Revision as of 09:44, 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?
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)
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
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?

@@ Line 15: / Line 15: @@
 * Acquired/Reconstructed Matrix size should match
 * Multiband factor * SENSE ~= 6
-* Half scan: no. Unless minimal TR deviates more than 10% from shortest
+* Half scan: no. Unless minimal TR deviates more than 10% from shortest. But: see Gradient mode
 * Water Fat Shift: minimal
 * Dynamic Stabilization: regular (niet enhanced, kost teveel tijd)