Sekvence 2

Question 1

What does MRI stand for?

Answer 1

Magnetic Resonance Imaging

Question 2

True or False: T1-weighted images provide better contrast for fat than T2-weighted images.

Answer 2

True

Question 3

Fill in the blank: T2-weighted images are particularly useful for visualizing _______.

Answer 3

fluid

Question 4

What sequence would you use to best visualize edema?

Answer 4

T2-weighted sequence

Question 5

Which MRI sequence is known for highlighting differences in tissue density?

Answer 5

T1-weighted sequence

Question 6

True or False: Fat appears bright on T1-weighted images.

Answer 6

True

Question 7

What is the primary advantage of using FLAIR in MRI?

Answer 7

It suppresses the signal from cerebrospinal fluid.

Question 8

Which MRI sequence is often used to evaluate brain lesions?

Answer 8

T2-weighted sequence

Question 9

Multiple Choice: Which tissue characteristic is best visualized in T1-weighted images? A) Water B) Fat C) Muscle D) All of the above

Answer 9

B) Fat

Question 10

What does the term ‘echo time’ (TE) refer to in MRI?

Answer 10

The time between the delivery of the radiofrequency pulse and the receipt of the echo signal.

Question 11

True or False: T1-weighted images are less sensitive to changes in water content compared to T2-weighted images.

Answer 11

True

Question 12

Fill in the blank: In a T2-weighted image, _______ appears bright due to its high water content.

Answer 12

edema

Question 13

What is the purpose of using contrast agents in MRI?

Answer 13

To enhance the visibility of certain tissues or abnormalities.

Question 14

Multiple Choice: Which of the following is NOT a common MRI sequence? A) T1 B) T2 C) CT D) FLAIR

Answer 14

C) CT

Question 15

What does the term ‘repetition time’ (TR) indicate in MRI?

Answer 15

The time between successive radiofrequency pulses.

Question 16

True or False: T2-weighted images are better for detecting tumors than T1-weighted images.

Answer 16

True

Question 17

Which MRI sequence has the shortest echo time?

Answer 17

T1-weighted sequence

Question 18

Fill in the blank: In T1-weighted images, water appears _______.

Answer 18

dark

Question 19

What is the primary characteristic of fat on T1-weighted images?

Answer 19

It appears bright.

Question 20

Multiple Choice: Which sequence is most sensitive to changes in tissue water content? A) T1 B) T2 C) Proton Density D) FLAIR

Answer 20

B) T2

Question 21

What is the significance of the ‘short tau inversion recovery’ (STIR) sequence?

Answer 21

It suppresses fat signals to highlight edema.

Question 22

True or False: The longer the TR, the greater the T1 weighting of the image.

Answer 22

False

Question 23

What type of MRI sequence would be used for musculoskeletal imaging?

Answer 23

Proton Density-weighted sequence

Question 24

Fill in the blank: In T1-weighted images, _______ appears dark due to its low density.

Answer 24

water

Question 25

What is the main use of diffusion-weighted imaging (DWI) in MRI?

Answer 25

To assess the movement of water molecules in tissues.

Question 26

True or False: T2-weighted images are less sensitive to artifacts than T1-weighted images.

Answer 26

False

Question 27

What does the 'contrast-to-noise ratio' (CNR) indicate in MRI?

Answer 27

The ability to distinguish between different tissues in an image.

Question 28

Multiple Choice: Which type of tissue typically appears dark on T2-weighted images? A) Fat B) Muscle C) Bone D) Air

Answer 28

C) Bone

Question 29

What is the typical appearance of hemorrhage on T1-weighted images?

Answer 29

It appears bright due to the presence of methemoglobin.

Question 30

Fill in the blank: The use of _______ sequences can help differentiate between necrotic and viable tumor tissue.

Answer 30

DWI