MRI

Question 1

different sequences of basic whole brain scan

Answer 1

short axis
- axial T2 FSE/TSE
- axial FLAIR
- axial DWI
- axial T2 GRE
- axial T1 SE

long axis
- sagittal/coronal T1

Question 2

additional sequences for brain scan

Answer 2

3D TOF MRA
3D phase contrast venography

Question 3

for axial/transverse scan, slices should be parallel to

Answer 3

anterior commissure-posterior commissure line

Question 4

what is the coverage for axial scan of the brain

Answer 4

vertex to foramen magnum

Question 5

what is T2 weighted TSE/FSE useful for

Answer 5

appearance is the same as T2 weighted RF pulse sequence, except that this is a faster method

for pathology on white matter diseases
- white matter appears dark
- any bright appearance on white matter diseases will be obvious on T2 weighted image

Question 6

what is T2 FLAIR useful for

Answer 6

heavily T2 weighted
sensitive to pathology
shows periventricular diseases
“fluid attenuated” - unbound water suppressed
to identify if there is any tumour near the ventricles that were masked in the T2 weighted TSE/FSE sequence

Question 7

what is T1 weighted SE used for

Answer 7

for anatomy
- pre and post contrast (no contrast in T2W)
- age of bleed

Question 8

coverage of TOF MRA

Answer 8

foramen magnum to above corpus callosum

Question 9

what is PC venography used for

Answer 9

to see venous system in brain

Question 10

scan range for nasopharyngeal

Answer 10

sagittal plane
head condition: small FOV frontal sinus to hyoid
head and neck conditions: large FOV frontal sinus to sternal notch

axial plane
nose tip to mastoid air cells