Searched for: author%3A%22Van+der+Steen%2C+A.F.W.%22
(1 - 14 of 14)
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Caenen, Annette (author), Keijzer, Lana (author), Bézy, Stéphanie (author), Duchenne, Jürgen (author), Orlowska, Marta (author), van der Steen, A.F.W. (author), de Jong, N. (author), Bosch, Johan G. (author), Voigt, Jens Uwe (author), D’hooge, Jan (author), Vos, H.J. (author)
Ultrasound-based shear wave elastography is a promising technique to non-invasively assess the dynamic stiffness variations of the heart. The technique is based on tracking the propagation of acoustically induced shear waves in the myocardium of which the propagation speed is linked to tissue stiffness. This measurement is repeated multiple...
journal article 2023
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Voorneveld, J.D. (author), Keijzer, L.B.H. (author), Strachinaru, Mihai (author), Bowen, Daniel J. (author), Mutluer, Ferit O. (author), van der Steen, A.F.W. (author), Ten Cate, Folkert (author), de Jong, N. (author), Vos, H.J. (author), Van den Bosch, Annemien E. (author), Bosch, Johan G. (author)
High-frame-rate (HFR) echo-particle image velocimetry (echoPIV) is a promising tool for measuring intracardiac blood flow dynamics. In this study, we investigate the optimal ultrasound contrast agent (UCA: SonoVue) infusion rate and acoustic output to use for HFR echoPIV (PRF = 4900 Hz) in the left ventricle (LV) of patients. Three infusion...
journal article 2021
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Zangabad, Reza Pakdaman (author), Bosch, Johan G. (author), Mastik, Frits (author), Beurskens, Robert H.S.H. (author), Henneken, Vincent A. (author), Weekamp, Johannes W. (author), van der Steen, A.F.W. (author), van Soest, Gijs (author)
Intravascular ultrasound (IVUS) is a well-established diagnostic method that provides images of the vessel wall and atherosclerotic plaques. We investigate the potential for phased-array IVUS utilizing coded excitation (CE) for improving the penetration depth and image signal-to-noise ratio (SNR). It is realized on a new experimental...
journal article 2021
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Voorneveld, J.D. (author), Saaid, H. (author), Schinkel, C.V. (author), Radeljic, Nikola (author), Lippe, Boris (author), Gijsen, F.J.H. (author), van der Steen, A.F.W. (author), de Jong, N. (author), Claessens, Tom (author), Vos, H.J. (author), Kenjeres, S. (author), Bosch, Johan G. (author)
Left ventricular (LV) blood flow is an inherently complex time-varying 3-D phenomenon, where 2-D quantification often ignores the effect of out-of-plane motion. In this study, we describe high frame rate 4-D echocardiographic particle image velocimetry (echo-PIV) using a prototype matrix transesophageal transducer and a dynamic LV phantom for...
journal article 2020
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Keijzer, Lana B.H. (author), Caenen, A.F.M. (author), Voorneveld, J.D. (author), Strachinaru, Mihai (author), Bowen, Daniel J. (author), van der Steen, A.F.W. (author), de Jong, N. (author), Bosch, Johan G. (author), Vos, H.J. (author)
Natural and active shear wave elastography (SWE) are potential ultrasound-based techniques to non-invasively assess myocardial stiffness, which could improve current diagnosis of heart failure. This study aims to bridge the knowledge gap between both techniques and discuss their respective impacts on cardiac stiffness evaluation. We recorded...
journal article 2020
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Keijzer, L.B.H. (author), Strachinaru, Mihai (author), Bowen, Dan J. (author), Geleijnse, Marcel L. (author), van der Steen, A.F.W. (author), Bosch, Johan G. (author), de Jong, N. (author), Vos, H.J. (author)
For the quantification of myocardial function, myocardial stiffness can potentially be measured non-invasively using shear wave elastography. Clinical diagnosis requires high precision. In 10 healthy volunteers, we studied the reproducibility of the measurement of propagation speeds of shear waves induced by aortic and mitral valve closure ...
