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Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Noothout, E.C. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author)Common clamp-on ultrasonic flow meters consist of two single-element transducers placed on the pipe wall. Flow speed is measured noninvasively, i.e., without interrupting the flow and without perforating the pipe wall, which also minimizes safety risks and avoids pressure drops inside the pipe. However, before metering, the transducers have to...article 2022
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Westerneng, M. (author), de Jonge, A. (author), van Baar, A.L. (author), Witteveen, A.B. (author), Jellema, P. (author), Paarlberg, K.M. (author), Rijnders, M. (author), van der Horst, H.E. (author)Background: Third-trimester routine ultrasounds are increasingly offered to monitor fetal growth. In addition to limited evidence for its clinical effectiveness, little is known about its importance for pregnancy-specific anxiety and mother-to-infant bonding. Methods: 1275 low-risk women participated in a Dutch nationwide pragmatic cluster...article 2022
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- Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author) article 2022
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Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author)Current ultrasonic clamp-on flow meters consist of a pair of single-element transducers which are carefully positioned before use. This positioning process consists of manually finding the distance between the transducer elements, along the pipe axis, for which maximum SNR is achieved. This distance depends on the sound speed, thickness and...article 2021
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Ferguson, K.K. (author), Sammallahti, S. (author), Rosen, E. (author), van den Dries, M. (author), Pronk, A. (author), Spaan, S. (author), Guxens, M. (author), Tiemeier, H. (author), Gaillard, R. (author), Jaddoe, V.W.V. (author)Background: Being born small for gestational age (SGA,article 2021
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Peters, L.C.J.M. (author), Ollearo, R. (author), Verbeek, R.G.F.A. (author), van der Steen, J.L.P.J. (author), Akkerman, H.B. (author), Volker, A.W.F. (author), van Neer, P.L.M.J. (author), Gelinck, G.H. (author)Large-area flexible ultrasound arrays can offer new ultrasound modalities in multiple fields. The production of these arrays when using CMOS-type fabrication techniques faces scalability challenges and costs increase dramatically when upscaled to large dimensions. We investigate the monolithic production of large-area PPT (Printed Polymer...conference paper 2019
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- Tronci, S. (author), van Neer, P.L.M.J. (author), Giling, E.J.M. (author), Stelwagen, U. (author), Piras, D. (author), Mei, R. (author), Corominas, F. (author), Grosso, M. (author) article 2019
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Rajadurai, S.R.S. (author), Piras, D. (author), Hatakeyama, K. (author), van Neer, P.L.M.J. (author), van Es, M.H. (author), van der Lans, M.J. (author)This technique uses an Atomic force microscope (AFM) to map the elastic properties of buried materials with high spatial resolution. Ultrasound excitation is applied to the tip-sample interface in the AFM, while the probe’s dynamic response is monitored. The excitation is a carrier of high frequency fc, that is amplitude-modulated at a lower...other 2019
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van Neer, P.L.M.J. (author), Volker, A.W.F. (author), Berkhoff, A.P. (author), Akkerman, H.B. (author), Schrama, T. (author), van Breemen, A. (author), Gelinck, G.H. (author)Recently, there has been considerable interest in the development of ultrasound based mid-air haptic feedback devices. These devices allow for tactile sensations to be induced at any position and time without constraints to human motion, which is useful for virtual user interfaces, augmented/virtual reality and feedback buttons. The haptic...conference paper 2018
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van Groenestijn, G.J.A. (author), Jansen, T.H. (author), van Neer, P.L.M.J. (author), Jacobs, M.J. (author), Cheng, L.K. (author)Elastic guided waves are carriers of information of the (change in) condition of plate-like structures like windturbine blades, airplane wings and road surfaces on bridges. To measure these guided waves we do not have to use piezos. Other sensors offer interesting benefits like contactless sensing, embedding, or measuring without electricity....conference paper 2018
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Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D. (author), de Jong, N. (author), Pertijs, M. (author), Verweij, M. (author)Typically, ultrasonic flow meters assume linear wave propagation. Nevertheless, if the transducers of an ultrasonic flow sensor excite a pressure wave with a high amplitude, nonlinear wave propagation effects become significant. The appearance of higher harmonics increases the bandwidth of the received signal, which may potentially lead to a...conference paper 2018
