Results 201 to 210 of about 6,769 (235)

Qualitative and Quantitative Ultrashort Echo Time Imaging of Musculoskeletal Tissues [PDF]

Seminars in Musculoskeletal Radiology, 2015
Ultrashort echo time (UTE) sequences represent a group of clinically compatible techniques that are capable of using echo times < 1 ms. With these techniques, direct imaging of short T2/T2* tissues or tissue components can now be performed. Continuing modifications to the UTE techniques have allowed for faster and more robust sequences now comparable ...
Jiang Du, Won C Bae, Christine B Chung
exaly   +5 more sources

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Ultrashort echo time imaging with bicomponent analysis

Magnetic Resonance in Medicine, 2011
AbstractBiological tissues frequently contain different water compartments, and these often have distinct transverse relaxation times. Quantification of these may be problematic on clinical scanners because spin echo sequences usually have initial echo times that are too long to accurately quantify shorter relaxation time components.
Jiang, Du, Eric, Diaz, Michael, Carl, Won, Bae, Christine B, Chung, Graeme M, Bydder   +5 more
openaire   +2 more sources

Ultrashort Echo-Time MR Imaging of the Pediatric Head and Neck

Magnetic Resonance Imaging Clinics of North America, 2021
Bone MR imaging techniques use extremely rapid echo times to maximize detection of short-T2 tissues with low water concentrations. The major approaches used in clinical practice are ultrashort echo-time and zero echo-time. Synthetic CT generation is feasible using atlas-based, voxel-based, and deep learning approaches.
Naoharu Kobayashi, Sven Bambach, Mai-Lan Ho   +2 more
exaly   +3 more sources

Clinical ultrashort echo time imaging of bone and other connective tissues [PDF]

NMR in Biomedicine, 2006
AbstractThe background underpinning the clinical use of ultrashort echo time, SPRITE and other pulse sequences for imaging bone and other connective tissues with short T2 is reviewed. Features of the basic physics relevant to UTE imaging are described, including the consequences when the radiofrequency pulse duration is of the order of T2 so that ...
Matthew D Robson, Graeme M Bydder
exaly   +4 more sources

Quantitative Ultrashort Echo Time (UTE) imaging of Osteochondral Junction

ISMRM Annual Meeting, 2023
MRI-based compositional imaging of cartilage has higher sensitivity to detect early changes in osteoarthritis. The osteochondral junction (OCJ) is of particular interest since it has been associated with early changes and progression of cartilage degeneration.
Alecio Lombardi, Zhao Wei, Dina Moazamian, Saeed Jerban, Hyungseok Jang, Nicole Le, Jiang Du, Christine Chung, Eric Chang, Ya-Jun Ma   +9 more
openaire   +1 more source

Two-dimensional ultrashort echo time imaging using a spiral trajectory

Magnetic Resonance Imaging, 2008
Tissues with very short transverse relaxation time (T2) cannot be detected using conventional magnetic resonance (MR) sequences due to the rapid decay of excited MR signals. In this work, a multiecho sequence employing half-pulse excitation and spiral sampling was developed for ultrashort echo time (UTE) imaging of tissues with short T2. Spiral readout
Jiang, Du, Mark, Bydder, Atsushi M, Takahashi, Christine B, Chung   +3 more
openaire   +2 more sources

Ultrashort Echo Time Imaging of Articular Cartilage

2016
Most of the currently available clinical and research magnetic resonance imaging techniques have focused on the more superficial layers of articular cartilage. This has mainly been because the study of early and late alterations to the deeper layers of cartilage, including the deep radial zone and calcified cartilage, has not been possible due to the ...
Soorena Azam Zanganeh, Hongda Shao, Graeme M. Bydder, Jiang Du   +3 more
openaire   +1 more source

Ultrashort echo time (UTE) MRI of the spine in thalassaemia

The British Journal of Radiology, 2004
Back pain is common in adult patients with homozygous thalassaemia, and degenerative disc disease is increasingly recognised as a cause. Ultrashort echo time (UTE) pulse sequences, which are sensitive to the presence of short T(2) relaxation components in tissue produced by iron deposition and other processes, were used to examine the lower thoracic ...
M A, Hall-Craggs, J, Porter, P D, Gatehouse, G M, Bydder   +3 more
openaire   +2 more sources

Electrical Conductivity Mapping Using Ultrashort Echo Time Double Echo Steady State

ISMRM Annual Meeting
Electrical conductivity is an intrinsic tissue property. At the Larmor frequency of the MR system (i.e., ~128 MHz at 3T), the electrical conductivity reflects the tissue composition and ionic contents. Electrical conductivity mapping (ECM) has recently emerged as a promising MR-based biomarker.
Hyungseok Jang, Sam Sedaghat, Soo Hyun Shin, Saeed Jerban, Yajun Ma, Eric Chang, Jiang Du   +6 more
openaire   +1 more source

Magnetization Transfer - Ultrashort Echo Time (MT-UTE) Imaging

2012
Ultrashort echo time sequences provide the possibility of visualizing tissues with extremely fast signal decay on whole-body MR scanners. For detailed investigations of tissue structure, magnetization transfer (MT) experiments can be performed if ultrashort echo time sequences are combined with MT-preparation schemes.
Fabian Springer, Petros Martirosian, Fritz Schick   +2 more
openaire   +1 more source