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Result : Searchterm 'Flow' found in 15 terms [] and 98 definitions []
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Searchterm 'Flow' was also found in the following services: 
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News  (51)  Resources  (20)  Forum  (14)  
 
GastroMARK®InfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.MRI Resource Directory:
 - Contrast Agents -
 
GastroMARK® belongs to the negative oral contrast agents (same as Lumirem®, another brand name for ferumoxsil). GastroMARK® is used to distinguish the loops of the bowel from other abdominal structures and physiology. When GastroMARK® is ingested, it flows through and darkens the stomach and the small intestine in 30 to 45 minutes. By more clearly identifying the intestinal loops, GastroMARK® improves visualization of adjacent abdominal tissues such as the pancreas.
Drug Information and Specification
NAME OF COMPOUND
Ferumoxsil, silicone-coated superparamagnetic iron oxide, USAN, AMI-121
CENTRAL MOIETY
Fe3+/Fe2+
CONTRAST EFFECT
T2*enhanced
r1=3.4, r2=3.8, B0=1.0T
PHARMACOKINETIC
Gastrointestinal
OSMOLALITY
250 mosm/kgH2O
CONCENTRATION
52.5mg Fe/300mL
DOSAGE
300 mL oral
PREPARATION
Finished product
INDICATION
Bowel marking
DEVELOPMENT STAGE
For sale
DISTRIBUTOR
See below
PRESENTATION
Bottles containing 300 mL
DO NOT RELY ON THE INFORMATION PROVIDED HERE, THEY ARE
NOT A SUBSTITUTE FOR THE ACCOMPANYING PACKAGE INSERT!
Distribution Information
TERRITORY
TRADE NAME
DEVELOPMENT
STAGE
DISTRIBUTOR
USA
GastroMARK®
For sale
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Further Reading:
  Basics:
ferumoxsil, oral suspension GastroMARK GastroMARK ®
MATERIAL SAFETY DATA SHEET
   by dailymed.nlm.nih.gov    
Searchterm 'Flow' was also found in the following services: 
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Ghosting ArtifactInfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Artifacts -
 
Quick Overview
Artifact Information
NAME
Ghosting, ghost
DESCRIPTION
Displaced reduplications of image in phase encoding direction
REASON
Motion, heartbeat, respiration
HELP
Triggering, breath hold, pharmaceuticals to reduce bowel motion
Ghosting artifacts are in the most cases caused by movements (e.g., respiratory motion, bowel motion, arterial pulsations, swallowing, and heartbeat) and appear in the phase encoding direction.
mri safety guidance
Image Guidance
Ghosting artifacts can be reduced by respiratory and cardiac triggering, the use of breath holding pulse sequences, flow compensation or presaturation pulses, depending on their origin. To reduce bowel motion also pharmaceuticals, such as glucagon or scopolamine are useful. This will decrease artifacts from both peristalsis and breathing.

See also Motion Artifact, Phase Encoded Motion Artifact, Cardiac Motion Artifact, and Artifact Reduction - Motion.
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Further Reading:
  Basics:
MRI Artifact Gallery
   by chickscope.beckman.uiuc.edu    
MRI Resources 
Developers - MRA - Directories - Open Directory Project - Online Books - MRI Centers
 
Gradient Swap
 
Flow and motion artifacts are rotated about 90°, caused by the exchange of phase and frequency encoding direction. That prevents artifacts from hiding structures of interest.
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Helmholtz Pair CoilInfoSheet: - Coils - 
Intro, 
Overview, 
etc.MRI Resource Directory:
 - Coils -
 
A Helmholtz pair consists of two identical circular magnetic coils that are placed symmetrically one on each side of the experimental area along a common axis, and separated by a distance equal to the radius of the coil. Actually, a slightly larger separation improves the field uniformity. Each coil carries an equal electrical current flowing in the same direction. A cylindrical region extending between the centers of the two coils and approximately 1/5 of their diameter will have a nearly spatially uniform magnetic field.
In MRI, the Helmholtz pair coils are used as z-gradient coils to produce linear variations in the main magnetic field along the z-axis. Also in use as z-gradient coils are the Maxwell coils (three coils in a slightly more complicated geometry than the Helmholtz configuration). These coils are only occasionally used as RF coils for imaging.
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Further Reading:
  Basics:
How strong are magnets?
   by my.execpc.com    
Helmholtz coil
   by en.wikipedia.org    
Imaging Hardware
   by www.fmrib.ox.ac.uk    
  News & More:
Design & Development of Helmholtz Coil for Hyperpolarized MRI
2010   by www.comsol.com    
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Insulator
 
Material that inhibits the flow of electricity.
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MRI Resources 
Pediatric and Fetal MRI - Spine MRI - Pacemaker - MRI Technician and Technologist Schools - Services and Supplies - Artifacts
 
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