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Pérez, Jesús Vilaboa (author), Loicq, J.J.D. (author)The E-TEST project builds a prototype for the Einstein Telescope (ET). ET is a proposed gravitational-wave observatory. E-TEST includes a silicon mirror of 30 cm up to 40 cm diameter, suspended and cooled down at cryogenic temperatures from 20 K to 30 K. During the cooling down, the mirror will be affected by surface topology changes, wavefront...conference paper 2022
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Garreau, G. (author), Bigioli, A. (author), Raskina, G. (author), Dandumont, C. (author), Berger, J-P. (author), Defrère, Denis (author), Laugier, Romain (author), Ireland, M. (author), Loicq, J.J.D. (author)Hi-5 is an ERC-funded project hosted at KU Leuven and a proposed visitor instrument for the VLTI. Its primary goal is to image the snow line region around young planetary systems using nulling interferometry in the L’ band, between 3.5 and 4.1 μm, where the contrast between exoplanets and their host stars is very advantageous. The breakthrough...conference paper 2022
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Noom, J. (author), Soloviev, O.A. (author), Smith, C.S. (author), Nguyen, Hieu Thao (author), Verhaegen, M.H.G. (author)We demonstrate a novel closed-loop input design technique on the detection of particles in an imaging system such as a fluorescence microscope. The probability of misdiagnosis is minimized while constraining the input energy such that for instance phototoxicity is reduced. The key novelty of the closed-loop design is that each next input is...conference paper 2022
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Roy, Kaustav (author), Shastri, V.U. (author), Kumar, Akshay (author), Rout, Jagi (author), Isha, Isha (author), Kalyan, Kritank (author), Prakash, Jaya (author), Pratap, Rudra (author)We report on the development of a novel piezo-MEMS-based optofluidic platform to detect the concentration of various species dissolved in a fluid. This platform employs piezoelectric micromachined ultrasound transducers (PMUTs) to work as a photoacoustic receiver, receiving ultrasound from fluid targets present in microfluidic channels while...conference paper 2022
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Pieters, Cedric (author), Westerveld, W.J. (author), Mahmud-Ul-Hasan, Hasan (author), Severi, Simone (author), Kjellman, Jon (author), Jansen, Roelof (author), Rochus, Veronique (author), Rottenberg, Xavier (author)Photoacoustic tomography defines new challenges for ultrasound detection compared to ultrasonography. To address these challenges, a sensitive, small, scalable, and broadband optomechanical ultrasound sensor (OMUS) has been developed. The OMUS is an on-chip optical ultrasound sensor, using optical interferometric ultrasound detection. It...conference paper 2022
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Thabit, Abdullah (author), Niessen, W.J. (author), Wolvius, Eppo B. (author), van Walsum, T. (author)Optical-based navigation systems are widely used in surgical interventions. However, despite their great utility and accuracy, they are expensive and require time and effort to setup for surgeries. Moreover, traditional navigation systems use 2D screens to display instrument positions causing the surgeons to look away from the operative field...conference paper 2022
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López-Portillo, José A. (author), Casasola-Rodríguez, Iván G. (author), Escalante-Ramírez, Boris (author), Olveres, Jimena (author), Arriaga, Jaime (author), Appendini, Christian (author)Sargassum has affected the Mexican Caribbean coasts since 2015 in atypical amounts, causing economic and ecological problems. Removal once it reaches the coast is complex since it is not easily separated from the sand, damaging dune vegetation, heavy transport compacts the sand and further deteriorates the coastline. Therefore, it is important...conference paper 2022
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Wang, X. (author), Benedictus, R. (author), Groves, R.M. (author)The plasmon resonance spectral peak of a gold spherical nanoparticle (NP) will shift when the NP shape is changed from sphere to spheroid. This may be used as a novel strain detection method with gold NPs embedded in a medium of different refractive index (RI). Applying a strain to the external medium will cause a change in the shape of the...conference paper 2022
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Soloviev, O.A. (author), Noom, J. (author), Nguyen, Hieu Thao (author), Vdovin, Gleb (author), Verhaegen, M.H.G. (author)We investigate the general adjustment of projection-based phase retrieval algorithms for use with saturated data. In the phase retrieval problem, model fidelity of experimental data containing a non-zero background level, fixed pattern noise, or overexposure, often presents a serious obstacle for standard algorithms. Recently, it was shown...conference paper 2022
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Dushatskiy, A. (author), Lowe, Gerry (author), Bosman, P.A.N. (author), Alderliesten, T. (author)Deep learning algorithms have become the golden standard for segmentation of medical imaging data. In most works, the variability and heterogeneity of real clinical data is acknowledged to still be a problem. One way to automatically overcome this is to capture and exploit this variation explicitly. Here, we propose an approach that improves...conference paper 2022
