Results 21 to 30 of about 6,769 (235)
Ultrashort echo time and zero echo time MRI at 7T [PDF]
Magnetic Resonance Materials in Physics, Biology and Medicine, 2015 Zero echo time (ZTE) and ultrashort echo time (UTE) pulse sequences for MRI offer unique advantages of being able to detect signal from rapidly decaying short-T2 tissue components. In this paper, we applied 3D ZTE and UTE pulse sequences at 7T to assess differences between these methods.We matched the ZTE and UTE pulse sequences closely in terms of ...
Peder E. Z. Larson +8 more
openaire +4 more sources
Heliyon, 2023 Objectives: To image knee osteochondral specimens using magnetic resonance (MR) ultrashort echo time imaging with pointwise encoding time reduction with radial acquisition combined fat suppression (PETRA-FS) sequence to determine whether it can reveal ...
Yawen Hu +6 more
doaj +1 more source
Optimized 3D ultrashort echo time pulmonary MRI [PDF]
Magnetic Resonance in Medicine, 2012 PurposeTo optimize 3D radial ultrashort echo time MRI for high resolution whole‐lung imaging.Methods3D radial ultrashort echo time was implemented on a 3T scanner to investigate the effects of: (1) limited field‐of‐view excitation, (2) variable density readouts, and (3) radial oversampling.
Kevin M, Johnson +3 more
openaire +2 more sources
World Neurosurgery: X, 2021 Objective: Time-of-flight magnetic resonance angiography (MRA) is limited by clip-induced artifacts after cerebral aneurysmal clipping. Recently, ultrashort echo time was shown to reduce metal artifacts.
Akihiro Nishikawa +5 more
doaj +1 more source
Ultrashort echo time for improved positive-contrast manganese-enhanced MRI of cancer. [PDF]
PLoS ONE, 2013 OBJECTIVE: Manganese (Mn) is a positive magnetic resonance imaging (MRI) contrast agent that has been used to obtain physiological, biochemical, and molecular biological information.
Joris Tchouala Nofiele +1 more
doaj +1 more source
Ramped hybrid encoding for improved ultrashort echo time imaging [PDF]
Magnetic Resonance in Medicine, 2015 PurposeWe propose a new acquisition to minimize the per‐excitation encoding duration and improve the imaging capability for short T2* species.MethodsIn the proposed ramped hybrid encoding (RHE) technique, gradients are applied before the radiofrequency (RF) pulse as in pointwise encoding time reduction with radial acquisition (PETRA) and zero echo time
Hyungseok, Jang +2 more
openaire +2 more sources
Sensors, 2023 Isthmic spondylolysis results in fracture of pars interarticularis of the lumbar spine, found in as many as half of adolescent athletes with persistent low back pain. While computed tomography (CT) is the gold standard for the diagnosis of spondylolysis,
Suraj Achar +4 more
doaj +1 more source
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 +4 more
openaire +2 more sources
Frontiers in Neuroscience, 2022 PurposeQuantitative susceptibility mapping (QSM) has surfaced as a promising non-invasive quantitative biomarker that provides information about tissue composition and microenvironment.
Hyungseok Jang +12 more
doaj +1 more source
Frontiers in Oncology, 2021 PurposeTo investigate the clinical feasibility of accelerated free-breathing stack-of-spirals (spiral) three-dimensional (3D) ultrashort echo time (UTE) lung magnetic resonance imaging (MRI) using iterative self‐consistent parallel imaging reconstruction
Min Jae Cha +6 more
doaj +1 more source