Results 211 to 220 of about 3,288 (238)
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Ultrashort Echo Time Imaging of Articular Cartilage
2016Most 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 +3 more
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Qualitative and quantitative ultrashort echo time (UTE) imaging of cortical bone
Journal of Magnetic Resonance, 2010We describe the use of two-dimensional ultrashort echo time (2D UTE) sequences with minimum TEs of 8 μs to image and quantify cortical bone on a clinical 3T scanner. An adiabatic inversion pulse was used for long T(2) water and fat signal suppression.
Jiang, Du +5 more
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Selective Excitation for Ultrashort Echo Time Imaging
2012Magnetic 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
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Two-dimensional ultrashort echo time imaging using a spiral trajectory
Magnetic Resonance Imaging, 2008Tissues 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 +3 more
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Electrical Conductivity Mapping Using Ultrashort Echo Time Double Echo Steady State
ISMRM Annual MeetingElectrical 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 +6 more
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Ultrashort Echo Time MRI for Pediatric Patients with Craniofacial Abnormalities
ISMRM Annual MeetingMotivation: Ionizing radiation risk from CT remains a concern for pediatric patients with craniofacial abnormalities. Goal(s): Use high-resolution bone-selective MRI for cranial bone imaging and evaluate feasibility in pediatric patients. Approach: We quantitatively assessed a new echo-subtraction UTE sequence against clinical CT and another well-known
Nada Kamona +12 more
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Cartesian Ultrashort Echo Time (CUTE) Imaging of the Lung Parenchyma
ISMRM Annual MeetingThe Cartesian UTE (CUTE) sequence provides high quality three-dimensional imaging of the lung parenchyma (TE = 140 us) without the requirement for k-space gridding in a short breath-hold. Phantom validation and comparison to an existing UTE sequence (Spiral VIBE) is provided in 64 healthy subjects and in clinical examples.
Richard Thompson +5 more
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MRI of the lung: comparison of ultrashort-echo-time (UTE) to zero-echo-time (ZTE)
RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren, 2011NC Chuck +5 more
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Assessment of cortical bone with clinical and ultrashort echo time sequences.
Magnetic resonance in medicine, 2015We describe the use of ultrashort echo time (UTE) sequences and fast spin echo sequences to assess cortical bone using a clinical 3T scanner. Regular two- and three-dimensional UTE sequences were used to image both bound and free water in cortical bone.
Jiang, Du +6 more
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