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Bosma, Martijn M.A. (author), Dushatskiy, A. (author), Grewal, M. (author), Alderliesten, T. (author), Bosman, P.A.N. (author)Deep Neural Networks (DNNs) have the potential for making various clinical procedures more time-efficient by automating medical image segmentation. Due to their strong, in some cases human-level, performance, they have become the standard approach in this field. The design of the best possible medical image segmentation DNNs, however, is task...conference paper 2022
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Taskin, U. (author), Suzuki, Atsuro (author), Terada, Takahide (author), Tsubota, Yushi (author), van Dongen, K.W.A. (author)Quantitative images showing the speed of sound proffle of the breast may be obtained by employing full-waveform inversion (FWI) methods on the measured data. These reconstruction methods work well for both dense and normal breasts. Contrast source inversion (CSI) is a frequency domain FWI method. In literature, many examples of successful...conference paper 2022
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van der Sar, S.J. (author), Leibold, D. (author), Brunner, Stefan E. (author), Schaart, D.R. (author)We investigate fast silicon photomultiplier (SiPM)-based scintillation detectors for X-ray photon-counting applications, e.g., photon-counting computed tomography (CT). Such detectors may be an alternative to CdTe/CdZnTe (CZT) and Si detectors, which face challenges related to availability and cost-effective growth of detector-grade material,...conference paper 2022
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Mulder, W. (author), Patty, C. H.Lucas (author), Spadaccia, Stefano (author), Pommerol, Antoine (author), Demory, Brice Olivier (author), Keller, Christoph U. (author), Kühn, Jonas G. (author), Snik, Frans (author), Stam, D.M. (author)Does life exist outside our Solar System A first step towards searching for life outside our Solar System is detecting life on Earth by using remote sensing applications. One powerful and unambiguous biosignature is the circular polarization resulting from the homochirality of biotic molecules and systems. We aim to investigate the...conference paper 2022
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Defrère, Denis (author), Bigioli, A. (author), Dandumont, C. (author), Laugier, Romain (author), Garreau, G. (author), Ireland, M. (author), Berger, Jean Philippe (author), Courtney-Barrer, Benjamin (author), Loicq, J.J.D. (author)Hi-5 is the L’-band (3.5-4.0 μm) high-contrast imager of Asgard, an instrument suite in preparation for the visitor focus of the VLTI. The system is optimized for high-contrast and high-sensitivity imaging within the diffraction limit of a single UT/AT telescope. It is designed as a double-Bracewell nulling instrument producing spectrally...conference paper 2022
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Dandumont, C. (author), Laugier, Romain (author), Emsenhuber, Alexandre (author), Gagne, Jonathan (author), Absil, Olivier (author), Garreau, G. (author), Bonavita, M. (author), Bigioli, A. (author), Loicq, J.J.D. (author)The Hi-5 instrument, a proposed high-contrast L' band (3.5-4.0 μm) nulling interferometer for the visitor focus of the Very Large Telescope Interferometer (VLTI), will characterize young extra-solar planetary systems and exozodiacal dust around nearby main-sequence stars. Thanks to VLTI's angular resolution (λ=B = 5 mas for the longest UT...conference paper 2022
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Dandumont, C. (author), Mazzoli, A. (author), Laborde, Victor (author), Laugier, Romain (author), Bigioli, A. (author), Garreau, G. (author), Gross, S. (author), Ireland, M. (author), Loicq, J.J.D. (author)Hi-5 is a proposed L' band high-contrast nulling interferometric instrument for the visitor focus of the Very Large Telescope Interferometer (VLTI). As a part of the ERC consolidator project called SCIFY (Self-Calibrated Interferometry For exoplanet spectroscopY), the instrument aims to achieve sufficient dynamic range and angular resolution to...conference paper 2022
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Vilaboa Pérez, Jesús (author), Georges, Marc (author), Lenaerts, Cédric (author), Loicq, J.J.D. (author)We describe the state of development of a white light interferometer to characterize the cryogenic mirrors for GW detector on operation. We include the first experimental results from the proof of concept of the metrology instrument. The instrument will characterize the topology as well as the vibration of the mirrors. This development takes...conference paper 2022
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Noom, J. (author), Soloviev, O.A. (author), Smith, C.S. (author), Verhaegen, M.H.G. (author)Some applications require high level of image-based classification certainty while keeping the total illumination energy as low as possible. Examples are minimally invasive visual inspection in Industry 4.0, and medical imaging systems such as computed tomography, in which the radiation dose should be kept “as low as is reasonably achievable”...conference paper 2022
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Xia, Fei (author), Gevers, Monique (author), Fognini, Andreas (author), Mok, Aaron T. (author), Li, Bo (author), Akabri, Najva (author), Esmaeil Zadeh, I.Z. (author), Qin-Dregely, Y. (author), Xu, Chris (author)Using short-wave infrared wavelength advantages, we demonstrate one-photon fluorescence confocal microscopy of adult mouse brains with penetration depths up to 1.7mm. This is achieved by labeling quantum dots with 1300 nm excitation and 1700 nm emission and detecting them with a single-photon superconducting nanowire detector.conference paper 2022