Results 31 to 40 of about 6,769 (235)

Ultrashort echo time MRI biomarkers of asthma

Journal of Magnetic Resonance Imaging, 2016
PurposeTo develop and assess ultrashort echo‐time (UTE) magnetic resonance imaging (MRI) biomarkers of lung function in asthma patients.Materials and MethodsThirty participants including 13 healthy volunteers and 17 asthmatics provided written informed consent to UTE and pulmonary function tests in addition to hyperpolarized‐noble‐gas 3T MRI and ...
Sheikh, Khadija, Guo, Fumin, Capaldi, Dante P I, Ouriadov, Alexei, Eddy, Rachel L, Svenningsen, Sarah, Parraga, Grace   +6 more
openaire   +4 more sources

Quantitative Ultrashort Echo Time (UTE) Magnetic Resonance Imaging of Bone: An Update

Frontiers in Endocrinology, 2020
Bone possesses a highly complex hierarchical structure comprised of mineral (~45% by volume), organic matrix (~35%) and water (~20%). Water exists in bone in two forms: as bound water (BW), which is bound to bone mineral and organic matrix, or as pore ...
Ya-Jun Ma, Saeed Jerban, Hyungseok Jang, Douglas Chang, Eric Y. Chang, Eric Y. Chang, Jiang Du   +6 more
doaj   +1 more source

Outlook on zero/ultrashort echo time techniques in functional MRI. [PDF]

Magn Reson Med
AbstractSince its introduction more than 30 years ago, the blood oxygenation level dependent (BOLD) contrast remains the most widely used method for functional MRI (fMRI) in humans and animal models. The BOLD contrast is typically acquired with echo planar imaging (EPI) to obtain sensitization of the signal during the echo time (TE) to dynamic changes ...
Mangia S, Michaeli S, Gröhn O.
europepmc   +3 more sources

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

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

Coherent responses of resonance atom layer to short optical pulse excitation [PDF]

, 2006
Coherent responses of resonance atom layer to short optical pulse excitation are numerically considered. The inhomogeneous broadening of one-photon transition, the local field effect, and the substrate dispersion are involved into analysis. For a certain
A. I. Maimistov, A. M. Basharov, A. M. Basharov, E. A. Manykin, E. Vanagas, E. Vanagas, E. Vanagas, H. A. Lorentz, H. E. Ponath, L. Allen, L. C. Andreani, S. M. Zakharov, S. M. Zakharov, S. O. Elyutin, Sergei O. Elyutin, V. A. Goryachev, V. M. Agranovich, V. M. Agranovich, V. M. Agranovich   +18 more
core   +2 more sources

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

T2-based temperature monitoring in bone marrow for MR-guided focused ultrasound. [PDF]

, 2016
BackgroundCurrent clinical protocols for MR-guided focused ultrasound (MRgFUS) treatment of osseous lesions, including painful bone metastases and osteoid osteomas, rely on measurement of the temperature change in adjacent muscle to estimate the ...
Bucknor, Matthew, Han, Misung, Krug, Roland, Ozhinsky, Eugene, Rieke, Viola   +4 more
core   +1 more source

MR‐based PET attenuation correction using a combined ultrashort echo time/multi‐echo Dixon acquisition [PDF]

Medical Physics, 2020
PurposeTo develop a magnetic resonance (MR)‐based method for estimation of continuous linear attenuation coefficients (LACs) in positron emission tomography (PET) using a physical compartmental model and ultrashort echo time (UTE)/multi‐echo Dixon (mUTE) acquisitions.MethodsWe propose a three‐dimensional (3D) mUTE sequence to acquire signals from water,
Han, Paul Kyu, Horng, Debra E., Gong, Kuang, Petibon, Yoann, Kim, Kyungsang, Li, Quanzheng, Johnson, Keith A., Fakhri, Georges El, Ouyang, Jinsong, Ma, Chao   +9 more
openaire   +3 more sources

Outracing Lung Signal Decay – Potential of Ultrashort Echo Time MRI [PDF]

RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren, 2018
Background Magnetic resonance imaging (MRI) of the pulmonary parenchyma is generally hampered by multiple challenges related to patient respiratory- and circulation-related motion, low proton density and extremely fast signal decay due to the structure of the lungs evolved for gas exchange.
Mark Oliver, Wielpütz, Simon M F, Triphan, Yoshiharu, Ohno, Bertram J, Jobst, Hans-Ulrich, Kauczor   +4 more
openaire   +2 more sources