FSE

Question 1

What are the problems with FSE?

Answer 1

1. High RF exposure due to multiple RF refocusing
2. High ETL May have reduced spatial resolution
3. Reduced no. If slices
4. Complicated contrast behaviour
5. Multiple RF pulses generates stimulated echo
6. Slice slice variation ( unwanted MT interactions
   caused by off resonance adjacent slices)
7. Multi shot acquisition can be prone to motion artefact

Question 2

What is MBEST?

Answer 2

Use multiple GE to encode whole image within what would be readout gradient of a single PE step

Contrast is determined by spin echo part of sequence and can be manipulated by changing TE or TR