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Ossenkoppele, B.W. (author)High-frame-rate volumetric ultrasound imaging is highly desired to enable novel clinical ultrasound applications. However, realizing high-quality volumetric ultrasound imaging at a high frame rates (>500 Hz) is challenging. Keeping the cable count and data rate of the transducer device at a realistic level without sacrificing image quality to...doctoral thesis 2023
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Rodrigues, Estevão P. (author), Simoes dos Santos, D. (author), Buiochi, Flávio (author)The measurement of acoustic fields generated by ultrasonic transducers is important for determining the focal length, lateral resolution, and amplitudes of the lateral and grating lobes. The acoustic field is commonly characterized by a set of scans using a needle hydrophone. The output of the hydrophone can be connected to an analog filter to...journal article 2023
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Dutta, S. (author), Bieling, T.J. (author), Verbiest, G.J. (author)Fluid flow processes such as drainage and evaporation in porous media are crucial in geological and biological systems. The motion of the displacement front of a moving fluid through multi-phase interfaces is often associated with abrupt mechanical energy release, detectable as acoustic emissions (AEs). The exact origin of these pulses and...journal article 2023
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Holzapfel, L.F.M. (author), Giagka, Vasiliki (author)Implantable devices need to communicate information to the outside world. For deep-seated miniaturized implants ultrasound communication can be favourable. However, implants need to operate during movement, and the selected communication scheme should be assessed accordingly. In this work, we implemented a simple protocol to transfer data...conference paper 2023
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Hopf, Y.M. (author), Ossenkoppele, B.W. (author), Soozande, M. (author), Noothout, E.C. (author), Chang, Z.Y. (author), Vos, H.J. (author), Bosch, Johan G. (author), Verweij, M.D. (author), de Jong, N. (author), Pertijs, M.A.P. (author)In this letter, a compact high-voltage (HV) transmit circuit for dense 2-D transducer arrays used in 3-D ultrasonic imaging systems is presented. Stringent area requirements are addressed by a unipolar pulser with embedded transmit/receive switch. Combined with a capacitive HV level shifter, it forms the ultrasonic HV...journal article 2022
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Lattwein, K.R. (author), Beekers, Inés (author), Kouijzer, Joop J.P. (author), Leon-Grooters, Mariël (author), Langeveld, Simone A.G. (author), van Rooij, Tom (author), van der Steen, A.F.W. (author), de Jong, N. (author), van Wamel, Willem J.B. (author), Kooiman, Klazina (author)Bacteria encased in a biofilm poses significant challenges to successful treatment, since both the immune system and antibiotics are ineffective. Sonobactericide, which uses ultrasound and microbubbles, is a potential new strategy for increasing antimicrobial effectiveness or directly killing bacteria. Several studies suggest that...journal article 2022
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Chen, Peiran (author), Calis, Metin (author), Wijkstra, Hessel (author), Huang, Pintong (author), Hunyadi, Borbala (author), Mischi, Massimo (author)A cost-effective, widely available, and practical diagnostic imaging tool for prostate cancer (PCa) localization is still lacking. Recently, the contrast-ultrasound dispersion imaging (CUDI) technique has been developed for PCa localization by quantifying dynamic contrast-enhanced ultrasound (DCE-US) acquisitions. Tissue stiffness is an...conference paper 2022
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de Maar, Josanne S. (author), Rousou, Charis (author), van Elburg, Benjamin (author), Vos, H.J. (author), Lajoinie, Guillaume P.R. (author), Bos, Clemens (author), Moonen, Chrit T.W. (author), Deckers, Roel (author)Chemotherapy efficacy is often reduced by insufficient drug uptake in tumor cells. The combination of ultrasound and microbubbles (USMB) has been shown to improve drug delivery and to enhance the efficacy of several drugs in vitro and in vivo, through effects collectively known as sonopermeation. However, clinical translation of USMB therapy...journal article 2021
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Sánchez-Margallo, Juan A. (author), Tas, L. (author), Moelker, Adriaan (author), van den Dobbelsteen, J.J. (author), Sánchez-Margallo, Francisco M. (author), Langø, Thomas (author), van Walsum, T. (author), van de Berg, N.J. (author)Purpose: To present a novel methodical approach to compare visibility of percutaneous needles in ultrasound images. Methods: A motor-driven rotation platform was used to gradually change the needle angle while capturing image data. Data analysis was automated using block-matching-based registration, with a tracking and refinement step. Every...journal article 2021
