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Result : Searchterm 'Equilibrium' found in 7 terms [] and 29 definitions []
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Longitudinal Magnetization
 
(Mz) The component of the net magnetization vector in the direction of the static magnetic field (z). After RF excitation, this vector returns to its equilibrium value at a rate characterized by the time constant T1.
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• Related Searches:
    • T1 Time
    • Saturation Recovery
    • Magnitude
    • Spin Lattice Relaxation Time
    • Relaxation Effect
Searchterm 'Equilibrium' was also found in the following service: 
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Radiology  (3) Open this link in a new window
Longitudinal Relaxation
 
Return of longitudinal magnetization to its equilibrium value after excitation;; requires exchange of energy between the nuclear spins and the lattice. See also T1 Time.
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MRI Resources 
Abdominal Imaging - Shoulder MRI - Case Studies - Contrast Agents - Health - Safety Products
 
Longitudinal Relaxation Time
 
The T1 time constant, which determines the rate at which excited protons return to equilibrium within the lattice. The longitudinal relaxation time is a measure of the time taken for spinning protons to realign with the external magnetic field. The magnetization will grow after excitation from zero to a value of about 63% of its final value in a time of T1.

See also T1 Time.
 
Images, Movies, Sliders:
 Brain MRI Images T1  Open this link in a new window
 Sagittal Knee MRI Images T1 Weighted  Open this link in a new window
 
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Resources  (1)  
 
MSK-Extreme™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.onicorp.com/ From ONI Medical Systems, Inc.;
MSK-Extreme™MRI system is a dedicated high field extremity imaging device, designed to provide orthopedic surgeons and other physicians with detailed diagnostic images of the foot, ankle, knee, hand, wrist and elbow, all with the clinical confidence and advantages derived from high field, whole body MRI units. The light weight (less than 650 kg) of the OrthOne System performs rapid patient studies, is easy to operate, has a patient friendly open environment and can be installed in a practice office or hospital, all at a cost similar to a low field extremity machine.
New features include a more powerful operating system that offers increased scan speed as well as a 160-mm knee coil with higher signal to noise ratio, and the option of a CD burner.
Device Information and Specification
CLINICAL APPLICATION
Dedicated extremity imaging
CONFIGURATION
16 cm knee, 18 cm lower extremity;; 12.3 cm upper extremity, additional high resolution v-SPEC Coils: 80 mm, 100 mm, or 145 mm.
SYNCHRONIZATION
No
PULSE SEQUENCES
SE, FSE, GE2D, GE3D, Inversion recovery (IR), Driven Equilibrium, Fat Saturation (FS), STIR, MT, PD, Flow Compensation (FC), RF spoiling, MTE, No Phase Wrap (NPW)
IMAGING MODES
Scout, single, multislice, volume
TR
10-10,000ms; 1ms steps
TE
5-150ms; 1 ms steps
SINGLE/MULTI SLICE
2D less than 200 msec/image
4cm-16cm
2D: 2mm-10mm/.1mm incr.
Up to 1,000x1,000
MEASURING MATRIX
X/Y: 64-512; 2 pixel steps
PIXEL INTENSITY
4,096 grey lvls; 256 lvls in 3D
28cm ID x 50cm L
MAGNET WEIGHT
635 kg
H*W*D
146 x 69 x 84 cm
POWER REQUIREMENTS
115VAC, 1phase, 20A; 208VAC, 3 phase, 30A
COOLING SYSTEM TYPE
LHe with 2 stage cold head
Negligible
STRENGTH
15 mT/m
5-GAUSS FRINGE FIELD
1.25m radial x 1.8m axial
Passive
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Further Reading:
  Basics:
MSK Extreme Brochure(.pdf)
   by www.nova-logic.ch    
MSK Extreme Specifications(.pdf)
   by www.nova-logic.ch    
Searchterm 'Equilibrium' was also found in the following service: 
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Radiology  (3) Open this link in a new window
Magnetic FieldForum -
related threads
 
(H) The region surrounding a magnet (or current carrying conductor) is equipped with certain properties like that a small magnet in such a region experiences a torque that tends to align it in a given direction. Magnetic field is a vector quantity; the direction of the field is defined as the direction that the north pole of the small magnet points when in equilibrium.
mri safety guidance
MRI Safety Guidance
A magnetic field produces a magnetizing force on a body within it. Although the dangers of large magnetic fields are largely hypothetical, this is an area of potential concern for safety limits. Formally, the forces experienced by moving charged particles, current carrying wires, and small magnets in the vicinity of magnet are due to magnetic induction (B), which includes the effect of magnetization, while the magnetic field (H) is defined so as not to include magnetization. However, both B and H are often loosely used to denote magnetic fields.
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• View the NEWS results for 'Magnetic Field' (25).Open this link in a new window.
 
Further Reading:
  Basics:
Magnet basics
   by my.execpc.com    
Magnetic Field
   by hyperphysics.phy-astr.gsu.edu    
Magnetic Field
   by en.wikipedia.org    
How strong are magnets?
   by my.execpc.com    
  News & More:
Impact of Magnetic Field Inhomogeneity on the Quality of Magnetic Resonance Images and Compensation Techniques: A Review
Saturday, 1 October 2022   by www.dovepress.com    
Impact of the Lorentz force on electron track structure and early DNA damage yields in magnetic resonance-guided radiotherapy
Friday, 30 September 2022   by www.nature.com    
Two stuck to MRI machine for 4 hrs
Tuesday, 11 November 2014   by www.mumbaimirror.com    
Commission proposes to revamp rules to protect EU workers from harmful electromagnetic fields
Tuesday, 14 June 2011   by finchannel.com    
Magnetic fields drive drug-loaded nanoparticles to reduce blood vessel blockages in an animal study
Monday, 19 April 2010   by www.eurekalert.org    
MRI Resources 
Non-English - Blood Flow Imaging - Mobile MRI - Fluorescence - Corporations - Jobs pool
 
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