MRS Flashcards
1
Q
How does gyromagnetic ratio affect SNR?
A
Signal decreases with gyromagnetic ratio
2
Q
Three clinical examples for 1H brain MRS?
A
NAA reduces in stroke
Myo-inositol increases in glioma
Choline increases in maglignant tumour
3
Q
Clinical example of 31P MRS?
A
ATP -> energy + PO4 + ADP
ATP + creatine <-> ADP + Pcr
4
Q
Clinical example of 13C MRS?
A
Look at metabolic pathways using tagged glucose tracer study
5
Q
Three uses of 23Na MRS?
A
Intracellular Na increases in energy failure
Na increases in proliferating cancer
Cartilage has high Na
6
Q
Three MRS localisation sequences and how they work?
A
ISIS
PRESS
STEAM
7
Q
Three key components for MRSI pulse sequence?
A
CHESS module
OVS module
CSI module
