Results 171 to 180 of about 4,993 (209)

Assessment of Pulmonary Ventilation Using 3D Ventilation Flow Capacity‐Weighted and Ventilation‐Weighted Maps From 3D Ultrashort Echo Time (UTE) MRI

Journal of Magnetic Resonance Imaging, 2023
Three‐dimensional (3D) ventilation flow capacity‐weighted (VFCW) maps together with 3D ventilation‐weighted (VW) maps may help to better assess pulmonary function.
Seokwon Lee, H. Lee, Jinil Park, Hyeon-Sook Kim, Jang-Yeon Park   +4 more
semanticscholar   +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

Three‐Dimensional Free‐Breathing Ultrashort Echo Time (UTE) 1H MRI Regional Ventilation: Comparison With Hyperpolarized 129Xe MRI and Pulmonary Function Testing in Healthy Volunteers and People With Cystic Fibrosis

NMR in Biomedicine
MRI can provide localized assessment of lung function for monitoring people with lung disease. Hyperpolarized 129Xe MRI directly images pulmonary gas distribution but requires specialized hardware.
Fei Tan, Rachel L. Eddy, Vanessa M Diamond, Jonathan H. Rayment, P. Larson   +4 more
semanticscholar   +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

Optimized Ultrashort Echo Time – Magnetic Resonance Fingerprinting (UTE-MRF) for Myelin-Proton fraction Imaging

ISMRM Annual Meeting, 2023
Optimization of MRF (MR fingerprinting) sequence is important for encoding MR tissue parameters with the maximal SNR for better quantification of representative tissues of WM, GM and CSF. Here, we targeted ultrashort T2 tissues and proposed an optimized acquisition parameter patterns for 3D ultrashort echo time MRF sequence with the goal of achieving ...
Zihan Zhou, Qing Li, Congyu Liao, Xiaozhi Cao, Huihui Ye, Jianhui Zhong, Hongjian He   +6 more
openaire   +1 more source

Ultrashort echo time Cones double echo steady state (UTE‐Cones‐DESS) for rapid morphological imaging of short T₂ tissues

Magnetic Resonance in Medicine, 2021
PurposeIn this study, we aimed to develop a new technique, ultrashort echo time Cones double echo steady state (UTE‐Cones‐DESS), for highly efficient morphological imaging of musculoskeletal tissues with short T2s. We also proposed a novel, single‐point Dixon (spDixon)‐based approach for fat suppression.MethodsThe UTE‐Cones‐DESS sequence was ...
Hyungseok Jang, Yajun Ma, Michael Carl, Saeed Jerban, Eric Y. Chang, Jiang Du   +5 more
openaire   +2 more sources

MR-based attenuation correction for PET using an Ultrashort Echo Time (UTE) sequence

2008 IEEE Nuclear Science Symposium Conference Record, 2008
One of the limitations of a multimodality PET/MR scanner is the lack of an attenuation map to correct the PET image for attenuation. Some methods have been developed for deriving the attenuation map from a magnetic resonance image. However, the very low signal intensity of cortical bone in images acquired with conventional MR sequences makes it ...
Vincent Keereman, Stefaan Vandenberghe, Yves De Deene, Robert Luypaert, Tom Broux, Ignace Lemahieu   +5 more
openaire   +1 more source

Automated Ultrashort Echo Time ( UTE ) MRI Low Signal Volume Analysis in Stable Pediatric Cystic Fibrosis and After Elexacaftor/Tezacaftor/Ivacaftor Therapy

Journal of Magnetic Resonance Imaging
Ultrashort echo time (UTE) MRI overcomes the low signal intensity and short T 2 * of pulmonary tissues, improving image quality. Abnormally low UTE signal intensities are associated with hallmarks of cystic fibrosis (CF), including gas trapping
Brandon Zanette, J. Bierbrier, S. Munidasa, Daniel Genkin, Miranda Kirby, Felix Ratjen, Giles Santyr   +6 more
semanticscholar   +1 more source

Three-dimensional ultrashort echo time cones (3D UTE-Cones) magnetic resonance imaging of entheses and tendons

Magnetic Resonance Imaging, 2018
We present three-dimensional ultrashort echo time Cones (3D-UTE-Cones) imaging as well as quantification of T2* and magnetization transfer ratio (MTR) of Achilles tendon and its enthesis of healthy volunteers and patients with psoriatic arthritis (PsA) using a 3T scanner.
Ya-Jun, Eric Y Chang, Arthur Kavanaugh
exaly   +3 more sources

Ultrashort-echo time magnetization transfer (UTE-MT) for brain iron imaging

ISMRM Annual Meeting
We have established a novel 3D dual-echo UTE-MT imaging method to assess hyperintense T1w signal in iron-rich brain areas by eliminating the ultra-short T2 constituents of the myelin signal via the magnetization transfer (MT) technique. Our preliminary results show improved positive image contrast in deep brain areas such as the substantia nigra (SN ...
Humberto Monsivais, Gianna Nossa, Seokkyoon Hong, Taewoong Park, Fethi Erdil, Xin Shen, Antonia Susnjar, Ali Özen, Serhat Ilbey, Mark Chiew, Jessica Huber, Ulrike Dydak, Uzay Emir   +12 more
openaire   +1 more source