Unit 3 Quiz

Question 1

What is the primary purpose of a 180-degree pulse in a Spin Echo sequence?

Answer 1

Refocus (rephrase) magnetization

Question 2

In a typical Spin Echo sequence, the echo is formed by:

Answer 2

180-degree pulse

Question 3

The time between the initial 90-degree pulse and the center of the echo is known as:

Answer 3

Echo time (TE)

Question 4

What parameter is adjusted to control the T2 weighting in a Spin Echo sequence?

Answer 4

Echo time (TE)

Question 5

The formation of multiple echoes in a Spin Echo sequence is known as:

Answer 5

Fast Spin Echo/Turbo Spin Echo

Question 6

Fat remains bright on T2 weighted images due to the multiple RF pulses which reduce the effects of spin-spin interactions in fat & this is known as:

Answer 6

J coupling

Question 7

Pulse sequences enable us to control the way in which the system applies pulses & gradients. In this way, image ________ & ______ are determined

Answer 7

Weighting & quality

Question 8

Another modification to Single shot fast spin echo is a reverse flip angle excitation pulse which is applied at the end of the echo train. This is called?

Answer 8

DRIVE

Question 9

___________ is an extremely important sequence in musculoskeletal imaging.

Answer 9

STIR

Question 10

____________ is used in brain & spine imaging to see Periventricular & cord lesions more clearly.

Answer 10

FLAIR