Results 211 to 220 of about 6,676 (242)

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

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
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

Functional magnetic resonance imaging with an ultrashort echo time.

Medical physics, 2013
The purpose of the authors study was to investigate a functional MRI (fMRI) technique with an ultrashort echo-time (UTE) sequence.An UTE-based fMRI technique was applied to 17 young healthy volunteers during visual stimulations on a 3T MRI system. In addition, a blood oxygen level-dependent (BOLD) fMRI image was also obtained to compare functional ...
Min-Ji, Kim, Geon-Ho, Jahng, Soo-Yeol, Lee, Chang-Woo, Ryu   +3 more
openaire   +3 more sources

Selective Excitation for Ultrashort Echo Time Imaging

2012
Magnetic resonance imaging (MRI) is generally performed using a slice-selective excitation followed by 2D Fourier transform gradient encoding. This limits the minimum echo times to a few milliseconds, making signal components with short T2 relaxation times invisible. This article describes an alternative method for selective excitation that allows echo
openaire   +1 more source

Comparison of lung imaging using three-dimensional ultrashort echo time and zero echo time sequences: preliminary study

European Radiology, 2018
To determine the feasibility of using high-resolution volumetric zero echo time (ZTE) sequence in routine lung magnetic resonance imaging (MRI) and compare free breathing 3D ultrashort echo time (UTE) and ZTE lung MRI in terms of image quality and small-nodule detection.Our Institutional Review Board approved this study.
Kyungsoo Bae, Kyung Nyeo Jeon, Moon Jung Hwang, Joon Sung Lee, Ji Young Ha, Kyeong Hwa Ryu, Ho Cheol Kim   +6 more
openaire   +2 more sources

Ultrashort echo time imaging using pointwise encoding time reduction with radial acquisition (PETRA)

Magnetic Resonance in Medicine, 2011
AbstractSequences with ultrashort echo times enable new applications of MRI, including bone, tendon, ligament, and dental imaging. In this article, a sequence is presented that achieves the shortest possible encoding time for each k‐space point, limited by pulse length, hardware switching times, and gradient performance of the scanner.
David M, Grodzki, Peter M, Jakob, Bjoern, Heismann   +2 more
openaire   +2 more sources

Three‐dimensional ultrashort echo‐time imaging using a FLORET trajectory

Magnetic Resonance in Medicine, 2016
PurposeThree‐dimensional ultrashort echo‐time (UTE) imaging commonly makes use of an isotropic 3D radial projection acquisition. The FLORET sequence is proposed and evaluated as a more efficient alternative. Methods: The properties of the FLORET trajectory are contrasted with those of a 3D radial projection trajectory.
Ryan K, Robison, Ashley G, Anderson, James G, Pipe   +2 more
openaire   +2 more sources