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3T Multiband

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Revision as of 09:31, 15 December 2017 by Caan (talk | contribs) (Created page with "= Multiband = == Sequence-parameters == * Shimmen ** Shimbox: inside brain? Is bottomline shimbox wrt OFC / air transition most important? ** What is a good shim?LINEWIDTH ch...")
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Multiband

Sequence-parameters

  • Shimmen
    • Shimbox: inside brain? Is bottomline shimbox wrt OFC / air transition most important?
    • What is a good shim?LINEWIDTH checken voor scannen? Log values
    • Acquire extra B0-scan as check to avoid large B0-gradient?
  • Gradient mode: Set to Enhanced if duty cycle is limiting factor (enormous difference on AMC-wide bore scanner)
  • Minimal TR: to be adjusted on-scanner (not realistic in VM)
  • TE hoeft niet in phase: niet belangrijk voor vet want signaal is al dispersed met deze TE. TE~32.23, 27 is te kort.
  • Geen slice gap (maar waarom?)
  • Acquired/Reconstructed Matrix size should match
  • Multiband factor * SENSE ~= 6
  • Half scan: no. Unless minimal TR deviates more than 10% from shortest
  • Water Fat Shift: minimal
  • Dynamic Stabilization: regular (niet enhanced, kost teveel tijd)
  • Offc/Ang: free rotatable Yes
  • PNS moderate
  • Flip angle --> Ernst angle
  • Planning: stevig anguleren. Read-out richting omdraaien AP-->PA?