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 'Inversion Recovery Sequence' 
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Result : Searchterm 'Inversion Recovery Sequence' found in 1 term [] and 9 definitions [], (+ 14 Boolean[] results
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Flip Angle
 
(FA) The flip angle a is used to define the angle of excitation for a field echo pulse sequence. It is the angle to which the net magnetization is rotated or tipped relative to the main magnetic field direction via the application of a RF excitation pulse at the Larmor frequency. It is also referred to as the tip angle, nutation angle or angle of nutation.
The radio frequency power (which is proportional to the square of the amplitude) of the pulse is proportional to a through which the spins are tilted under its influence. Flip angles between 0° and 90° are typically used in gradient echo sequences, 90° and a series of 180° pulses in spin echo sequences and an initial 180° pulse followed by a 90° and a 180° pulse in inversion recovery sequences.
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• Related Searches:
    • Abdominal Imaging
    • Pulse, 90°
    • Gradient Echo
    • Out of Phase
    • Precess
 
Further Reading:
  Basics:
What MRI Sequences Produce the Highest Specific Absorption Rate (SAR), and Is There Something We Should Be Doing to Reduce the SAR During Standard Examinations?
Thursday, 16 April 2015   by www.ajronline.org    
Mapping of low flip angles in magnetic resonance(.pdf)
Saturday, 1 January 2011   by www.hal.inserm.fr    
  News & More:
A practical guideline for T1 reconstruction from various flip angles in MRI
Saturday, 1 October 2016   by journals.sagepub.com    
Clinical evaluation of a speed optimized T2 weighted fast spin echo sequence at 3.0 T using variable flip angle refocusing, half-Fourier acquisition and parallel imaging
Wednesday, 25 October 2006
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Fluid Attenuation Inversion RecoveryInfoSheet: - Sequences - 
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(FLAIR) Fluid attenuation inversion recovery is a special inversion recovery sequence with long TI to remove the effects of fluid from the resulting images. The TI time of the FLAIR pulse sequence is adjusted to the relaxation time of the component that should be suppressed. For fluid suppression the inversion time (long TI) is set to the zero crossing point of fluid, resulting in the signal being 'erased'.
Lesions that are normally covered by bright fluid signals using conventional T2 contrast are made visible by the dark fluid technique FLAIR is an important technique for the differentiation of brain and spine lesions.

See also Inversion Recovery.
 
Images, Movies, Sliders:
 Brain MRI Coronal FLAIR 001  Open this link in a new window
    
 
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• View the DATABASE results for 'Fluid Attenuation Inversion Recovery' (5).Open this link in a new window

 
Further Reading:
  Basics:
Newer Sequences for Spinal MR Imaging: Smorgasbord or Succotash of Acronyms?
   by www.ajnr.org    
  News & More:
What MRI-Derived Data and Other Factors Reveal About White Matter Hyperintensity in Former Football Players
Saturday, 23 December 2023   by www.diagnosticimaging.com    
FLAIR Vascular Hyperintensity: An Important MRI Marker in Patients with Transient Ischemic Attack
Thursday, 14 July 2022   by www.dovepress.com    
Early Identification of Ischemic Stroke With DWI-FLAIR Mismatch
Wednesday, 5 January 2011   by www.doctorslounge.com    
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Inversion Recovery Echo Planar ImagingInfoSheet: - Sequences - 
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Modulus Image
 
Modulus images acquired with an Inversion Recovery Sequence do not take negative magnetization spin values into account. The "real" image, displayed with a bright background is recommended for correct tissue contrast.
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Turbo Inversion RecoveryInfoSheet: - Sequences - 
Intro, 
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etc.MRI Resource Directory:
 - Sequences -
 
( TIR / TIRM / IR-TSE - Inversion Recovery Turbo Spin Echo / FIR - Fast Inversion Recovery)
A turbo / fast spin echo sequence with long TI for fluid suppression (FLAIR) or with short TI for fat suppression (STIR). This sequence allows for a true inversion recovery display that shows the arithmetic sign of the signal.
TIRM means a turboIR with a magnitude display.

See also Inversion Recovery, Inversion Recovery Sequence and Fast Spin Echo.
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Further Reading:
  News & More:
Accurate T1 Quantification Using a Breath-hold Inversion Recovery TrueFISP Sequence
2003   by rsna2003.rsna.org    
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