MRI Flashcards
1
Q
Why are the advantages and disadvantages of high Bo machines?
A
Increased susceptibility contrast, greater resolution in spectroscopy, increase in T1
Disadvantages - increased metallic foreign body artefacts, increased chemical shift artifacts, changed t1 contrast
2
Q
Rank all tissues by highest PD to lowest.
A
CSF and fluids, soft tissues, hard tissue, air
3
Q
In what types of pathology is PD Increased and decreased?
A
Increase - Oedema, infection, inflammation, demyelination, acute hearmorrhage, tumors and cysts
Decrease - scars, fibrosis, tumors, capsule and membrane formation, calcification
4
Q
Length of T1 and T2 in types of tissue
A
T1 - long fluid, shorter soft tissue, shortest fat
T2 - fluids long, shorter soft tissue, fat shortest
