Search Results - "Levesque, Ives"

Editorial for “pH Mapping of Gliomas Using Quantitative Chemical Exchange Saturation Transfer MRI: Quasi‐Steady‐State, Spillover‐, and MT‐Corrected Omega Plot Analysis” by Levesque, Ives R.

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Accelerating parameter mapping with a locally low rank constraint by Zhang, Tao, Pauly, John M., Levesque, Ives R.

“…Purpose To accelerate MR parameter mapping using a locally low rank (LLR) constraint, and the combination of parallel imaging and the LLR constraint. Theory…”
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MRI-based myelin water imaging: A technical review by Alonso-Ortiz, Eva, Levesque, Ives R., Pike, G. Bruce

“…Multiexponential T2 relaxation time measurement in the central nervous system shows a component that originates from water trapped between the lipid bilayers…”
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A simulation study of cell size and volume fraction mapping for tissue with two underlying cell populations using diffusion‐weighted MRI by Xing, Shu, Levesque, Ives R.

“…Purpose To propose a method for voxel‐wise estimation of cell radii and volume fractions of two cell populations when they coexist in the same MR voxel using…”
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Visualization of intra-thalamic nuclei with optimized white-matter-nulled MPRAGE at 7 T by TOURDIAS, Thomas, SARANATHAN, Manojkumar, LEVESQUE, Ives R, SU, Jason, RUTT, Brian K

“…Novel MR image acquisition strategies have been investigated to elicit contrast within the thalamus, but direct visualization of individual thalamic nuclei…”
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On the accuracy of T1 mapping: Searching for common ground by Stikov, Nikola, Boudreau, Mathieu, Levesque, Ives R., Tardif, Christine L., Barral, Joëlle K., Pike, G. Bruce

“…Purpose There are many T1 mapping methods available, each of them validated in phantoms and reporting excellent agreement with literature. However, values in…”
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Multi‐gradient‐echo myelin water fraction imaging: Comparison to the multi‐echo‐spin‐echo technique by Alonso‐Ortiz, Eva, Levesque, Ives R., Pike, G. Bruce

“…Purpose Myelin water fraction (MWF) mapping based on multi‐gradient recalled‐echo (MGRE) imaging has been proposed as an alternative to the conventional…”
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Pharmacokinetic modeling of dynamic contrast‐enhanced MRI using a reference region and input function tail by Ahmed, Zaki, Levesque, Ives R.

“…Purpose Quantitative analysis of dynamic contrast‐enhanced MRI (DCE‐MRI) requires an arterial input function (AIF) which is difficult to measure. We propose…”
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Visualization of intra-thalamic nuclei with optimized white-matter-nulled MPRAGE at 7T by Tourdias, Thomas, Saranathan, Manojkumar, Levesque, Ives R., Su, Jason, Rutt, Brian K.

“…Novel MR image acquisition strategies have been investigated to elicit contrast within the thalamus, but direct visualization of individual thalamic nuclei…”
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Phase processing for quantitative susceptibility mapping of regions with large susceptibility and lack of signal by Fortier, Véronique, Levesque, Ives R.

“…Purpose Phase processing impacts the accuracy of quantitative susceptibility mapping (QSM). Techniques for phase unwrapping and background removal have been…”
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Impact of magnetic susceptibility anisotropy at 3 T and 7 T on T2-based myelin water fraction imaging by Alonso-Ortiz, Eva, Levesque, Ives R., Pike, G. Bruce

“…Myelin Water Fraction (MWF) mapping can be achieved by fitting multi-gradient recalled echo (MGRE) magnitude images with a three-component model or a…”
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MR-oximetry with fat DESPOT by Fortier, Véronique, Levesque, Ives R.

“…The R1 relaxation rate of fat is a promising marker of tissue oxygenation. Existing techniques to map fat R1 in MR-oximetry offer limited spatial coverage,…”
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Development and Validation of Multiparametric MRI–based Radiomics Models for Preoperative Risk Stratification of Endometrial Cancer by Lefebvre, Thierry L., Ueno, Yoshiko, Dohan, Anthony, Chatterjee, Avishek, Vallières, Martin, Winter-Reinhold, Eric, Saif, Sameh, Levesque, Ives R., Zeng, Xing Ziggy, Forghani, Reza, Seuntjens, Jan, Soyer, Philippe, Savadjiev, Peter, Reinhold, Caroline

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R2 Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T by Fortier, Véronique, Mohamed, Ahmed, McNabb, Evan, Dana, Jérémy, Zakarian, Rita, Levesque, Ives R., Reinhold, Caroline

“…Rationale and Objectives: Fat quantification accuracy using a commercial single-voxel high speed T2-corrected multi-echo (HISTO) technique and its robustness…”
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Biexponential longitudinal relaxation in white matter: Characterization and impact on T1 mapping with IR-FSE and MP2RAGE by Rioux, James A., Levesque, Ives R., Rutt, Brian K.

“…Purpose Magnetization transfer in white matter (WM) causes biexponential relaxation, but most quantitative T1 measurements fit data assuming monoexponential…”
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An extended reference region model for DCE‐MRI that accounts for plasma volume by Ahmed, Zaki, Levesque, Ives R.

“…The reference region model (RRM) for dynamic contrast‐enhanced magnetic resonance imaging (DCE‐MRI) provides pharmacokinetic parameters without requiring the…”
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Longitudinal relaxation in fat‐water mixtures and its dependence on fat content at 3 T by Fortier, Véronique, Levesque, Ives R.

“…Longitudinal (T1) relaxation of triglyceride molecules and water is of interest for fat‐water separation and fat quantification. A better understanding of T1…”
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Increased robustness in reference region model analysis of DCE MRI using two‐step constrained approaches by Ahmed, Zaki, Levesque, Ives R.

“…Purpose Reference region models (RRMs) can quantify tumor perfusion in dynamic contrast‐enhanced MRI without an arterial input function. Inspection of the RRM…”
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Field inhomogeneity correction for gradient echo myelin water fraction imaging by Alonso‐Ortiz, Eva, Levesque, Ives R., Paquin, Raphaël, Pike, G. Bruce

“…Purpose Recently, the multi‐echo gradient echo (MGRE) sequence has been proposed for multicomponent T2* (MC T2*) based myelin water fraction (MWF) mapping…”
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R 2 Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T by Fortier, Véronique, Mohamed, Ahmed, McNabb, Evan, Dana, Jérémy, Zakarian, Rita, Levesque, Ives R, Reinhold, Caroline

“…Fat quantification accuracy using a commercial single-voxel high speed T -corrected multi-echo (HISTO) technique and its robustness to R * variations at 3.0 T,…”
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