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Zandbergen, T. (author), Martlew, D.L. (author)The National Aerospace Laboratory NLR in the Netherlands and the National Gas Turbine Establishment NOTE operate similar acoustic flow duct facilities but with differences in their respective approaches to the measurement of attenuation and impedance of duct linings. A joint exercise was arranged with the object of comparing methods and results,...report 1981
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van Schaik, F.J. (author), Storm van Leeuwen, S. (author)The transducer selection process as applied to the F29 digital data-acquisition system is discussed in detail. The selection procedure consists of interviews of the users of the system, specification of the transducer part of the data-acquisition system, transducer selection from manufacturer data, evaluation tests, integration into the data...report 1981
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- Breeman, J.H. (author) report 1983
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- Zou, Z.H. (author), Fokkema, J.T. (author), Baeten, G.J.M. (author), Ziolkowski, A.M. (author) conference paper 1990
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- Zhu, F. (author) doctoral thesis 1992
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- Van Duyn, D.C. (author) doctoral thesis 1993
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- van Gestel, H.C.J.M. (author) doctoral thesis 1994
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- Bonse, M.H.W. (author) doctoral thesis 1995
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- Van der Lingen, K., (author) doctoral thesis 1996
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- Van der Goes, F.M.L. (author) doctoral thesis 1996
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- Van der Wulp, H. (author) doctoral thesis 1997
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- Bakker, M.C.M. (author) doctoral thesis 2000
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Huijssen, J. (author), Verweij, M.D. (author)The development and optimization of medical ultrasound transducers and imaging modalities require a computational method that accurately predicts the nonlinear acoustic pressure field. A prospective method should provide the wide-angle, pulsed field emitted by an arbitrary planar source distribution and propagating in a three-dimensional, large...journal article 2010
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Wu, R. (author), Chae, Y. (author), Huijsing, J.H. (author), Makinwa, K.A.A. (author)This paper presents a 20-b read-out IC with ±40-mV full-scale range that is intended for use with bridge transducers. It consists of a current-feedback instrumentation amplifier (CFIA) followed by a switched-capacitor incremental ΔΣ ADC. The CFIA's offset and 1/ <i>f</i> noise are mitigated by chopping, while its gain accuracy and gain drift are...journal article 2012
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Maresca, D. (author), Jansen, K. (author), Renaud, G. (author), Van Soest, G. (author), Li, X. (author), Zhou, Q. (author), De Jong, N. (author), Shung, K.K. (author), Van der Steen, A.F.W. (author)We demonstrate the feasibility of intravascular ultrasound (IVUS) chirp imaging as well as chirp reversal ultrasound contrast imaging at intravascular ultrasound frequency. Chirp excitations were emitted with a 34?MHz single crystal intravascular transducer and compared to conventional Gaussian-shaped pulses of equal acoustic pressure. The...journal article 2012
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Alles, E.J. (author)Intravascular ultrasound (IVUS) is a medical imaging modality aimed at imaging blood vessel walls from within the vessel. Current commercial IVUS catheters are designed to yield two-dimensional cross-sectional images perpendicular to the vessel wall. By pulling the catheter back through the artery (in the ‘axial direction’), and stacking the...doctoral thesis 2012
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Westerveld, W.J. (author)We demonstrated that photonic micro-ring resonators can be used in micro-machined ultrasound microphones. This might cause a breakthrough in array transducers for ultrasonography; first because optical multiplexing allows array interrogation via one optical fiber and second because the silicon-on-insulator technology allows cost-effective...doctoral thesis 2014
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Chen, C. (author), Chen, Z. (author), Chang, Z.Y. (author), Pertijs, M.A.P. (author)This paper presents a power- and area-efficient 9-channel LNA array for piezoelectric ultrasound transducers to enable real-time 3D imaging with miniature endoscopic and catheter-based probes. In view of the relatively low impedance of piezoelectric transducers, the LNA is implemented as a capacitive feedback voltage amplifier, rather than a...conference paper 2015
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Ramirez, Ana B (author), van Dongen, K.W.A. (author)The design of ultrasound scanning systems for applications such as breast cancer detection is a challenging task, especially when the number of sources and receivers increases and they become spread over a large surface. In order to determine the number of transducers and above all their position, several approaches could be followed. A simple...conference paper 2016
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Šmíd, R. (author), Hänsel, A. (author), Pravdová, L. (author), Sobota, J. (author), Cíp, O. (author), Bhattacharya, N. (author)In this work we present a design of an external optical cavity based on Fabry-Perot etalons applied to a 100 MHz Er-doped fiber optical frequency comb working at 1560 nm to increase its repetition frequency. A Fabry-Perot cavity is constructed based on a transportable cage system with two silver mirrors in plano-concave geometry including the...journal article 2016