Revision as of 10:27, 15 December 2017

Multiband

Shimming
- 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?
- Use Maarten's patch for image based shimming: this patch applies shim to B0-prescan
TR:
- for physiological noise correction, aim for 750ms
- minimal TR: to be adjusted on-scanner (not realistic in VM)
Gradient mode: Set to Enhanced if duty cycle is limiting factor (enormous difference on AMC-wide bore scanner)
Water Fat Shift: minimal. Increase to reduce TR
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. But: see Gradient mode
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?

@@ Line 20: / Line 20: @@
 * Offc/Ang: free rotatable Yes
 * PNS moderate
-* Flip angle --> Ernst angle
+* Flip angle --> [http://www.mritoolbox.com/ErnstAngle.html Ernst angle]
 * Planning: stevig anguleren. Read-out richting omdraaien AP-->PA?