scholarly journals Sinogram-based coil selection for streak artifact reduction in undersampled radial real-time magnetic resonance imaging

2016 ◽  
Vol 6 (5) ◽  
pp. 552-556 ◽  
Author(s):  
H. Christian M. Holme ◽  
Jens Frahm
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Real Time ◽  
Artifact Reduction ◽  
Resonance Imaging ◽  
Streak Artifact ◽  
Selection For

Articulatory Synthesis Based on Real-Time Magnetic Resonance Imaging Data

2016 ◽  
Author(s):  
Asterios Toutios ◽  
Tanner Sorensen ◽  
Krishna Somandepalli ◽  
Rachel Alexander ◽  
Shrikanth S. Narayanan
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Real Time ◽  
Imaging Data ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Data ◽  
Articulatory Synthesis

Comparison of metal artifact reduction techniques in magnetic resonance imaging of carbon-reinforced PEEK and titanium spinal implants

2021 ◽  
pp. 028418512110290
Author(s):  
Georg Osterhoff ◽  
Florian A Huber ◽  
Laura C Graf ◽  
Ferdinand Erdlen ◽  
Hans-Christoph Pape ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Pedicle Screws ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Signal Loss ◽  
Resonance Imaging ◽  
Spinal Implants ◽  
Titanium Screws

Background Carbon-reinforced PEEK (C-FRP) implants are non-magnetic and have increasingly been used for the fixation of spinal instabilities. Purpose To compare the effect of different metal artifact reduction (MAR) techniques in magnetic resonance imaging (MRI) on titanium and C-FRP spinal implants. Material and Methods Rod-pedicle screw constructs were mounted on ovine cadaver spine specimens and instrumented with either eight titanium pedicle screws or pedicle screws made of C-FRP and marked with an ultrathin titanium shell. MR scans were performed of each configuration on a 3-T scanner. MR sequences included transaxial conventional T1-weighted turbo spin echo (TSE) sequences, T2-weighted TSE, and short-tau inversion recovery (STIR) sequences and two different MAR-techniques: high-bandwidth (HB) and view-angle-tilting (VAT) with slice encoding for metal artifact correction (SEMAC). Metal artifact degree was assessed by qualitative and quantitative measures. Results There was a much stronger effect on artifact reduction with using C-FRP implants compared to using specific MRI MAR-techniques (screw shank: P < 0.001; screw tulip: P < 0.001; rod: P < 0.001). VAT-SEMAC sequences were able to reduce screw-related signal loss artifacts in constructs with titanium screws to a certain degree. Constructs with C-FRP screws showed less artifact-related implant diameter amplification when compared to constructs with titanium screws ( P < 0.001). Conclusion Constructs with C-FRP screws are associated with significantly less artifacts compared to constructs with titanium screws including dedicated MAR techniques. Artifact-reducing sequences are able to reduce implant-related artifacts. This effect is stronger in constructs with titanium screws than in constructs with C-FRP screws.

Real-time visualization and characterization of liposomal delivery into the monkey brain by magnetic resonance imaging

2005 ◽  
Vol 16 (1-3) ◽  
pp. 20-26 ◽  
Author(s):  
Michal T. Krauze ◽  
Tracy R. Mcknight ◽  
Yoji Yamashita ◽  
John Bringas ◽  
Charles O. Noble ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Real Time ◽  
Resonance Imaging ◽  
Monkey Brain ◽  
Real Time Visualization ◽  
Liposomal Delivery

scholarly journals Dynamic near-real-time magnetic resonance imaging for analyzing the velopharyngeal closure in comparison with videofluoroscopy

2004 ◽  
Vol 20 (5) ◽  
pp. 791-797 ◽  
Author(s):  
Ambros J. Beer ◽  
Paul Hellerhoff ◽  
Angela Zimmermann ◽  
Katalin Mady ◽  
Robert Sader ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Real Time ◽  
Resonance Imaging ◽  
Velopharyngeal Closure

scholarly journals Feasibility and reproducibility of biventricular volumetric assessment of cardiac function during exercise using real-time radialk-tSENSE magnetic resonance imaging

2009 ◽  
Vol 29 (5) ◽  
pp. 1062-1070 ◽  
Author(s):  
Philipp Lurz ◽  
Vivek Muthurangu ◽  
Silvia Schievano ◽  
Johannes Nordmeyer ◽  
Philipp Bonhoeffer ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cardiac Function ◽  
Real Time ◽  
Resonance Imaging ◽  
Volumetric Assessment

Real-time magnetic resonance imaging of laser heat deposition in tissue

1991 ◽  
Vol 21 (1) ◽  
pp. 132-137 ◽  
Author(s):  
Alan R. Bleier ◽  
Ferenc A. Jolesz ◽  
Mark S. Cohen ◽  
Robert M. Weisskoff ◽  
Julianne J. Dalcanton ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Real Time ◽  
Resonance Imaging ◽  
Laser Heat ◽  
Heat Deposition
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