Searched for: subject:"Transducers"
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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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Zou, Z.H. (author), Fokkema, J.T. (author), Baeten, G.J.M. (author), Ziolkowski, A.M. (author)
conference paper 1990
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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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Van der Lingen, K., (author)
doctoral thesis 1996
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Zhu, F. (author)
doctoral thesis 1992
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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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Bonse, M.H.W. (author)
doctoral thesis 1995
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Van Duyn, D.C. (author)
doctoral thesis 1993
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Van der Wulp, H. (author)
doctoral thesis 1997
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van Gestel, H.C.J.M. (author)
doctoral thesis 1994
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Van der Goes, F.M.L. (author)
doctoral thesis 1996
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Bakker, M.C.M. (author)
doctoral thesis 2000
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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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Lajoinie, Guillaume (author), Lee, Jeong Yu (author), Owen, Joshua (author), Kruizinga, P. (author), de Jong, N. (author), Van Soest, Gijs (author), Stride, Eleanor (author), Versluis, Michel (author)
Photoacoustic (PA) imaging offers several attractive features as a biomedical imaging modality, including excellent spatial resolution and functional information such as tissue oxygenation. A key limitation, however, is the contrast to noise ratio that can be obtained from tissue depths greater than 1-2 mm. Microbubbles coated with an...
journal article 2017
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Janjic, Jovana (author), Tan, M. (author), Daeichin, V. (author), Noothout, E.C. (author), Chen, C. (author), Chen, Z. (author), Chang, Z.Y. (author), Beurskens, Robert H.S.H. (author), van Soest, G. (author), van der Steen, A.F.W. (author), Verweij, M.D. (author), Pertijs, M.A.P. (author), de Jong, N. (author)
Intravascular ultrasound is an imaging modality used to visualize atherosclerosis from within the inner lumen of human arteries. Complex lesions like chronic total occlusions require forward-looking intravascular ultrasound (FL-IVUS), instead of the conventional side-looking geometry. Volumetric imaging can be achieved with 2D array...
journal article 2018
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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
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Daeichin, V. (author), Bera, D. (author), Raghunathan, S.B. (author), Shabanimotlagh, M. (author), Chen, Z. (author), Chen, C. (author), Noothout, E.C. (author), Vos, H.J. (author), Pertijs, M.A.P. (author), de Jong, N. (author), Verweij, M.D. (author)
This paper presents the design, fabrication and characterization of a miniature PZT-on-CMOS matrix transducer for real-time pediatric 3-dimensional (3D) transesophageal echocardiography (TEE). This 3D TEE probe consists of a 32 × 32 array of PZT elements integrated on top of an Application Specific Integrated Circuit (ASIC). We propose a...
journal article 2018
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Chen, C. (author), Chen, Z. (author), Bera, Deep (author), Raghunathan, S.B. (author), Shabanimotlagh, M. (author), Noothout, E.C. (author), Chang, Z.Y. (author), Ponte, Jacco (author), Prins, Christian (author), Vos, H.J. (author), Bosch, J.G. (author), Verweij, M.D. (author), de Jong, N. (author), Pertijs, M.A.P. (author)
This paper presents a power-and area-efficient front-end application-specific integrated circuit (ASIC) that is directly integrated with an array of 32 × 32 piezoelectric transducer elements to enable next-generation miniature ultrasound probes for real-time 3-D transesophageal echocardiography. The 6.1 × 6.1 mm<sup>2</sup> ASIC, implemented...
journal article 2017
Searched for: subject:"Transducers"
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