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Adjuvant holmium-166 radioembolization after radiofrequency ablation in early-stage hepatocellular carcinoma patients: a dose-finding study (HORA EST HCC trial)

Hendriks, P. (author), Rietbergen, Daphne D.D. (author), van Erkel, Arian R. (author), Coenraad, Minneke J. (author), Arntz, Mark J. (author), Bennink, Roel J. (author), Braat, Andries E. (author), de Geus-Oei, L.F. (author), Burgmans, M.C. (author)

Purpose: The aim of this study was to investigate the biodistribution of (super-)selective trans-arterial radioembolization (TARE) with holmium-166 microspheres (¹⁶⁶Ho-MS), when administered as adjuvant therapy after RFA of HCC 2–5 cm. The objective was to establish a treatment volume absorbed dose that results in an absorbed dose...

journal article 2024

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Double Zernike expansion of the optical aberration function from its power series expansion

Braat, J.J.M. (author), Janssen, A.J.E.M. (author)

Various authors have presented the aberration function of an optical system as a power series expansion with respect to the ray coordinates in the exit pupil and the coordinates of the intersection point with the image field of the optical system. In practical applications, for reasons of efficiency and accuracy, an expansion with the aid of...

journal article 2013

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High-accuracy long-distance measurements in air with a frequency comb laser

Cui, M. (author), Zeitouny, M.G. (author), Bhattacharya, N. (author), Van den Berg, S.A. (author), Urbach, H.P. (author), Braat, J.J.M. (author)

We experimentally demonstrate that a femtosecond frequency comb laser can be applied as a tool for longdistance measurement in air. Our method is based on the measurement of cross correlation between individual pulses in a Michelson interferometer. From the position of the correlation functions, distances of up to 50 m have been measured. We...

journal article 2009

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Vectorial aerial-image computations of three-dimensional objects based on the extended Nijboer–Zernike theory

Van Haver, S. (author), Braat, J.J.M. (author), Janssen, A.J.E.M. (author), Janssen, O.T.A. (author), Pereira, S.F. (author)

We present details of a novel imaging algorithm based on the extended Nijboer–Zernike (ENZ) theory of diffraction. We derive integral expressions relating the electric field distribution in the entrance pupil of an optical system to the electric field in its focal region. The evaluation of these integrals is made possible by means of a highly...

journal article 2009

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General polarized ray-tracing method for inhomogeneous uniaxially anisotropic media

Sluijter, M. (author), De Boer, D.K.G. (author), Braat, J.J.M. (author)

Uniaxial optical anisotropy in the geometrical-optics approach is a classical problem, and most of the theory has been known for at least fifty years. Although the subject appears frequently in the literature, wave propagation through inhomogeneous anisotropic media is rarely addressed. The rapid advances in liquid-crystal lenses call for a good...

journal article 2008

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Optimum synthetic-aperture imaging of extended astronomical objects

Van der Avoort, C. (author), Pereira, S.F. (author), Braat, J.J.M. (author), Den Herder, J.W. (author)

In optical aperture-synthesis imaging of stellar objects, different beam combination strategies are used and proposed. Coaxial Michelson interferometers are very common and a homothetic multiaxial interferometer is recently realized in the Large Binocular Telescope. Laboratory experiments have demonstrated the working principles of two new...

journal article 2007

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Polarization nulling interferometry for exoplanet detection

Spronck, J. (author), Pereira, S.F. (author), Braat, J.J.M. (author)

We introduce a new concept of nulling interferometer without any achromatic device, using polarization properties of light. This type of interferometer should enable a high rejection ratio in a theoretically unlimited spectral band. We analyze several consequences of the proposed design, notably, the possibility of fast internal modulation.

journal article 2006

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Liquid deformable mirror for high-order wavefront correction

Vuelban, E.M. (author), Bhattacharya, N. (author), Braat, J.J.M. (author)

We propose and demonstrate a novel liquid deformable mirror, based on electrocapillary actuation, for highorder wavefront correction. The device consists of a two-dimensional array of vertically oriented microchannels filled with two immiscible liquids, an aqueous electrolyte, and a viscous dielectric liquid, where the dielectric liquid...

