structural neuroimaging

Question 1

x-ray

Answer 1

radioluency/radoopacy
- amount of light coming from image
- fat shows up as gray or black
bone shows up as whiter

Question 2

I/C/C of xray

Answer 2

very invasive- radiation absorbed by tissue in head
high clinical use
low cost and high accessibility

Question 3

angiography

Answer 3

inject radio-opaque contrast agent that goes through blood supply and allows us to isolate arteriole system
very invasive, has clinical use, low cost and accessible

Question 4

computerized transaxial tomography

Answer 4

bone- shows up white, gray/white matter- shows up gray
allows you to build 3 dimensions
- representation of tissue density

Question 5

CT scan ICC

Answer 5

very invasive
high clinical use
higher cost than x ray but effective and accessible

Question 6

magnetic resonance imaging

Answer 6

hyper and hypo density
net magnetization produces a reorganization of atoms- protons follow movement of Earth by rotating on axis
system applies radio frequency pulse to distort magnetic field and flip protons
capture change and produce image

Question 7

t1/t2 MRI

Answer 7

t1- useful for volumetric measurement

t2: more useful for detecting lesions

Question 8

flair

Answer 8

fluid attenuated inversion recovery

Question 9

MRI ICC

Answer 9

not invasive unless you add contrast
high clincial and research use
very very expensive but cost effective

Question 10

diffusion tensor imaging

Answer 10

shows the tracts (but not direction or how molecules travel) can use myelination information to see how molecules of water move through tracts