Search Results - "Drobnjak, Ivana"

Physical and digital phantoms for validating tractography and assessing artifacts by Drobnjak, Ivana, Neher, Peter, Poupon, Cyril, Sarwar, Tabinda

“…Fiber tractography is widely used to non-invasively map white-matter bundles in vivo using diffusion-weighted magnetic resonance imaging (dMRI). As it is the…”
Get full text

PGSE, OGSE, and sensitivity to axon diameter in diffusion MRI: Insight from a simulation study by Drobnjak, Ivana, Zhang, Hui, Ianuş, Andrada, Kaden, Enrico, Alexander, Daniel C

“…Purpose To identify optimal pulsed gradient spin‐echo (PGSE) and oscillating gradient spin‐echo (OGSE) sequence settings for maximizing sensitivity to axon…”
Get full text

Quantitative assessment of the susceptibility artefact and its interaction with motion in diffusion MRI by Graham, Mark S, Drobnjak, Ivana, Jenkinson, Mark, Zhang, Hui

“…In this paper we evaluate the three main methods for correcting the susceptibility-induced artefact in diffusion-weighted magnetic-resonance (DW-MR) data, and…”
Get full text

Accurate estimation of microscopic diffusion anisotropy and its time dependence in the mouse brain by Ianuş, Andrada, Jespersen, Sune N., Serradas Duarte, Teresa, Alexander, Daniel C., Drobnjak, Ivana, Shemesh, Noam

“…Microscopic diffusion anisotropy (μA) has been recently gaining increasing attention for its ability to decouple the average compartment anisotropy from…”
Get full text

Conventions and nomenclature for double diffusion encoding NMR and MRI by Shemesh, Noam, Jespersen, Sune N., Alexander, Daniel C., Cohen, Yoram, Drobnjak, Ivana, Dyrby, Tim B., Finsterbusch, Jurgen, Koch, Martin A., Kuder, Tristan, Laun, Fredrik, Lawrenz, Marco, Lundell, Henrik, Mitra, Partha P., Nilsson, Markus, Özarslan, Evren, Topgaard, Daniel, Westin, Carl-Fredrik

“…Stejskal and Tanner's ingenious pulsed field gradient design from 1965 has made diffusion NMR and MRI the mainstay of most studies seeking to resolve…”
Get full text

Temporal Diffusion Ratio (TDR) for imaging restricted diffusion: Optimisation and pre-clinical demonstration by Warner, William, Palombo, Marco, Cruz, Renata, Callaghan, Ross, Shemesh, Noam, Jones, Derek K., Dell'Acqua, Flavio, Ianus, Andrada, Drobnjak, Ivana

“…•Temporal Diffusion Ratio (TDR) maps areas of restricted diffusion using two different gradient waveforms.•The two optimised gradient waveforms have: long…”
Get full text

Relevance of time‐dependence for clinically viable diffusion imaging of the spinal cord by Grussu, Francesco, Ianuş, Andrada, Tur, Carmen, Prados, Ferran, Schneider, Torben, Kaden, Enrico, Ourselin, Sébastien, Drobnjak, Ivana, Zhang, Hui, Alexander, Daniel C., Gandini Wheeler‐Kingshott, Claudia A. M.

“…Purpose Time‐dependence is a key feature of the diffusion‐weighted (DW) signal, knowledge of which informs biophysical modelling. Here, we study…”
Get full text

Machine learning based white matter models with permeability: An experimental study in cuprizone treated in-vivo mouse model of axonal demyelination by Hill, Ioana, Palombo, Marco, Santin, Mathieu, Branzoli, Francesca, Philippe, Anne-Charlotte, Wassermann, Demian, Aigrot, Marie-Stephane, Stankoff, Bruno, Baron-Van Evercooren, Anne, Felfli, Mehdi, Langui, Dominique, Zhang, Hui, Lehericy, Stephane, Petiet, Alexandra, Alexander, Daniel C., Ciccarelli, Olga, Drobnjak, Ivana

“…The intra-axonal water exchange time (τi), a parameter associated with axonal permeability, could be an important biomarker for understanding and treating…”
Get full text

Advances in functional and structural MR image analysis and implementation as FSL by Smith, Stephen M., Jenkinson, Mark, Woolrich, Mark W., Beckmann, Christian F., Behrens, Timothy E.J., Johansen-Berg, Heidi, Bannister, Peter R., De Luca, Marilena, Drobnjak, Ivana, Flitney, David E., Niazy, Rami K., Saunders, James, Vickers, John, Zhang, Yongyue, De Stefano, Nicola, Brady, J. Michael, Matthews, Paul M.

