Publicaties
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Simulation of nonlinear optical resonator circuits Universiteit Gent
Recently, we proposed a node-based framework to model large circuits of nonlinear photonic components. This flexible tool can be used to simulate circuits that contain a variety of components both in time-domain and in frequency-domain. In this paper, we extend the node-definition of this framework such that that the linear coupling between access waveguides and resonance states in optical resonators can be more efficiently incorporated. We ...
Imaging techniques for tumour delineation and heterogeneity quantification of lung cancer: overview of current possibilities KU Leuven
Imaging techniques for the characterization and delineation of primary lung tumours and lymph nodes are a prerequisite for adequate radiotherapy. Numerous imaging modalities have been proposed for this purpose, but only computed tomography (CT) and FDG-PET have been implemented in clinical routine. Hypoxia PET, dynamic contrast-enhanced CT (DCE-CT), dual energy CT (DECT) and (functional) magnetic resonance imaging (MRI) hold promise for the ...
Orientational changes of supported chiral 2,2 '-dihydroxy-1,1 ' binaphthyl molecules KU Leuven
Well defined thin molecular films of 2,2'-dihydroxy-1,1'binaphthyl (binol) molecules at coverages between 5 × 10(15) molecules per cm(2) and 10(17) molecules per cm(2) on thin glass (BK7) substrates were investigated under ultra-high-vacuum (UHV) conditions. Second-Harmonic-Generation Optical-Rotatory-Dispersion measurements (SHG-ORD) were performed using a dedicated spectroscopic setup which allows for the determination of the rotation angle of ...
Estimating blur at the brain gray-white matter boundary for FCD detection in MRI Universiteit Gent
Focal cortical dysplasia (FCD) is a frequent cause of epilepsy and can be detected using brain magnetic resonance imaging (MRI). One important MRI feature of FCD lesions is the blurring of the gray-white matter boundary (GWB), previously modelled by the gradient strength. However, in the absence of additional FCD descriptors, current gradient-based methods may yield false positives. Moreover, they do not explicitly quantify the level of blur ...
The effect of external dynamic loads on the lifetime of rolling element bearings: SEM analysis of raceway surface wear KU Leuven
Accurate prediction of the lifetime of rolling element bearings is a crucial step towards a reliable design of many rotating machines. Recent research emphasises an important influence of external dynamic loads on the lifetime of bearings. The loads can result from structural resonances, gear meshing, etc. Lifetime calculations of bearings are based on the classical ISO 281 standard, neglecting their influence. Inaccurate estimations of the ...
Phenotip - a web-based instrument to help diagnosing fetal syndromes antenatally KU Leuven
Prenatal ultrasound can often reliably distinguish fetal anatomic anomalies, particularly in the hands of an experienced ultrasonographer. Given the large number of existing syndromes and the significant overlap in prenatal findings, antenatal differentiation for syndrome diagnosis is difficult. We constructed a hierarchic tree of 1140 sonographic markers and submarkers, organized per organ system. Subsequently, a database of prenatally ...
Stabilization of a Cobalt Cobalt Bond by Two Cyclic Alkyl Amino Carbenes KU Leuven
(Me2-cAAC:)2Co2 (2, where Me2-cAAC: = cyclic alkyl amino carbene, :C(CH2)(CMe2)2N-2,6-iPr2C6H3)) was synthesized via the reduction of precursor (Me2-cAAC:CoII(μ-Cl)Cl)2 (1) with KC8. 2 contains two cobalt atoms in the formal oxidation state zero. Magnetic measurement revealed that 2 has a singlet spin ground state S = 0. The cyclic voltammogram of 2 exhibits both one-electron oxidation and reduction, indicating the possible synthesis of stable ...
MR Imaging in Hypertrophic Cardiomyopathy: From Magnet to Bedside KU Leuven
Hypertrophic cardiomyopathy ( HCM hypertrophic cardiomyopathy ), the most common genetically transmitted cardiac disorder, has been the focus of extensive research over the past 50 years. HCM hypertrophic cardiomyopathy is a multifaceted disease with highly heterogeneous genetic background, phenotypic expression, clinical presentation, and long-term outcome. Though most patients have an indolent course with a life expectancy comparable to that ...
Gas leak rate study of MEMS thin film package in different environments KU Leuven
© 2014 IEEE. Hermeticity is an important reliability issue for MEMS thin film packages, but difficult to test due to their small volume. We have developed a novel method based on the thin film damping theory to measure the internal pressure and the leak rate of a MEMS thin-film package. The method uses the Focused Ion Beam (FIB) and Laser Doppler Vibrometer (LDV) to monitor the change of the package resonance frequency with pressure. In this ...