MRI sequence parameters

Listed in the table below are the most common acquisition parameters for commonly used MRI pulse sequences (in msec).

For a general introduction to these sequences please refer to MRI sequences (basic).

The specific parameters for any given study varies from one manufacturer to another, and from one imaging center to another. 

T1

  • TR: <800
  • TE: <30
  • flip angle: 90°

PD

  • TR: >1000
  • TE: <30
  • flip angle: 90°

T2

  • TR: >2000
  • TE: >80
  • flip angle: 90°

FSE T2

  • TR: >2000
  • TE: >60
  • flip angle: 90°

GRE T1

  • TR: variable
  • TE: <30
  • flip angle: 70-110°

GRE T2*

  • TR: variable
  • TE: <30
  • flip angle: 5-20°

STIR

  • TR: >2000
  • TE: >60
  • flip angle: 180 -> 90°
  • inversion time (TI): 120-170

FLAIR

  • TR: >3000
  • TE: >80
  • flip angle: variable 
  • inversion time: 1700–2200
Physics and Imaging Technology: MRI

Factors affecting T1

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rID: 21540
Section: Physics
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