journal article 2006

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Chromatism compensation in wide-band nulling interferometry for exoplanet detection

Spronck, J. (author), Pereira, S.F. (author), Braat, J.J.M. (author)

We introduce the concept of chromatism compensation in nulling interferometry that enables a high rejection ratio in a wide spectral band. Therefore the achromaticity condition considered in most nulling interferometers can be relaxed. We show that this chromatism compensation cannot be applied to a two-beam nulling interferometer, and we make...

journal article 2006

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Estimating resist parameters in optical lithography using the extended Nijboer-Zernike theory

Dirksen, P. (author), Braat, J. (author), Janssen, A.J.E.M. (author)

journal article 2006

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High-density optical data storage

Van De Nes, A.S. (author), Braat, J.J.M. (author), Pereira, S.F. (author)

journal article 2006

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Optimizing Fourier filtering for digital holographic particle image velocimetry

Ooms, T. (author), Koek, W. (author), Braat, J. (author), Westerweel, J. (author)

journal article 2006

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Extended Nijboer–Zernike approach to aberration and birefringence retrieval in a high-numerical-aperture optical system

Braat, J.J.M. (author), Dirksen, P. (author), Janssen, A.J.E.M. (author), Van Haver, S. (author), Van de Nes, A.S. (author)

The judgment of the imaging quality of an optical system can be carried out by examining its through-focus intensity distribution. It has been shown in a previous paper that a scalar-wave analysis of the imaging process according to the extended Nijboer–Zernike theory allows the retrieval of the complex pupil function of the imaging system,...

journal article 2005

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Finding new local minima by switching merit functions in optical system optimization

Serebriakov, A. (author), Bocoirt, F. (author), Braat, J. (author)

journal article 2005

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Correcting movement errors in frequency-sweeping interferometry

Swinkels, B.L. (author), Bhattacharya, N. (author), Braat, J.J.M. (author)

Absolute distance measurements can be performed with an interferometric method that uses only a single tunable laser. This method has one major drawback, because a small target movement of the order of one wavelength during a measurement will be interpreted as a movement of one synthetic wavelength. This effect is usually mitigated by adding a...

journal article 2005

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Influence of virtual images on the signal-to-noise ratio in digital in-line particle holography

Koek, W.D. (author), Bhattacharya, N. (author), Braat, J.J.M. (author), Ooms, T.A. (author), Westerweel, J. (author)

A theoretical analysis describing the dependence of the signal-tonoise ratio (SNR) on the number of pixels and the number of particles is presented for in-line digital particle holography. The validity of the theory is verified by means of numerical simulation. Based on the theory we present a practical performance benchmark for digital...

journal article 2005

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Enhanced imaging in Extreme UV lithography by optimising the Molybdenum/Silicon thickness ratio in 2-D phase shifting mask design

Braat, J.J.M. (author), Nugrowati, A.M. (author), Van de Nes, A.S. (author), Pereira, S.F. (author)

Poster presentation Optics Research Group TU Delft

journal article 2005

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Networks of local minima for EUV mirror systems

Marinescu, O.E. (author), Bociort, F. (author), Braat, J.J.M. (author)

Poster presentation Optics Research Group TU Delft in cooperation with ASM Lithograpy and TNO

journal article 2005

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Generation of optical systems for lithography via saddle points

Braat, J.J.M. (author), Marinescu, O.E. (author), Bociort, F. (author)

Poster presentation Optics Research Group TU Delft in cooperation with ASM Lithograpy and TNO

journal article 2005

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Michelson wide-field stellar interferometry: Principles and experimental verification

Montilla, I. (author), Pereira, S.F. (author), Braat, J.J.M. (author)

A new interferometric technique for Michelson wide-field interferometry is presented that consists of a Michelson pupil-plane combination scheme in which a wide field of view can be achieved in one shot. This technique uses a stair-shaped mirror in the intermediate image plane of each telescope in the array, allowing for simultaneous correction...

journal article 2005