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Guvenir Torun, Su (author), Torun, Hakki M. (author), Hansen, Hendrik H.G. (author), Gandini, Giulia (author), Berselli, Irene (author), Codazzi, Veronica (author), de Korte, Chris L. (author), van der Steen, A.F.W. (author), Migliavacca, Francesco (author), Chiastra, Claudio (author), Akyildiz, A.C. (author)Atherosclerotic plaque rupture in coronary arteries, an important trigger of myocardial infarction, is shown to correlate with high levels of pressure-induced mechanical stresses in plaques. Finite element (FE) analyses are commonly used for plaque stress assessment. However, the required information of heterogenous material properties of...journal article 2021
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van Willigen, D.M. (author), Kang, E. (author), Janjic, Jovana (author), Noothout, E.C. (author), Chang, Z.Y. (author), Verweij, M.D. (author), de Jong, N. (author), Pertijs, M.A.P. (author)This article presents an application-specific integrated circuit (ASIC) designed for intra-vascular ultrasound imaging that interfaces 64 piezoelectric transducer elements to an imaging system using a single micro-coaxial cable. Thus, it allows a single-element transducer to be replaced by a transducer array to enable 3-D imaging. The 1.5-mm...journal article 2021
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Siddiqi, M.A. (author), Beurskens, Robert H.S.H. (author), Kruizinga, Pieter (author), De Zeeuw, Chris I. (author), Strydis, C. (author)Modern Implantable Medical Devices (IMDs) are vulnerable to security attacks because of their wireless connectivity to the outside world. One of the main security challenges is establishing trust between the IMD and an external reader/programmer in order to facilitate secure communication. Numerous device-pairing schemes have been proposed to...journal article 2021
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Thota Radhakrishnan, A.K. (author), Poelma, C. (author), van Lier, J.B. (author), Clemens, F.H.L.R. (author)Transition from laminar to turbulent flow of non-Newtonian fluids is investigated using velocimetry data. These data are obtained by applying particle image velocimetry to images obtained through ultrasound imaging (echography). This yielded the observation of intermittent structures (puffs and slugs) that are formed during transition. Post...journal article 2020
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Weide, Guido (author), Huijing, Peter A. (author), Bar-On, Lynn (author), Sloot, Lizeth (author), Buizer, Annemieke I. (author), Becher, Jules G. (author), Harlaar, J. (author), Jaspers, Richard T. (author)Gait of children with spastic paresis (SP) is frequently characterized by a reduced ankle range of motion, presumably due to reduced extensibility of the triceps surae (TS) muscle. Little is known about how morphological muscle characteristics in SP children are affected. The aim of this study was to compare gastrocnemius medialis (GM) muscle...journal article 2020
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Weide, Guido (author), Sloot, Lizeth (author), Oudenhoven, Laura (author), Jaspers, Richard T. (author), Harlaar, J. (author), Buizer, Annemieke (author), Bar-On, Lynn (author)Comprehensive instrumented muscle and joint assessments should be considered when prescribing Botulinum NeuroToxin-A (BoNT-A) treatment in spastic paresis. In a child with spastic paresis, comprehensive evaluation following treatment with BoNT-A, serial casting, and physiotherapy showed that short-term improvements in gait occurred without...journal article 2019
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Massaad Mouawad, J.M. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (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 Groeningen, T. (author), Driessen, J.N. (author), Söhl, J. (author), Voûte, R.L. (author)When the fire brigade arrives at a burning building, it is of vital importance that people who are still inside can quickly be found. Smart buildings should be able to expose this location data to the fire brigade working in a smart city. In this paper the feasibility is researched of using ultrasonic sound sensors for human presence detection...journal article 2018
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Deckers, S. (author), Van Steerteghem, Nick (author), Glorieux, Christ (author), Verbiest, Thierry (author), van der Veen, M.A. (author)We studied the effects of two types of ultrasonic waves, shear waves and longitudinal waves, using two nonlinear optical techniques, second-harmonic generation and hyper-Rayleigh scattering. Since shear waves hardly propagate in liquids, their influence on molecules at the interface between a surface and a liquid was studied using second...conference paper 2016
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Joshi, S. (author), Savov, A.M. (author), Dekker, R. (author)This paper focuses on the implementation of a new technique for the fabrication of stretchable electronic patches that can be used for medical applications. The technique is based on the Electronics on Plastics by Laser Release (EPlaR) technology which enables a one-step release of a stack of flexible/stretchable layers incorporating the active...journal article 2016
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Bolsterlee, B. (author)Insight into the mechanical interaction between muscles and bones can be of great help to understand normal function of the human body and to improve diagnoses and treatments of musculoskeletal disorders. This research presented in this thesis aims to improve the predictions of a musculoskeletal model of the shoulder and elbow (the Delft...doctoral thesis 2014
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