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Tongel, Alexander Van (author), Wilde, Lieven De (author), Shimamura, Yasunori (author), Sijbers, Jan (author), Huysmans, T. (author)
Current classifications of midshaft clavicle fractures are based on radiography. The aim of the study was to evaluate the fracture pattern of clavicle fractures using 3-dimensional computed tomography (3D CT). A retrospective analysis was performed on CT scans of 65 acute clavicle fractures. Using quantitative 3D CT reconstruction techniques,...
journal article 2021
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Sabidussi, E. R. (author), Klein, S. (author), Caan, M. W.A. (author), Bazrafkan, S. (author), den Dekker, A. J. (author), Sijbers, J. (author), Niessen, W.J. (author), Poot, D.H.J. (author)
In this paper, we propose the use of Recurrent Inference Machines (RIMs) to perform T<sub>1</sub> and T<sub>2</sub> mapping. The RIM is a neural network framework that learns an iterative inference process based on the signal model, similar to conventional statistical methods for quantitative MRI (QMRI), such as the Maximum Likelihood...
journal article 2021
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Van Houtte, Jeroen (author), Vandenberghe, Filip (author), Zheng, Guoyan (author), Huysmans, T. (author), Sijbers, Jan (author)
Most digital models of the equine distal limb that are available in the community are static and/or subject specific; hence, they have limited applications in veterinary research. In this paper, we present an articulatable model of the entire equine distal limb based on statistical shape modeling. The model describes the inter-subject...
journal article 2021
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Booth, Brian G. (author), Hoefnagels, Eva (author), Huysmans, T. (author), Sijbers, Jan (author), Keijsers, Noël L.W. (author)
Quantitative analyses of plantar pressure images typically occur at the group level and under the assumption that individuals within each group display homogeneous pressure patterns. When this assumption does not hold, a personalized analysis technique is required. Yet, existing personalized plantar pressure analysis techniques work at the image...
journal article 2020
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Stanković, Kristina (author), Huysmans, T. (author), Danckaers, Femke (author), Sijbers, Jan (author), Booth, Brian G. (author)
The high prevalence of foot pain, and its relation to foot shape, indicates the need for an expert system to identify foot shape abnormalities. Yet, to date, no such expert system exists that examines the full 3D foot shape and produces an intuitive explanation of why a foot is abnormal. In this work, we present the first such expert system that...
journal article 2020
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Keustermans, William (author), Huysmans, T. (author), Schmelzer, Bert (author), Sijbers, Jan (author), Dirckx, J.J. (author)
In this paper, we investigate the heating function of the nasal cavity qualitatively, using a high-quality, large-scale statistical shape model. This model consists of a symmetrical and an asymmetrical part and provides a new and unique way of examining changes in nasal heating function resulting from natural variations in nasal shape (as...
journal article 2020
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Bladt, Piet (author), den Dekker, A.J. (author), Clement, Patricia (author), Achten, Eric (author), Sijbers, Jan (author)
Multi-post-labeling-delay pseudo-continuous arterial spin labeling (multi-PLD PCASL) allows for absolute quantification of the cerebral blood flow (CBF) as well as the arterial transit time (ATT). Estimating these perfusion parameters from multi-PLD PCASL data is a non-linear inverse problem, which is commonly tackled by fitting the single...
journal article 2019
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Bosmans, Bart (author), Huysmans, T. (author), Lopes, Patricia (author), Verhoelst, Eva (author), Dezutter, Tim (author), de Jaegere, Peter (author), Sijbers, Jan (author), Vander Sloten, Jos (author), Bosmans, Johan (author)
During a transcatheter aortic valve implantation, an axisymmetric implant is placed in an irregularly shaped aortic root. Implanting an incorrect size can cause complications such as leakage of blood alongside or through the implant. The aim of this study was to construct a method that determines the optimal size of the implant based on the...
journal article 2019
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Booth, Brian G. (author), Sijbers, Jan (author), Huysmans, T. (author)
journal article 2019
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Danckaers, Femke (author), Huysmans, T. (author), Hallemans, Ann (author), De Bruyne, Guido (author), Truijen, Steven (author), Sijbers, Jan (author)
For product developers that design near-body products, virtual mannequins that represent realistic body shapes, are valuable tools. With statistical shape modelling, the variability of such body shapes can be described. Shape variation captured by statistical shape models (SSMs) is often polluted by posture variations, leading to less compact...
journal article 2019
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Booth, Brian G. (author), Keijsers, Noël L.W. (author), Sijbers, Jan (author), Huysmans, T. (author)
Data reduction techniques are commonly applied to dynamic plantar pressure measurements, often prior to the measurement's analysis. In performing these data reductions, information is discarded from the measurement before it can be evaluated, leading to unkonwn consequences. In this study, we aim to provide the first assessment of what impact...