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van Groenestijn, G.J. (author), Meulendijks, N. (author), van Ee, R. (author), Volker, A.W.F. (author), van Neer, P.L.M.J. (author), Buskens, P. (author), Julien, C. (author), Verheijen, M. (author)Both in design and production of nanoparticles and nanocomposites it is of vital importance to have information about their size and concentration. During the formation of nanoparticles, real-time monitoring of particle size and concentration during bottom-up synthesis in liquids allows for a detailed study of nucleation and growth. This...article 2018
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van Es, M.H. (author), Mohtashami, A. (author), Thijssen, R.M.T. (author), Piras, D. (author), van Neer, P.L.M.J. (author), Sadeghian, H. (author)Nondestructive subsurface nanoimaging of buried nanostructures is considered to be extremely challeng- ing and is essential for the reliable manufacturing of nanotechnology products such as three-dimensional (3D) transistors, 3D NAND memory, and future quantum electronics. In scanning probe microscopy (SPM), a microcantilever with a sharp tip...article 2018
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van Groenestijn, G.J.A. (author), Meulendiiks, N.M.M. (author), Volker, A.W.F. (author), van Neer, P.L.M.J. (author), Buskens, P.J.P. (author)Nanoparticles are applied in an increasing number of products (e.g. medicine, food and cosmetics). There is a need to real-time monitor the growth of nanoparticles during production inside the chemical reactor. However, standard particle sizing methods such as dynamic light scattering (DLS) and transmission electron microscopy (TEM) cannot do...conference paper 2018
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Piras, D. (author), Sadeghian Marnani, H. (author)Ultrasound atomic force microscopy (US-AFM) has been used for subsurface imaging of nanostructures. The contact stiffness variations have been suggested as the origin of the image contrast. Therefore, to analyze the image contrast, the local changes in the contact stiffness due to the presence of subsurface features should be calculated. So far,...article 2017
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Stegehuis, P.L. (author), Boogerd, L.S.F. (author), Inderson, A. (author), Veenendaal, R.A. (author), Bonsing, B.A. (author), Amelink, A. (author), Vahrmeijer, A.L. (author), Dijkstra, J. (author), Robinson, D.J. (author)EUS-FNA can be used for pathological confirmation of a suspicious pancreatic mass. However, performance depends on an on-site cytologist and time between punction and final pathology results can be long. SFR spectroscopy is capable of extracting biologically relevant parameters (e.g. oxygenation and blood volume) in real-time from a very small...conference paper 2016
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van Neer, P.L.M.J. (author), Volker, A.W.F. (author), Pierre, G. (author), Bouvet, F. (author), Crozat, S. (author)Nanoparticles are increasingly used in a number of applications, e.g. coatings or paints. To optimize nanoparticle production in-line quantitative measurements of their size distribution and concentration are needed. Ultrasound-based methods are especially suited for in-line particle sizing. These methods can be used for opaque dispersions and...conference paper 2014
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Pozo Torres, J.M. (author), Westerveld, W. (author), Harmsma, P.J. (author), Yang, S. (author), Bodis, P. (author), Nieuwland, R. (author), Lagioia, M. (author), Lo Cascio, D.M.R. (author), Staats, J. (author), Schmits, R. (author), Berg, H.V.D. (author), Tabak, E. (author), Green, K. (author), Urbach, H.P. (author), Cheng, L.K. (author), Yousefi, M. (author)In this paper, we present two examples of photonic sensors based on ring resonators in Silicon-on-Insulator (SOI) waveguide technology as mass production compatible sensing units for the measurement of: strain, and ultrasound. Furthermore, the sensing units are characterized in extreme conditions to validate their robustness in harsh industrial...conference paper 2011
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Bannink, E.M.N. (author), van Sassen, C. (author), van Buuren, S. (author), de Jong, F.H. (author), Lequin, M. (author), Mulder, P.G.H. (author), de Muinck Keizer-Schrama, S.M.P.F. (author), TNO Kwaliteit van Leven (author)Background: Besides short stature, gonadal dysgenesis leading to a lack of oestrogen is one of the main characteristics of Turner syndrome (TS). In most TS girls, puberty is induced with exogenous oestrogens. Objective: To describe the pubertal development and uterine dimensions achieved by low-dose 17β-oestradiol (17β-E2) orally started at an...article 2009
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Hekkenberg, R.T. (author), Richards, A. (author), Beissner, K. (author), Zeqiri, B. (author), Bezemer, R.A. (author), Hodnett, M. (author), Prout, G. (author), Cantrall, C. (author), TNO Kwaliteit van Leven (author)Ultrasound (US) physiotherapy as a clinical treatment is extremely common in the Western world. Internationally, regulation to ensure safe application of US physiotherapy by regular calibration ranges from nil to mandatory. The need for a portable power standard (PPS) has been addressed within a European Community (EC)-funded project. This PPS...article 2006
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