“…The techniques available for the interrogation and analysis of neuroimaging data have a large influence in determining the flexibility, sensitivity, and scope…”
Get full text

Gaussian phase distribution approximations for oscillating gradient spin echo diffusion MRI by Ianuş, Andrada, Siow, Bernard, Drobnjak, Ivana, Zhang, Hui, Alexander, Daniel C.

“…[Display omitted] ► Analytical expressions of the diffusion MRI signal for oscillating gradients. ► Results validated using Monte Carlo simulation and…”
Get full text

Development of a functional magnetic resonance imaging simulator for modeling realistic rigid-body motion artifacts by Drobnjak, Ivana, Gavaghan, David, Süli, Endre, Pitt-Francis, Joe, Jenkinson, Mark

“…Functional magnetic resonance imaging (FMRI) is a noninvasive method of imaging brain function in vivo. However, images produced in FMRI experiments are…”
Get full text

Measuring Patient Compliance With Remote Monitoring Following Discharge From Hospital After Major Surgery (DREAMPath): Protocol for a Prospective Observational Study by Khetrapal, Pramit, Stafford, Ronnie, Ó Scanaill, Pádraig, Kocadag, Huriye, Timinis, Constantinos, Chang, Angela H L, Hadjivasiliou, Adamos, Liu, Yansong, Gibbs, Olivia, Pickford, Eleanor, Walker, David, Baker, Hilary, Duncan, Jacqueline, Tan, Melanie, Williams, Norman, Catto, James, Drobnjak, Ivana, Kelly, John

“…The incidence of major surgery is on the rise globally, and more than 20% of patients are readmitted to hospital following discharge from hospital. During…”
Get full text

Quality Assessment of Ambulatory ECG Using Wavelet Entropy of the HRV Signal by Orphanidou, Christina, Drobnjak, Ivana

“…Data in recordings obtained from ambulatory patients using wearable sensors are often corrupted by motion artefact and are, in general, noisier than the data…”
Get full text

Realistic simulation of artefacts in diffusion MRI for validating post-processing correction techniques by Graham, Mark S., Drobnjak, Ivana, Zhang, Hui

“…In this paper we demonstrate a simulation framework that enables the direct and quantitative comparison of post-processing methods for diffusion weighted…”
Get full text

A supervised learning approach for diffusion MRI quality control with minimal training data by Graham, Mark S., Drobnjak, Ivana, Zhang, Hui

“…Quality control (QC) is a fundamental component of any study. Diffusion MRI has unique challenges that make manual QC particularly difficult, including a…”
Get full text

Resolution limit of cylinder diameter estimation by diffusion MRI: The impact of gradient waveform and orientation dispersion by Nilsson, Markus, Lasič, Samo, Drobnjak, Ivana, Topgaard, Daniel, Westin, Carl‐Fredrik

“…Diffusion MRI has been proposed as a non‐invasive technique for axonal diameter mapping. However, accurate estimation of small diameters requires strong…”
Get full text

Towards a comprehensive framework for movement and distortion correction of diffusion MR images: Within volume movement by Andersson, Jesper L.R., Graham, Mark S., Drobnjak, Ivana, Zhang, Hui, Filippini, Nicola, Bastiani, Matteo

“…Most motion correction methods work by aligning a set of volumes together, or to a volume that represents a reference location. These are based on an implicit…”
Get full text

Susceptibility-induced distortion that varies due to motion: Correction in diffusion MR without acquiring additional data by Andersson, Jesper L.R., Graham, Mark S., Drobnjak, Ivana, Zhang, Hui, Campbell, Jon

“…Because of their low bandwidth in the phase-encode (PE) direction, the susceptibility-induced off-resonance field causes distortions in echo planar imaging…”
Get full text

Double oscillating diffusion encoding and sensitivity to microscopic anisotropy by Ianuş, Andrada, Shemesh, Noam, Alexander, Daniel C., Drobnjak, Ivana

“…Purpose To introduce a novel diffusion pulse sequence, namely double oscillating diffusion encoding (DODE), and to investigate whether it adds sensitivity to…”
Get full text

Model-based estimation of microscopic anisotropy using diffusion MRI: a simulation study by Ianuş, Andrada, Drobnjak, Ivana, Alexander, Daniel C.

“…Non‐invasive estimation of cell size and shape is a key challenge in diffusion MRI. This article presents a model‐based approach that provides independent…”
Get full text