Results 51 to 60 of about 3,288 (238)

Ultrashort echo time spectroscopic imaging (UTESI) of cortical bone [PDF]

Magnetic Resonance in Medicine, 2007
AbstractCortical bone in the mature skeleton has a short T2* and produces no detectable signal with conventional MR sequences. A two‐dimensional ultrashort echo time (UTE) sequence employing half radio frequency (RF) pulse excitations and radial ramp sampling reduces the effective TE to 8 μs and is capable of detecting signals from cortical bone.
Jiang, Du, Gavin, Hamilton, Atsushi, Takahashi, Mark, Bydder, Christine B, Chung   +4 more
openaire   +2 more sources

Task-Evoked Functional Activation and Coupling With CSF Flow Detected in the Human Brain With Ultrashort Echo Time fMRI at 7 T. [PDF]

NMR Biomed
Ultrashort and zero echo time (UTE and ZTE) MRI techniques generate functional contrast through inflow effects, making them suitable for studying cerebral blood flow and cerebrospinal fluid (CSF) dynamics. In a 7‐T study of 13 participants performing a visual task, we demonstrate that UTE produced robust, reproducible activations with group‐level ...
Ponticorvo S, Paasonen E, Filip P, Rothman DL, Valjakka JS, Gröhn O, Michaeli S, Mangia S.   +7 more
europepmc   +2 more sources

Quantifying temperature‐dependent T1 changes in cortical bone using ultrashort echo‐time MRI [PDF]

, 2015
PURPOSE: To demonstrate the feasibility of using ultrashort echo-time MRI to quantify T1 changes in cortical bone due to heating. METHODS: Variable flip-angle T1 mapping combined with 3D ultrashort echo-time imaging was used to measure T1 in cortical ...
Scott, Serena J, Jones, Peter D, Diederich, Chris J, Krug, Roland, Larson, Peder EZ, Salgaonkar, Vasant A, Ozhinsky, Eugene, Han, Misung, Rieke, Viola   +8 more
core   +1 more source

Ultrashort Echo Time, MRI porosity index, and suppression ratio correlate with the cortical bone microstructural and mechanical properties [PDF]

, 2023
The cortical bone porous microstructure can be evaluated using ultrashort echo time (UTE) MRI. UTE-MRI-based evaluation of bone has been underutilized partly due to the high cost and time demands of MRI in general.
Jang, Hyungseok, Alenezi, Salem, Athertya, Jiyo, Moazamian, Dina, Dorthe, Erik, Woods, Gina, Chung, Christine, Dlima, Darryl, Ma, Yajun, Chang, Eric, Jerban, Saeed, Du, Jiang   +11 more
core   +1 more source

MR Imaging of the Pelvic Bones: The Current and Cutting-Edge Techniques

Journal of the Belgian Society of Radiology, 2022
This review presents an overview of the spectrum of the current and cutting-edge MRI techniques for pelvic bone imaging in clinical practice. The current MRI sequences and their advantages, disadvantages and usefullness in the imaging of this complex ...
Lieve Morbée, Elke Vereecke, Frederiek Laloo, Min Chen, Nele Herregods, Lennart Jans   +5 more
doaj   +1 more source

Ultra-short echo time cardiovascular magnetic resonance of atherosclerotic carotid plaque

Journal of Cardiovascular Magnetic Resonance, 2010
Background Multi-contrast weighted cardiovascular magnetic resonance (CMR) allows detailed plaque characterisation and assessment of plaque vulnerability.
Nielles-Vallespin Sonia, Keenan Niall G, Chan Cheuk F, Gatehouse Peter, Sheppard Mary N, Boyle Joseph J, Pennell Dudley J, Firmin David N   +7 more
doaj   +1 more source

Design of Differential Single-Block and Multi-Block Presaturated Ultrashort Echo Time Pulse Sequences for Fast and Flexible Short-T₂ Imaging. [PDF]

Magn Reson Med
ABSTRACT Purpose Ultrashort echo time (UTE) techniques are essential for the magnetic resonance imaging of short‐T2 signals. Current UTE techniques are time‐consuming and often require the acquisition of an inflexible volume. In this work, we implement new UTE sequences—differential single‐block presaturated UTE (δSB‐UTE) and differential multi‐block ...
Reich JA, Taylor SL, Harkins KD, Crescenzi RL, MacMillan EL, Feldman RE.   +5 more
europepmc   +2 more sources

Acceleration of Phase-Modulated Ultrashort Echo Time Sequence for Fast T₂ and Adiabatic T_1ρ Mapping of the Knee Joints. [PDF]

Magn Reson Med
ABSTRACT Purpose To develop and validate an accelerated phase‐modulated ultrashort echo time (PM‐UTE) sequence for volumetric T2 and adiabatic T1ρ (AdiabT1ρ) mapping of both short‐ and long‐T2 tissues in the knee joint. Methods The proposed method estimates and removes the T1‐dependent component from a single reference acquisition, eliminating repeated
Athertya JS, Moazamian D, Shojaeiadib N, Wang J, Shen X, Jerban S, Du J, Ma Y.   +7 more
europepmc   +2 more sources

Accurate T-1 Mapping for Oxygen-Enhanced MRI in the Mouse Lung Using a Segmented Inversion-Recovery Ultrashort Echo-Time Sequence [PDF]

, 2014
PurposeA segmented inversion-recovery module combined with the 2D ultrashort echo time radial technique is proposed that allows accurate pixel level T-1 mapping of mouse lung in vivo.
Zurek, M,, M. Zurek, Johansson, E,, Zurek, M., Johansson, E, Alamidi, Daniel, Johansson, E., Olsson, Lars E,, Hockings, Paul,, Risse, F, P. D. Hockings, Olsson, Lars E, F. Risse, Zurek, M, Alamidi, Daniel,, Hockings, Paul, Hockings, P. D., E. Johansson, L. E. Olsson, Risse, F,, Lund University., Risse, F., Alamidi, D., D. Alamidi   +23 more
core   +1 more source

Short T2 contrast with three-dimensional ultrashort echo time imaging [PDF]

Magnetic Resonance Imaging, 2011
There is increasing interest in imaging short T2 species which show little or no signal with conventional magnetic resonance (MR) pulse sequences. In this paper, we describe the use of three-dimensional ultrashort echo time (3D UTE) sequences with TEs down to 8 μs for imaging of these species.
Jiang, Du, Mark, Bydder, Atsushi M, Takahashi, Michael, Carl, Christine B, Chung, Graeme M, Bydder   +5 more
openaire   +2 more sources