133 citations · 493 across the 30 of their papers we have counts for
14 papers · 1 filter
Universal pulses for homogeneous excitation using single channel coils
Ronald Mooiweer, Ian A. Clark, Eleanor A. Maguire +3
Purpose: Universal Pulses (UPs) are excitation pulses that reduce the flip angle inhomogeneity in high field MRI systems without subject-specific optimization, originally developed…
An 8 channel parallel transmit system with current sensor feedback for MRI-guided interventional applications
Felipe Godinez, Raphael Tomi-Tricot, Matthias Barthel +5
Background: Parallel transmit (pTx) has introduced many benefits to MRI with regard to decreased specific absorption rates and improved transmit field homogeneity, of particular im…
Impact of aperture, depth, and acoustic clutter on performance of Coherent Multi-Transducer Ultrasound imaging
Laura Peralta, Alessandro Ramalli, Michael Reinwald +2
Transducers with larger aperture size are desirable in ultrasound imaging to improve resolution and image quality. A coherent multi-transducer ultrasound imaging system (CoMTUS) en…
Efficiency analysis for quantitative MRI of T1 and T2 relaxometry methods
David Leitão, Rui Pedro A. G. Teixeira, Anthony Price +3
This study presents a comparison of quantitative MRI methods based on an efficiency metric that quantifies their intrinsic ability to extract information about tissue parameters. U…
Motion corrected MRI with DISORDER: Distributed and Incoherent Sample Orders for Reconstruction Deblurring using Encoding Redundancy
Lucilio Cordero-Grande, Giulio Ferrazzi, Rui Pedro A. G. Teixeira +3
Purpose: To enable rigid-body motion tolerant parallel volumetric magnetic resonance imaging by retrospective head motion correction on a variety of spatio-temporal scales and imag…
Perfusion and apparent oxygenation in the human placenta (PERFOX)
Jana Hutter, Anita A. Harteveld, Laurence H. Jackson +9
Purpose: To study placental function - both perfusion and an oxygenation surrogate (T2*)-simultaneously and quantitatively in-vivo. Methods: 15 pregnant women were scanned on a 3T…
Deformable Slice-to-Volume Registration for Motion Correction in Fetal Body MRI
Alena Uus, Tong Zhang, Laurence H. Jackson +4
In in-utero MRI, motion correction for fetal body and placenta poses a particular challenge due to the presence of local non-rigid transformations of organs caused by bending and s…
In utero diffusion MRI: challenges, advances, and applications
Daan Christiaens, Paddy J. Slator, Lucilio Cordero-Grande +6
In utero diffusion MRI provides unique opportunities to non-invasively study the microstructure of tissue during fetal development. A wide range of developmental processes, such as…
Scattered slice SHARD reconstruction for motion correction in multi-shell diffusion MRI
Daan Christiaens, Lucilio Cordero-Grande, Maximilian Pietsch +8
Diffusion MRI offers a unique probe into neural microstructure and connectivity in the developing brain. However, analysis of neonatal brain imaging data is complicated by inevitab…
Coherent Multi-Transducer Ultrasound Imaging
Laura Peralta, Alberto Gomez, Ying Luan +3
An extended aperture has the potential to greatly improve ultrasound imaging performance. This work extends the effective aperture size by coherently compounding the received radio…
Fetal whole-heart 4D imaging using motion-corrected multi-planar real-time MRI
Joshua FP van Amerom, David FA Lloyd, Maria Deprez +7
Purpose: To develop a MRI acquisition and reconstruction framework for volumetric cine visualisation of the fetal heart and great vessels in the presence of maternal and fetal moti…
Combined Diffusion-Relaxometry MRI to Identify Dysfunction in the Human Placenta
Paddy J. Slator, Jana Hutter, Marco Palombo +7
Purpose: A combined diffusion-relaxometry MR acquisition and analysis pipeline for in-vivo human placenta, which allows for exploration of coupling between T2* and apparent diffusi…
Learning compact q-space representations for multi-shell diffusion-weighted MRI
Daan Christiaens, Lucilio Cordero-Grande, Jana Hutter +4
Diffusion-weighted MRI measures the direction and scale of the local diffusion process in every voxel through its spectrum in q-space, typically acquired in one or more shells. Rec…
Extended Phase Graph formalism for systems with Magnetization Transfer and Chemical Exchange
Shaihan J. Malik, Rui P. A. G. Teixeira, Joseph V. Hajnal
An Extended Phase Graph framework for modelling systems with exchange or magnetization transfer (MT) is proposed. The framework, referred to as EPG-X, models coupled two-compartmen…