Ultrahigh field MRI

Dr Daniel J Bell et al.

Ultrahigh field (UHF) magnetic resonance imaging refers to any MRI scanner with a main magnetic field (B0) strength of 7 tesla or greater. Until recently purely a research tool, following the introduction of the first 7 T clinical scanner in 2017, there are now a slowly increasing number of academic centers worldwide with ultrahigh field scanners in clinical use. Also several research scanners with even higher field strengths are in operation 1.

Advantages

Disadvantages

  • increase in side effects: dizziness, nausea, metallic dysgeusia, vertigo 1,2
  • increased magnetic susceptibility
    • image degradation artifacts
  • increased specific absorption rate (SAR)
    •  smaller flip angles, longer TRs, prolonged breath holds, decreased slices
  • increased T1 relaxation time
    • prolonged acquisition time
  • decreased T2/T2* relaxation time
Physics and Imaging Technology: MRI
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Article information

rID: 69050
Section: Physics
Synonyms or Alternate Spellings:
  • Very high field MRI
  • 7.0 T MRI
  • 7.0 tesla MRI
  • seven tesla MRI
  • 7 T MRI
  • 7 tesla MRI
  • Ultra-high field (UHF) nuclear magnetic resonance
  • Ultra-high field (UHF) NMR
  • Ultrahigh field (UHF) MRI
  • Ultra high field (UHF) MRI
  • Ultra-high field (UHF) MRI
  • Ultra-high field (UHF) magnetic resonance imaging

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