swarm of robots. A swarm contains many individuals, and it is essential that the swarm members do not collide. Expensive and complex implementations to localize others is undesirable. Hence, a localization system designed using the available resources is desired. The available techniques that...
bachelor thesis 2022
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Schaart, D.R. (author), Schramm, Georg (author), Nuyts, Johan (author), Surti, Suleman (author)
The first time-of-flight positron emission tomography (TOF-PET) scanners were developed as early as in the 1980s. However, the poor light output and low detection efficiency of TOF-capable detectors available at the time limited any gain in image quality achieved with these TOF-PET scanners over the traditional non-TOF PET scanners. The...
review 2021
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Schaart, D.R. (author)
The imaging performance of clinical positron emission tomography (PET) systems has evolved impressively during the last ∼15 years. A main driver of these improvements has been the introduction of time-of-flight (TOF) detectors with high spatial resolution and detection efficiency, initially based on photomultiplier tubes, later silicon...
review 2021
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Anandan, Shamundeeswari (author), Thomsen, Liv Cecilie V. (author), Gullaksen, Stein Erik (author), Abdelaal, T.R.M. (author), Kleinmanns, Katrin (author), Skavland, Jørn (author), Bredholt, Geir (author), Gjertsen, Bjørn Tore (author), McCormack, Emmet (author), Bjørge, Line (author)
Improved molecular dissection of the tumor microenvironment (TME) holds promise for treating high-grade serous ovarian cancer (HGSOC), a gynecological malignancy with high mortality. Reliable disease-related biomarkers are scarce, but single-cell mapping of the TME could identify patient-specific prognostic differences. To avoid technical...
journal article 2021
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Padmanabhan, P. (author), Zhang, C. (author), Charbon-Iwasaki-Charbon, E. (author)
Direct time-of-flight (DTOF) is a prominent depth sensing method in light detection and ranging (LiDAR) applications. Single-photon avalanche diode (SPAD) arrays integrated in DTOF sensors have demonstrated excellent ranging and 3D imaging capabilities, making them promising candidates for LiDARs. However, high background noise due to solar...
journal article 2019
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Hill, Kevin (author)
Most current proximity sensing methods fail the stringent requirements of modern smartphones. A position-sensing device (PSD) requires a laser placed some distance away from the sensor, intensity-based solutions are sensitive to changes in reflectivity, and ultrasound-based sensors cannot measure small distances because of resonance. With modern...
master thesis 2019
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Zhang, C. (author)
In conventional applications, such as bio-imaging and microscopy, SPAD is typically used as a single-photon counter. However, this advantage has been challenged by other photon-counting technologies, especially from CMOS-based QIS. Comparatively, apart from single-photon counting capability, QIS is superior to SPAD in terms of intrinsic multi...
doctoral thesis 2019
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Zhang, C. (author), Lindner, S.A. (author), Antolović, I.M. (author), Wolf, Martin (author), Charbon-Iwasaki-Charbon, E. (author)
Per-pixel time-to-digital converter (TDC) architectures have been exploited by single-photon avalanche diode (SPAD) sensors to achieve high photon throughput, but at the expense of fill factor, pixel pitch and readout efficiency. In contrast, TDC sharing architecture usually features high fill factor at small pixel pitch and energy efficient...
journal article 2018
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Geerits, Niels (author)
A time of flight MIEZE spectrometer, which employs radio frequency spin flippers with square pole shoes and a magnetic yoke is presented. These flippers can achieve higher fields than conventional resonant RF flippers, which employ an air core. High fields are crucial for the construction of a high resolution and compact MIEZE spectrometer....
master thesis 2018
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Venialgo Araujo, E. (author), Lusardi, Nicola (author), Garzetti, Fabio (author), Geraci, Angelo (author), Brunner, S. (author), Schaart, D.R. (author), Charbon-Iwasaki-Charbon, E. (author)
Typically, a time-of-flight (TOF) PET block detector is built using application-specific integrated circuits (ASICs), since they integrate a high number of channels at a reasonable power consumption and into a small area. However, ASICs’ flexibility is limited and prototyping times are long because a semiconductor fabrication process is required...
journal article 2018
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Borghi, G. (author), Tabacchini, V. (author), Bakker, P.J. (author), Schaart, D.R. (author)
Recently, a monolithic scintillator detector for time-of-flight (TOF)/depth-of-interaction (DOI) positron emission tomography (PET) was developed. It has a detector spatial resolution of ∼1.7 mm full-width-at-half-maximum (FWHM), a coincidence resolving time (CRT) of ∼215 ps FWHM, and ∼4.7 mm FWHM DOI resolution. Here, we demonstrate, for the...
journal article 2018
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Cambraia Lopes, Patricia (author), Crespo, Paulo (author), Simões, Hugo (author), Ferreira Marques, Rui (author), Parodi, Katia (author), Schaart, D.R. (author)
Prompt-gamma (PG) imaging has the potential for monitoring proton therapy in real time. Different approaches are investigated. We focus on developing multi-slat collimators to image PG quanta, aiming at optimizing collimator performance to detect deviations in treatment delivery. We investigated six different multi-slat configurations, which...
journal article 2018
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Brunner, S. (author), Schaart, D.R. (author)
Due to detector developments in the last decade, the time-of-flight (TOF) method is now commonly used to improve the quality of positron emission tomography (PET) images. Clinical TOF-PET systems based on L(Y)SO:Ce crystals and silicon photomultipliers (SiPMs) with coincidence resolving times (CRT) between 325 ps and 400 ps FWHM have recently...
journal article 2017
Searched for: subject%3A%22time%255C-of%255C-flight%22
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