journal article 2019
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Booth, Brian G. (author), Keijsers, Noël L.W. (author), Sijbers, Jan (author), Huysmans, T. (author)
<br/>Background<br/><br/>Pedobarography produces large sets of plantar pressure samples that are routinely subsampled (e.g. using regions of interest) or aggregated (e.g. center of pressure trajectories, peak pressure images) in order to simplify statistical analysis and provide intuitive clinical measures.<br/><br/>Research Question<br/><br/>We...
journal article 2018
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Collier, Quinten (author), Veraart, Jelle (author), Jeurissen, Ben (author), Vanhevel, Floris (author), Pullens, Pim (author), Parizel, Paul M. (author), den Dekker, A.J. (author), Sijbers, JJM (author)
Purpose: Diffusion kurtosis imaging (DKI) is an advanced magnetic resonance imaging modality that is known to be sensitive to changes in the underlying microstructure of the brain. Image voxels in diffusion weighted images, however, are typically relatively large making them susceptible to partial volume effects, especially when part of the...
journal article 2018
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Elberfeld, Tim (author), De Beenhouwer, Jan (author), den Dekker, A.J. (author), Heinzl, Christoph (author), Sijbers, Jan (author)
We present a new approach to estimate geometry parameters of glass fibers in glass fiber-reinforced polymers from simulated X-ray micro-computed tomography scans. Traditionally, these parameters are estimated using a multi-step procedure including image reconstruction, pre-processing, segmentation and analysis of features of interest. Each...
journal article 2018
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Keustermans, William (author), Huysmans, T. (author), Danckaers, Femke (author), Zarowski, Andrzej (author), Schmelzer, Bert (author), Sijbers, Jan (author), Dirckx, J.J. (author)
The human nose is a complex organ that shows large morphological variations and has many important functions. However, the relation between shape and function is not yet fully understood. In this work, we present a high quality statistical shape model of the human nose based on clinical CT data of 46 patients. A technique based on cylindrical...
journal article 2018
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Sun, Sihao (author), Sijbers, Leon (author), Wang, Xuerui (author), de Visser, C.C. (author)
In order to achieve high-speed flight of a damaged quadrotor with complete loss of a single rotor, a multiloop hybrid nonlinear controller is designed. By fully making use of sensor measurements, the model dependence of this control method is reduced, which is conducive to handling disturbance from the unknown aerodynamic effects. This...
journal article 2018
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Stanković, Kristina (author), Booth, Brian G. (author), Danckaers, Femke (author), Burg, Fien (author), Vermaelen, Philippe (author), Duerinck, Saartje (author), Sijbers, Jan (author), Huysmans, T. (author)
Background: Foot morphology has received increasing attention from both biomechanics researches and footwear manufacturers. Usually, the morphology of the foot is quantified by 2D footprints. However, footprint quantification ignores the foot's vertical dimension and hence, does not allow accurate quantification of complex 3D foot shape....
journal article 2018
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Ramos-Llorden, Gabriel (author), den Dekker, A.J. (author), Sijbers, Jan (author)
An important factor influencing the quality of magnetic resonance (MR) images is the reconstruction method that is employed, and specifically, the type of prior knowledge that is exploited during reconstruction. In this work, we introduce a new type of prior knowledge, partial discreteness (PD), where a small number of regions in the image...
journal article 2017
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Ramos-Llorden, Gabriel (author), den Dekker, A.J. (author), Van Steenkiste, Gwendolyn Van (author), Jeurissen, Ben (author), Vanhevel, Floris (author), Audekerke, Johan Van (author), Verhoye, Marleen (author), Sijbers, Jan (author)
In quantitative MR T1 mapping, the spin-lattice relaxation time T1 of tissues is estimated from a series of T1-weighted images. As the T1 estimation is a voxel-wise estimation procedure, correct spatial alignment of the T1-weighted images is crucial. Conventionally, the T1-weighted images are first registered based on a general-purpose...
journal article 2017
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Sudeep, P. V. (author), Palanisamy, P. (author), Kesavadas, Chandrasekharan (author), Sijbers, JJM (author), den Dekker, A.J. (author), Rajan, Jeny (author)
A phase map can be obtained from the real and imaginary components of a complex valued magnetic resonance (MR) image. Many applications, such as MR phase velocity mapping and susceptibility mapping, make use of the information contained in the MR phase maps. Unfortunately, noise in the complex MR signal affects the measurement of parameters...
journal article 2017
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