M. Lapert
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View article: Upper-body free-breathing Magnetic Resonance Fingerprinting applied to the quantification of water T1 and fat fraction
Upper-body free-breathing Magnetic Resonance Fingerprinting applied to the quantification of water T1 and fat fraction Open
Over the past decade, Magnetic Resonance Fingerprinting (MRF) has emerged as an efficient paradigm for the rapid and simultaneous quantification of multiple MRI parameters, including fat fraction (FF), water T1 (T1H2O), water T2 (T2H2O), a…
View article: Quantitative muscle water <scp>T<sub>2</sub></scp> mapping using <scp>RF</scp> phase‐modulated <scp>3D</scp> gradient echo imaging
Quantitative muscle water <span>T<sub>2</sub></span> mapping using <span>RF</span> phase‐modulated <span>3D</span> gradient echo imaging Open
Purpose To propose a motion robust 3D sequence for water T 2 () estimation in skeletal muscle tissues. Methods A estimation method is proposed, using 10 image volumes acquired with a partially spoiled gradient echo (pSPGR) sequence, varyin…
View article: Upper-body free-breathing Magnetic Resonance Fingerprinting applied to the quantification of water T1 and fat fraction
Upper-body free-breathing Magnetic Resonance Fingerprinting applied to the quantification of water T1 and fat fraction Open
Over the past decade, Magnetic Resonance Fingerprinting (MRF) has emerged as an efficient paradigm for the rapid and simultaneous quantification of multiple MRI parameters, including fat fraction (FF), water T1 ($T1_{H2O}$), water T2 ($T2_…
View article: Global displacement induced by rigid motion simulation during MRI acquisition
Global displacement induced by rigid motion simulation during MRI acquisition Open
Purpose: Simulation of motion in the frequency domain during the MRI acquisition process is an important tool to study the effect of object motion. It is natural in this context to rely on a voxel-to-voxel difference metric between the ori…
View article: Optimal control theory for applications in magnetic resonance imaging
Optimal control theory for applications in magnetic resonance imaging Open
We apply innovative mathematical tools coming from optimal control theory to improve theoretical and experimental techniques in Magnetic Resonance Imaging (MRI). This approach allows us to explore and to experimentally reach the physical l…
View article: Discrete-valued-pulse optimal control algorithms: Application to spin systems
Discrete-valued-pulse optimal control algorithms: Application to spin systems Open
This article is aimed at extending the framework of optimal control\ntechniques to the situation where the control field values are restricted to a\nfinite set. We propose a generalization of the standard GRAPE algorithm suited\nto this co…
View article: Optimal control of the signal-to-noise ratio per unit time of a spin 1/2 particle: The crusher gradient and the radiation damping cases
Optimal control of the signal-to-noise ratio per unit time of a spin 1/2 particle: The crusher gradient and the radiation damping cases Open
We show to which extent the signal to noise ratio per unit time of a spin 1/2 particle can be maximized. We consider a cyclic repetition of experiments made of a measurement followed by a radio-frequency magnetic field excitation of the sy…