Quiz MRI Flashcards
True or false:
This is a T2-weighted image.
Hint: the T1 and T2 of CSF are very long
True
The T1 of heart muscle is 850 ms. What TR gives optimal T1-contrast?
- 8.5 ms
- 85 ms
- 850 ms
- 8500 ms
- 850 ms
True or false:
The amount of T1 weighting is determined by the echo time (TE).
False
Which of the following items are tissue properties?
- T1
- T2
- TR
- TE
- B0
- diffusion
- T1
- T2
- Diffusion
What causes the signal loss on T2-weighted images in microbleeds?
- Short T1
- Long T1
- Iron
- Diffusion
- CSF
- Iron
True or false.
The echo time (TE) determines the amount of T2-weighting.
True
True or false.
T1 of fat = 250 ms
T1 of heart muscle = 850 ms
Fat is bright on the T1-weighted image of the heart because the T1 of fat is much shorter than the T1 of heart muscle.
True
This MR image was scanned after injection of a gadolinium-based intravascular contrast agent. Select all statements that are true for this image.
- This image is T1-weighted.
- This image is T2-weighted.
- It was scanned with short TR.
- It was scanned with short TE.
- This image is T1-weighted.
- It was scanned with short TR.
- It was scanned with short TE.
Select all statements that are true for gadolinium-based intra-vascular contrast agents.
- Shorten tissue T1
- Shorten tissue T2
- Pass the intact blood-brain barrier
- Are toxic
- Emit strong radiowaves
- Are cleared by the kidneys
- Shorten tissue T1
- Shorten tissue T2
- Are cleared by the kidneys
True or false:
Diffusion: the apparant diffusion coefficient (ADC) is higher in white matter than in CSF.
False
True or false:
Diffusion: the fractional anisotropy (FA) is high in white matter and low in CSF.
True
