Imagine Soft Tissue

Question 1

See also FunMed imaging lecture

Question 2

what can disrupt CT scans? [1]

Answer 2

what can disrupt CT scans? [1]
metal artefacts - creates dark and white streaks. Although now algorithms can make them better.

Question 3

which plane do you normally take CT scan in? [1]

what can CT also be compiled into? [3]

Answer 3

which plane do you normally take CT scan in? [1]
axial (=transverse)

but can be compiled into:
coronal, sagittal & 3D reconstruction

Question 4

CT scans are good for identifying / look at what? [2]

Answer 4

CT scans are good for identifying / look at what? [2]

• *- fractures
• skull injuries**

Question 5

how does MRI scanning create an image? [1]

what is MRI basically measuring content of what molceule in body parts? [1]

Answer 5

how does MRI scanning create an image? [1]
aligns the H protons in an ordered array. normally H+ go in different directions bc the earths natural magnetic field is v low. but when put MRI machine on = 10 - 30 k x earths magnetic field. causes the H+ to align in same direction. measure of how long H+ return to random directions

what is MRI basically measuring content of what molceule in body parts? [1]
water

Question 6

what should not be placed in MRI? [5]

Answer 6

cardiac pacemaker (although not new models)
aneursym clips
metallic foreign bodies
not in early stimulators
surgical clips before 6 weeks of being in this

Question 7

what is difference between T1 & T2 imaging:

• which one shows normal anatomy? pathology?
• what do each show fat [1] & CSF [1] as?
• which one is more sensitive to water content?

Answer 7

what is difference between T1 & T2 imaging?

• which one shows normal anatomy?
  T1 = normal
  T2 = pathology
• what do each show fat as?
• *T1:** fat = white, liquid; CSF = pale grey
• *T2: fat = pale grey , CSF & fluid = white**
• which one is more sensitive to water content?
• *T2 - good 4 oedema**

Question 8

T1 or T2 imaging? [1]

Answer 8

T2: white = oedema

Question 9

T1 or T2 MRI?

Answer 9

T2

Question 10

what type of imaging is this? [1]

what can be seen going on here? [1]

Answer 10

what type of imaging is this? [1]
T1 - bone marrow is seen as white

​what can be seen going on here? [1]
avascular necrosis on right femoral head