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Echo Planar Imaging (EPI) Family

Learn about the Echo Planar Imaging (EPI) family, that uses rapid k-space traversal following a single excitation.

Gradient Recalled Echo – Echo Planar Imaging (GRE-EPI)

  • Design: GRE excitation followed by EPI readout.
  • Key characteristics: Extremely fast acquisition; high susceptibility sensitivity.
  • Clinical applications: Rapid whole-body and neuro imaging.
  • Vendors: All vendors GRE-EPI.

Spin Echo – Echo Planar Imaging (SE-EPI)

  • Design: Spin-echo preparation followed by EPI readout.
  • Key characteristics: Reduced susceptibility compared to GRE-EPI.
  • Clinical applications: Oncology and body imaging.
  • Vendors: All vendors SE-EPI.

Trace Diffusion-Weighted Imaging (DWI)

  • Design: PGSE-based SE-EPI with multiple diffusion directions.
  • Key characteristics: Direction-independent diffusion weighting; ADC map generation.
  • Clinical applications: Stroke, brain tumors.
  • Vendors: All vendors DWI.