Results 41 to 50 of about 14,640 (199)

Assessing temperature dependence of T1 in cortical bone using ultrashort echo-time MRI [PDF]

J Ther Ultrasound, 2015
Han M, Scott S, Ozhinsky E, Salgaonkar V, Jones P, Larson P, Diederich C, Krug R, Rieke V.   +8 more
europepmc   +2 more sources

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   +4 more sources

Clinical evaluation of white matter lesions on 3D inversion recovery ultrashort echo time MRI in multiple sclerosis

Quantitative Imaging in Medicine and Surgery, 2023
Background We clinically evaluated the quality of white matter lesions (WML) of the cerebrum on 3D inversion recovery ultrashort echo time (IR-UTE) magnetic resonance imaging (MRI) in multiple sclerosis (MS) patients.
S. Sedaghat, H. Jang, Yajun Ma, A. Afsahi, B. Reichardt, J. Corey-Bloom, J. Du   +6 more
semanticscholar   +1 more source

An Update in Qualitative Imaging of Bone Using Ultrashort Echo Time Magnetic Resonance

Frontiers in Endocrinology, 2020
Bone is comprised of mineral, collagenous organic matrix, and water. X-ray-based techniques are the standard approach for bone evaluation in clinics, but they are unable to detect the organic matrix and water components in bone.
Saeed Jerban, Douglas G. Chang, Yajun Ma, Hyungseok Jang, Eric Y. Chang, Eric Y. Chang, Jiang Du   +6 more
doaj   +1 more source

High-Contrast Lumbar Spinal Bone Imaging Using a 3D Slab-Selective UTE Sequence

Frontiers in Endocrinology, 2022
Ultra-short echo time (UTE) MRI with post-processing is a promising technique in bone imaging that produces a similar contrast to computed tomography (CT).
Amir Masoud Afsahi, Alecio F. Lombardi, Alecio F. Lombardi, Zhao Wei, Michael Carl, Jiyo Athertya, Koichi Masuda, Mark Wallace, Roland R. Lee, Roland R. Lee, Ya-Jun Ma   +10 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

MRI-based porosity index (PI) and suppression ratio (SR) in the tibial cortex show significant differences between normal, osteopenic, and osteoporotic female subjects

Frontiers in Endocrinology, 2023
IntroductionUltrashort echo time (UTE) MRI enables quantitative assessment of cortical bone. The signal ratio in dual-echo UTE imaging, known as porosity index (PI), as well as the signal ratio between UTE and inversion recovery UTE (IR-UTE) imaging ...
Saeed Jerban, Saeed Jerban, Saeed Jerban, Yajun Ma, Yajun Ma, Dina Moazamian, Jiyo Athertya, Sophia Dwek, Hyungseok Jang, Hyungseok Jang, Gina Woods, Christine B. Chung, Christine B. Chung, Eric Y. Chang, Eric Y. Chang, Jiang Du, Jiang Du   +16 more
doaj   +1 more source

Ultra-short echo time cardiovascular magnetic resonance of atherosclerotic carotid plaque. [PDF]

, 2010
BACKGROUND: Multi-contrast weighted cardiovascular magnetic resonance (CMR) allows detailed plaque characterisation and assessment of plaque vulnerability.
Boyle, JJ, Chan, CF, Firmin, DN, Gatehouse, P, Keenan, NG, Nielles-Vallespin, S, Pennell, DJ, Sheppard, MN   +7 more
core   +2 more sources

MR-orthopantomography in operative dentistry and oral and maxillofacial surgery: a proof of concept study

Scientific Reports, 2023
This prospective study aimed to present, compare, and evaluate the suitability of five different magnetic resonance imaging (MRI) protocols (3D double-echo steady-state (DESS), 3D fast spin echo short-tau inversion recovery (SPACE-STIR), 3D fast spin ...
Adib Al-Haj Husain, Valérie Schmidt, Silvio Valdec, Bernd Stadlinger, Sebastian Winklhofer, Daphne Schönegg, Stefan Sommer, Mutlu Özcan, Nadin Al-Haj Husain, Marco Piccirelli   +9 more
doaj   +1 more source

Design of a realistic PET-CT-MRI phantom [PDF]

, 2011
The validation of the PET image quality of new PET-MRI systems should be done against the image quality of currently available PET-CT systems. This includes the validation of new attenuation correction methods.
Espana Palomares, Samuel, Fierens, Yves, Keereman, Vincent, Mollet, Pieter, Vandenberghe, Stefaan   +4 more
core   +1 more source