Results 61 to 70 of about 3,288 (238)

High contrast cartilaginous endplate imaging using a 3D adiabatic inversion‐recovery‐prepared fat‐saturated ultrashort echo time (3D IR‐FS‐UTE) sequence [PDF]

, 2021
Ultrashort echo time (UTE) sequences can image tissues with transverse T 2 /T 2 * relaxations too short to be efficiently observed on routine clinical MRI sequences, such as the vertebral body cartilaginous endplate (CEP).
Jonathan Wong, Wei, Zhao, Ma, Ya‐Jun, Lombardi, Alecio F, Koichi Masuda, Ya‐Jun Ma, Chang, Eric Y, Eric Y. Chang, Zhao Wei, Michael Carl, Alecio F. Lombardi, Mark Wallace, Masuda, Koichi, Lee, Roland R, Roland R. Lee, Wallace, Mark, Wong, Jonathan, Carl, Michael, Jiang Du, Du, Jiang   +19 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

Cardiovascular ultrashort echo time to map fibrosis—promises and challenges

The British Journal of Radiology, 2019
Increased collagen, or fibrosis, is an important marker of disease and may improve identification of patients at risk. In addition, fibrosis imaging may play an increasing role in guiding therapy and monitoring its effectiveness. MRI is the most frequently used modality to detect, visualize and quantify fibrosis non-invasively.
Joanne D Schuijf, Bharath Ambale-Venkatesh, Yoshimori Kassai, Yoko Kato, Larry Kasuboski, Hideki Ota, Shelton D Caruthers, João AC Lima   +7 more
openaire   +3 more sources

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

Imaging of the Achilles tendon in spondyloarthritis: a comparison of ultrasound and conventional, short and ultrashort echo time MRI with and without intravenous contrast [PDF]

, 2010
OBJECTIVES: To compare conventional MRI, ultrashort echo time MRI and ultrasound for assessing the extent of tendon abnormalities in spondyloarthritis. METHODS: 25 patients with spondyloarthritis and Achilles symptoms were studied with MRI and ultrasound.
McGonagle, D., Hodgson, R. J., Robson, MD, L. Coates, Helliwell, P., Helliwell, P, Coates, L., Evans, R, Evans, R., O'Connor, PJ, Emery, P., H. Marzo-Ortega, Robson, Matthew, Hodgson, RJ, Marzo-Ortega, H., P. J. O’Connor, Grainger, A. J., A. J. Grainger, Marzo-Ortega, H, McGonagle, D, O'Connor, P. J., R. Evans, Grainger, AJ, R. J. Hodgson, P. Helliwell, M. D. Robson, Coates, L, P. Emery, Emery, P, D. McGonagle, Robson, M. D.   +30 more
core   +1 more source

Effective Detection of Nafion^®-Based Theranostic Nanocapsules Through ¹⁹F Ultra-Short Echo Time MRI

Nanomaterials, 2020
The application of the Three-Dimensional Ultra-Short Echo Time (3D UTE)pulse sequence at a high magnetic field for visualization of the distribution of 19F loaded theranostic core-shell nanocapsules with Nafion® (1,1,2,2-tetrafluoroethene; 1,1,2,2 ...
Natalia Łopuszyńska, Krzysztof Szczepanowicz, Krzysztof Jasiński, Piotr Warszyński, Władysław P. Węglarz   +4 more
doaj   +1 more source

The accuracy of ultrashort echo time MRI sequences for medical additive manufacturing [PDF]

Dentomaxillofacial Radiology, 2016
Additively manufactured bone models, implants and drill guides are becoming increasingly popular amongst maxillofacial surgeons and dentists. To date, such constructs are commonly manufactured using CT technology that induces ionizing radiation. Recently, ultrashort echo time (UTE) MRI sequences have been developed that allow radiation-free imaging of ...
Maureen van Eijnatten, Erik-Jan Rijkhorst, Mark Hofman, Tymour Forouzanfar, Jan Wolff   +4 more
openaire   +7 more sources

MR-based attenuation correction using ultrashort-echo-time pulse sequences in dementia patients. [PDF]

, 2015
Attenuation correction (AC) is a critical requirement for quantitative PET reconstruction. Accounting for bone information in the attenuation map (? map) is of paramount importance for accurate brain PET quantification.
Cabello, Jorge;Lukas, Mathias;Forster, Stefan;Pyka, Thomas;Nekolla, Stephan G;Ziegler, Sibylle I
core   +1 more source

Measurement of bound and pore water T1 relaxation times in cortical bone using three‐dimensional ultrashort echo time cones sequences [PDF]

, 2017
PurposeWe present three-dimensional ultrashort echo time Cones (3D UTE Cones) techniques for quantification of total water T1 ( T1TW), bound water T1 ( T1BW), and pore water T1 ( T1PW) in vitro and in vivo using a 3 Tesla (T) scanner.MethodsT1TW, T1BW ...
Chen, Jun, Wu, Zhihong, Ma, Yajun, Chen, Bimin, Carl, Michael, Shao, Hongda, Du, Jiang, Chang, Eric Y   +7 more
core   +1 more source

Ultrashort-T2* mapping at 7 tesla using an optimized pointwise encoding time reduction with radial acquisition (PETRA) sequence at standard and extended echo times.

PLoS ONE
Zero echo time (ZTE) sequences capture signal from tissues with extremely short T2* and are useful for qualitative and quantitative imaging of musculoskeletal tissues' ultrashort-T2* components. One such sequence is Pointwise Encoding Time Reduction with
Carly A Lockard, Bruce M Damon, Hacene Serrai   +2 more
doaj   +1 more source