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 'Driven Equilibrium' 
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Driven EquilibriumInfoSheet: - Sequences - 
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In fast imaging sequences driven equilibrium sensitizes the sequence to variations in T2. This MRI technique turns transverse magnetization Mxy to the longitudinal axis using a pulse rather than waiting for T1 relaxation.
The first two pulses form a spin echo and, at the peak of the echo, a second 90° pulse returns the magnetization to the z-axis in preparation for a fresh sequence. In the absence of T2 relaxation, then all the magnetization can be returned to the z-axis. Otherwise, T2 signal loss during the sequence will reduce the final z-magnetization.
The advantage of this sequence type is, that both longitudinal and also transverse magnetization are back to equilibrium in a shorter amount of time. Therefore, contrast and signal can be increased while using a shorter TR. This pulse type can be applied to other sequences like FSE, GE or IR.

Sequences with driven equilibrium:
Driven Equilibrium Fast Gradient Recalled acquisition in the steady state - DE FGR,
Driven Equilibrium Fourier Transformation - DEFT,
Driven Equilibrium magnetization preparation - DE prep,
Driven Equilibrium Fast Spin Echo - DE FSE.
 
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• Related Searches:
    • Fourier Transformation
    • Contrast Enhanced Gradient Echo Sequence
    • Transverse Magnetization
    • Driven Equilibrium Magnetization Preparation
    • Steady State Free Precession
 
Further Reading:
  Basics:
3D Turbo Spin-Echo Sequence with Motion-Sensitized Driven-Equilibrium Preparation for Detection of Brain Metastases on 3T MR Imaging
Saturday, 3 December 2011   by www.ajnr.org    
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Advances in high-field MR imaging of the spine
Wednesday, 5 August 2009   by www.appliedradiology.com    
Comparison of New Methods for Magnetic Resonance Imaging of Articular Cartilage(.pdf)
2002
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Driven Equilibrium Fast Spin EchoInfoSheet: - Sequences - 
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(DE FSE) A fast spin echo sequence with application of a pulse, which sensitizes the sequence to variations in T2.
 
Images, Movies, Sliders:
 MRI of the Skull Base  Open this link in a new window
    
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Metal Artefact Reduction
Thursday, 9 June 2011   by www.revisemri.com    
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Driven Equilibrium Fourier TransformationInfoSheet: - Sequences - 
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(DEFT) This sequence enhances fluid signal by using a 'tip-up' pulse following a spin echo train.
See Driven Equilibrium and Fourier Transformation Imaging.
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Driven Equilibrium Magnetization PreparationInfoSheet: - Sequences - 
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(DE prep) See Driven Equilibrium.
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Driven Equilibrium Fast Gradient Recalled Acquisition in the Steady StateInfoSheet: - Sequences - 
Intro, 
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(DE FGR) A gradient echo sequence using a pulse, which sensitizes the sequence to variations in T2, rather than waiting for T1 relaxation.
See Driven Equilibrium, Gradient Recalled Echo Sequence and Steady State Free Precession.
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