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Atherosclerotic Plaque Component Segmentation in Combined Carotid MRI and CTA Data Incorporating Class Label Uncertainty

Van Engelen, A. (author), Niessen, W.J. (author), Klein, S. (author), Groen, H.C. (author), Verhagen, H.J.M. (author), Wentzel, J.J. (author), Van der Lugt, A. (author), De Bruijne, M. (author)

Atherosclerotic plaque composition can indicate plaque vulnerability. We segment atherosclerotic plaque components from the carotid artery on a combination of in vivo MRI and CT-angiography (CTA) data using supervised voxelwise classification. In contrast to previous studies the ground truth for training is directly obtained from 3D registration...

journal article 2014

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Entanglement Genesis by Ancilla-Based Parity Measurement in 2D Circuit QED

Saira, O.P. (author), Groen, J.P. (author), Cramer, J. (author), Meretska, M. (author), De Lange, G. (author), DiCarlo, L. (author)

We present an indirect two-qubit parity meter in planar circuit quantum electrodynamics, realized by discrete interaction with an ancilla and a subsequent projective ancilla measurement with a dedicated, dispersively coupled resonator. Quantum process tomography and successful entanglement by measurement demonstrate that the meter is...

journal article 2014

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Can DCE-MRI explain the heterogeneity in radiopeptide uptake imaged by SPECT in a pancreatic neuroendocrine tumor model?

Bol, K. (author), Haeck, J.C. (author), Groen, H.C. (author), Niessen, W.J. (author), Bernsen, M.R. (author), De Jong, M. (author), Veenland, J.F. (author)

Although efficient delivery and distribution of treatment agents over the whole tumor is essential for successful tumor treatment, the distribution of most of these agents cannot be visualized. However, with single-photon emission computed tomography (SPECT), both delivery and uptake of radiolabeled peptides can be visualized in a neuroendocrine...

journal article 2013

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Partial-Measurement Backaction and Nonclassical Weak Values in a Superconducting Circuit

Groen, J.P. (author), Riste, D. (author), Tornberg, L. (author), Cramer, J. (author), De Groot, P.C. (author), Picot, T. (author), Johansson, G. (author), DiCarlo, L. (author)

We realize indirect partial measurement of a transmon qubit in circuit quantum electrodynamics by interaction with an ancilla qubit and projective ancilla measurement with a dedicated readout resonator. Accurate control of the interaction and ancilla measurement basis allows tailoring the measurement strength and operator. The tradeoff between...

journal article 2013

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Probing Dynamics of an Electron-Spin Ensemble via a Superconducting Resonator

Ranjan, V. (author), De Lange, G. (author), Schutjens, R. (author), Debelhoir, T. (author), Groen, J.P. (author), Szombati, D. (author), Thoen, D.J. (author), Klapwijk, T.M. (author), Hanson, R. (author), DiCarlo, L. (author)

We study spin relaxation and diffusion in an electron-spin ensemble of nitrogen impurities in diamond at low temperature (0.25–1.2 K) and polarizing magnetic field (80–300 mT). Measurements exploit field-controlled coupling of the ensemble to two modes of a transmission-line resonator. The observed temperature-independent spin relaxation time...

journal article 2013

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Plaque characterization in ex vivo MRI evaluated by dense 3D correspondence with histology

Van Engelen, A. (author), De Bruijne, M. (author), Klein, S. (author), Verhagen, H. (author), Groen, H. (author), Wentzel, J. (author), Van der Ligt, A. (author), Niessen, W. (author)

Automatic quantification of carotid artery plaque composition is important in the development of methods that distinguish vulnerable from stable plaques. MRI has shown to be capable of imaging different components noninvasively. We present a new plaque classification method which uses 3D registration of histology data with ex vivo MRI data,...

conference paper 2011

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Mesoporous mordenite, preparation and use thereof

Groen, J.C. (author), Moulijn, J.A. (author), Perez-Ramirez, J. (author)

The invention is directed to a process for the preparation of a mesoporous mordenite, which process comprises subjecting a non-dealuminated mordenite having an atomic ratio of framework Si-to-Al of least, to an alkaline treatment in order to create mesoporosity by removal of silicon, to various mesoporous mordenites and to their use.

patent 2008

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Mesoporous zeolites obtained by desilication

Groen, J.C. (author)

Zeolites are crystalline microporous materials consisting of silicon, aluminium and oxygen atoms. A unique combination of properties such as high surface area, high (hydro)thermal stability, and strong acidity, makes that zeolites are frequently used as catalysts in various (petro)chemical processes. The pores of molecular dimensions are...

doctoral thesis 2007

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Adaptive motion compensation in sonar array processing

Groen, J. (author)

In recent years, sonar performance has mainly improved via a significant increase in array ap-erture, signal bandwidth and computational power. This thesis aims at improving sonar array processing techniques based on these three steps forward. In applications such as anti-submarine warfare and mine hunting motion of the sonar needs to be...

doctoral thesis 2006

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Scales and structures in bubbly flows. Experimental analysis of the flow in bubble columns and in bubbling fluidized beds

Groen, J.S. (author)

In this project a detailed experimental analysis was performed of the dynamic flow field in bubbly flows, with the purpose of determining local hydrodynamics and scale effects. Measurements were done in gas-liquid systems (air-water bubble columns) and in gas-solid systems (air-sand bubbing fluidized beds) of different size. Amongst others with...

doctoral thesis 2004

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Parallel recording with optical waveguide array

Wang, H. (author), Groen, F.H. (author), Pereira, S.F. (author), Braat, J.J.M. (author)

We present an analysis of the reading capability of a novel optical pickup consisting of a single-mode and a multi-mode rectangular waveguide. According to the simulations, if one has prior information about the structure of the disk, superresolution readout could be achieved. The proposed system has the advantage to be compact and should be...

conference paper 2004

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Optical waveguide focusing system with short free-working distance

Wang, H. (author), Groen, F.H. (author), Pereira, S.F. (author), Braat, J.J.M. (author)

In photonics, light usually diffracts in all directions when it emerges from a planar optical waveguide. Besides this fact, in this letter we show that a waveguide with a rectangular cross section can be turned to a focusing system by using three-dimensional self-imaging technique. We obtained a configuration where the focus of the field lies...

journal article 2003

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Direct fabrication of nanowires in an electron microscope

Silvis-Cividjian, N. (author), Hagen, C.W. (author), Kruijt, P. (author), Van der Stam, M.A.J. (author), Groen, H.B. (author)

Electron-beam-induced deposition (EBID) is a potentially fast and resistless deposition technique which might overcome the fundamental resolution limits of conventional electron-beam lithography. We advance the understanding of the EBID process by simulating the structure growth. The merit of our model is that it explains the shapes of...

journal article 2003

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Macromixing in bioreactors

Groen, D.J. (author)

doctoral thesis 1994

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De productie van vinylacetaat door oxidatieve verestering van etheen in de gasfase

Van der Wijk, P.T. (author), Groen, J.S. (author)

Document(en) uit de collectie Chemische Procestechnologie

report 1991

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Hydroformylation over heterogenized rhodium complexes