Publicaties
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2D and 3D High-spatial and High-temporal Resolution Ultrasound Imaging for Characterization of Tendon Mechanics An Image Registration Approach KU Leuven
Achilles tendinopathy affects competitive and recreational athletes as well as inactive people. The incidence of this pathology in the general population is 1.8%and over 80% of tendon ruptures occur during recreational sports. The etiology of tendinopathies is multifactorial, but tendon overuse is assumed to be one of the main pathological stimuli. Recently published studies have demonstrated the need for a better characterization of the tendon, ...
3D elemental mapping with nanometer scale depth resolution via electron optical sectioning Universiteit Antwerpen
Electron energy loss spectroscopy in the scanning transmission electron microscope has long been used to perform elemental mapping but has not previously exhibited depth sensitivity. The key to depth resolution with optical sectioning is the transfer of sufficiently high lateral spatial frequencies. By performing spectrum imaging with atomic resolution we achieve nanometer scale depth resolution, enabling us to optically section an oxide ...
A practical method to determine the effective resolution in incoherent experimental electron tomography Universiteit Antwerpen
It is not straightforward to determine resolution for a 3D reconstruction when performing an electron tomography experiment. Different contributions such as missing wedge and misalignment add up and often influence the final resolution in an anisotropic manner. The conventional resolution measures can not be used for all of the reconstruction techniques, especially for iterative techniques which are more commonly used for electron tomography in ...
3D tendon strain estimation on high-frequency 3D ultrasound images. A simulation and phantom study KU Leuven
© 2016 IEEE. Tendon strain is a topic of interest within the orthopaedics and sports medicine community. If accurately estimated, it can improve existing treatment and rehabilitation protocols and aid in detection of presymptomatic abnormalities. This paper presents a novel US-based strain estimation framework that integrates an affine image registration approach to quantify tendon strain with a high-resolution 3D US imaging system. Validation ...
3D site specific sample preparation and analysis of 3D devices (FinFETs) by atom probe tomography KU Leuven
With the transition from planar to three-dimensional device architectures such as Fin field-effect-transistors (FinFETs), new metrology approaches are required to meet the needs of semiconductor technology. It is important to characterize the 3D-dopant distributions precisely as their extent, positioning relative to gate edges and absolute concentration determine the device performance in great detail. At present the atom probe has shown its ...
Synergistic effects in 3D honeycomb-like hematite nanoflakes/branched polypyrrole nanoleaves heterostructures as high-performance negative electrodes for asymmetric supercapacitors KU Leuven
© 2016 Elsevier Ltd. Rational assembly of unique branched heterostructures is one of the facile techniques to improve the electrochemical figure of merit of materials. By taking advantages of hydrogen bubbles dynamic template, hydrothermal method and electrochemical polymerization, branched polypyrrole (PPy) nanoleaves decorated honeycomb-like hematite nanoflakes (core-branch Fe2O3@PPy) are fabricated. X-ray diffraction, X-ray photoelectron ...
3D Freehand Ultrasound Data Acquisition and Processing to Obtain Clinically-relevant Muscle and Tendon Parameters in Static and Dynamic Conditions in Children with Spastic Cerebral Palsy KU Leuven
Ultrasonography offers the opportunity to directly visualize in-vivo anatomical features. This can be exploited in numerous clinical applications. Ultrasonography is especially useful to provide information on the diagnosis and continuous evaluation of spastic cerebral palsy, since it allows an easy and fast data collection also during dynamic activity. However, most ultrasound (US) investigations are confined by the measurement range of the US ...
A backward-mode optical-resolution photoacoustic microscope for 3D imaging using a planar Fabry-Perot sensor KU Leuven
Optical-resolution photoacoustic microscopy (OR-PAM) combines high spatial resolution and strong absorption-based contrast in tissue, which has enabled structural and spectroscopic imaging of endogenous chromophores, primarily hemoglobin. Conventional piezoelectric ultrasound transducers are typically placed far away from the photoacoustic source due to their opacity, which reduces acoustic sensitivity. Optical ultrasound sensors are an ...
ToF-S-SIMS molecular 3D analysis of micro-objects as an alternative to ion beam erosion at large depth Universiteit Antwerpen
Molecular depth profiling is needed to develop high-tech materials optimised to the μm or even up to the nm scale. Recent progress in time-of-flight static secondary ion mass spectrometry (ToF-S-SIMS) offers perspectives to molecular depth profiling. However, at this moment, the methodology is not yet capable to deal with a range of materials science applications because of the limited depth range, the loss of intensity in the subsurface and the ...