We - Lecture fMRI

Question 1

The T1 of heart muscle is 850 ms. What TR gives optimal T1-contrast?

Answer 1

850 ms.

Question 2

True or false: The amount of T1 weighting is determined by the echo time (TE)

Answer 2

False

Question 3

Which of the following items are tissue properties: T1, T2, TR, TE, B0, Diffusion

Answer 3

T1, T2, Diffusion

Question 4

What causes the signal loss on T2-weighted images in microbleeds?

Answer 4

Iron

Question 5

The echo time (TE) determines the amount of T2-weighting. True or false?

Answer 5

True

Question 6

T1 of fat = 250ms
T1 of heart muscle = 850 ms
Fat is bright on a T1-weighted image of the heart because the T1 of fat Is much shorter than the T1 of heart muscle. True or False?

Answer 6

True

Question 7

Select all statements that are true for gadolinium-based intra-vascular contrast agents:
shorten tissue T1
shorten tissue T2
pass the intact BBB
are toxic
emit strong radio waves
are cleared by the kidney

Answer 7

Gadolinium-based intra-vascular contrast: Shorten tissue T1, shorten tissue T2, are cleared by the kidney

Question 8

True or false: Diffusion: the apparent diffusion coefficient (ADC) is higher in white matter than in CSF

Answer 8

False.

Question 9

True or false: Diffusion: the fractional anisotropy (FA) is high in white matter and low in CSF.

Answer 9

True.

Question 10

True or false: CSF is bright on T2.

Answer 10

True.