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Result : Searchterm 'MRA' found in 2 terms [] and 57 definitions []
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SPEEDER™
 
SPEEDER™ is Toshiba's patented parallel imaging technology for high-speed imaging. This technique reduces examination time for MRI studies by a factor of up to three while enabling clinicians to capture high-quality images with detailed diagnostic information. With SPEEDER™, cardiac and MRA examinations are more patient-friendly and tolerable with shorter scan times and improved image quality.

See also Sensitivity Encoding.
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Schering AlmanMRI Resource Directory:
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[This entry is marked for removal.]

Schering Alman, was a subsidiary of Schering AG, a local distributor of contrast media and pharmaceutical's in Turkey.
In June 2006 Bayer AG has bought the majority of shares of Schering AG. As a result of this take-over Schering AG has been renamed in December 2006 in Bayer Schering Pharma AG.
Contact Information
MAIL
Bayer Türk Kimya San. Ltd. Þti.
Çakmak Mah. Balkan Cad. No:53
34770 Ümraniye / Ýstanbul
PHONE
(0 216) 528 36 00
FAX
(0 216) 527 87 00
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Stepping Kinematic Imaging Platform
 
Magnetic Moments L.L.C. (Berkeley, MI), developer of accessories for MRI and MR angiography procedures, received FDA 510(k) clearance to market its SKIP TM Stepping Kinematic Imaging Platform. This MRI accessory is used for manual repositioning of patients in the magnet isocenter for multistation dynamic contrast enhanced MRA or whole-body MRI surveys.
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Tilt Optimized Nonsaturated Excitation
 
(TONE) Used to decrease the saturation effect of inflowing blood in 3D MRA scans, the flip angle varies linearly over the excited chunk. In multi chunk scans TONE decreases the Venetian blind artifact or allows thicker chunks to cover a larger anatomical region.

See also Variable Flip Angle.
 
Images, Movies, Sliders:
 Circle of Willis, Time of Flight, MIP  Open this link in a new window
    
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• View the DATABASE results for 'Tilt Optimized Nonsaturated Excitation' (2).Open this link in a new window

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Time of Flight AngiographyInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - MRA -
 
(TOF) The time of flight angiography is used for the imaging of vessels. Usually the sequence type is a gradient echo sequences with short TR, acquired with slices perpendicular to the direction of blood flow.
The source of diverse flow effects is the difference between the unsaturated and presaturated spins and creates a bright vascular image without the invasive use of contrast media. Flowing blood moves unsaturated spins from outside the slice into the imaging plane. These completely relaxed spins have full equilibrium magnetization and produce (when entering the imaging plane) a much higher signal than stationary spins if a gradient echo sequence is generated. This flow related enhancement is also referred to as entry slice phenomenon, or inflow enhancement.
Performing a presaturation slab on one side parallel to the slice can selectively destroy the MR signal from the in-flowing blood from this side of the slice. This allows the technique to be flow direction sensitive and to separate arteriograms or venograms. When the local magnetization of moving blood is selectively altered in a region, e.g. by selective excitation, it carries the altered magnetization with it when it moves, thus tagging the selected region for times on the order of the relaxation times.
For maximum flow signal, a complete new part of blood has to enter the slice every repetition (TR) period, which makes time of flight angiography sensitive to flow-velocity. The choice of TR and slice thickness should be appropriate to the expected flow-velocities because even small changes in slice thickness influences the performance of the TOF sequence. The use of sequential 2 dimensional Fourier transformation (2DFT) slices, 3DFT slabs, or multiple 3D slabs (chunks) are depending on the coverage required and the range of flow-velocities.
3D TOF MRA is routinely used for evaluating the Circle of Willis.

See also Magnetic Resonance Angiography and Contrast Enhanced Magnetic Resonance Angiography.
 
Images, Movies, Sliders:
 TOF-MRA Circle of Willis Inverted MIP  Open this link in a new window
    

 Circle of Willis, Time of Flight, MIP  Open this link in a new window
    
SlidersSliders Overview

 
Radiology-tip.comradCT Angiography,  Coronary Angiogram
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Medical-Ultrasound-Imaging.comColor Power Angio,  Doppler Ultrasound
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• View the DATABASE results for 'Time of Flight Angiography' (11).Open this link in a new window

 
Further Reading:
  Basics:
MR–ANGIOGRAPHY(.pdf)
  News & More:
Magnetic resonance angiography: current status and future directions
Wednesday, 9 March 2011   by www.jcmr-online.com    
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