journal article 2019
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Generowicz, B.S. (author), Leus, G.J.T. (author), Tbalvandanv, S. Soloukey (author), Van Hoogstraten, W. S. (author), Strvdis, C. (author), Bosch, J. G. (author), van der Steen, A.F.W. (author), De Zeeuwl, C. I. (author), Koekkoek, S. K.E. (author), Kruizinga, P. (author)
Current methods to measure blood flow using ultrafast Doppler imaging often make use of a Singular Value Decomposition (SVD). The SVD has been shown to be an effective way to remove clutter signals associated with slow moving tissue. Conventionally, the SVD is calculated from an ensemble of frames, after which the first dominant eigenvectors...
conference paper 2018
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Janjic, Jovana (author), Kruizinga, P. (author), van der Meulen, P.Q. (author), Springeling, Geert (author), Mastik, Frits (author), Leus, G.J.T. (author), Bosch, Johan G. (author), van der Steen, A.F.W. (author), van Soest, G. (author)
We present a form of acoustic microscopy, called Structured Ultrasound Microscopy (SUM). It creates a volumetric image by recording reflected echoes of ultrasound waves with a structured phase front using a moving single-element transducer and computational reconstruction. A priori knowledge of the acoustic field produced by the single...
journal article 2018
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Bera, D. (author), Raghunathan, S.B. (author), Chen, C. (author), Chen, Z. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author), Daeichin, V. (author), Vos, H.J. (author), van der Steen, A.F.W. (author), de Jong, N. (author), Bosch, J.G. (author)
Until now, no matrix transducer has been realized for 3D transesophageal echocardiography (TEE) in pediatric patients. In 3D TEE with a matrix transducer, the biggest challenges are to connect a large number of elements to a standard ultrasound system, and to achieve a high volume rate (>200 Hz). To address these issues, we have recently...
journal article 2018
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Bera, D. (author), Van Den Adel, Franc (author), Radeljic-Jakic, Nikola (author), Lippe, Boris (author), Soozande, M. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author), Kruizinga, P. (author), Daeichin, V. (author), Vos, H.J. (author), van der Steen, A.F.W. (author), Bosch, Johan G. (author), de Jong, N. (author)
We describe a 3-D multiline parallel beamforming scheme for real-time volumetric ultrasound imaging using a prototype matrix transesophageal echocardiography probe with diagonally diced elements and separated transmit and receive arrays. The elements in the smaller rectangular transmit array are directly wired to the ultrasound system. The...
journal article 2018
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Strachinaru, Mihai (author), Bosch, Johan G. (author), van Dalen, Bas M. (author), van Gils, Lennart (author), van der Steen, A.F.W. (author), de Jong, N. (author), Geleijnse, Marcel L. (author), Vos, H.J. (author)
The propagation velocity of shear waves relates to tissue stiffness. We prove that a regular clinical cardiac ultrasound system can determine shear wave velocity with a conventional unmodified tissue Doppler imaging (TDI) application. The investigation was performed on five tissue phantoms with different stiffness using a research platform...
journal article 2017
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Vos, H.J. (author), van Dalen, Bas M. (author), Heinonen, Ilkka (author), Bosch, Johan G. (author), Sorop, Oana (author), Duncker, Dirk J. (author), van der Steen, A.F.W. (author), de Jong, N. (author)
Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate...
journal article 2017
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Daeichin, Verya (author), van Rooij, Tom (author), Skachkov, Ilya (author), Ergin, Bulent (author), Specht, Patricia A.C. (author), Lima, Alexandre (author), Ince, Can (author), Bosch, Johan G. (author), van der Steen, A.F.W. (author), de Jong, N. (author), Kooiman, Klazina (author)
Although high-frequency ultrasound imaging is gaining attention in various applications, hardly any ultrasound contrast agents (UCAs) dedicated to such frequencies (>15 MHz) are available for contrast-enhanced ultrasound (CEUS) imaging. Moreover, the composition of the limited commercially available UCAs for high-frequency CEUS (hfCEUS) is...
journal article 2017
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Kruizinga, P. (author), Mastik, Frits (author), van den Oord, Stijn C.H. (author), Schinkel, Arend F.L. (author), Bosch, Johannes G. (author), de Jong, N. (author), van Soest, G. (author), van der Steen, A.F.W. (author)
The carotid artery (CA) is central to cardiovascular research, because of the clinical relevance of CA plaques as culprits of stroke and the accessibility of the CA for cardiovascular screening. The viscoelastic state of this artery, essential for clinical evaluation, can be assessed by observing arterial deformation in response to the...
journal article 2014
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