Chapter 12

Question 1

What signal intensity is an area of abnormality likely to have on a trace image

Answer 1

Hyperintense

Question 2

Chemical shift is measured in which of the following units?

Answer 2

ppm

Question 3

Functional imaging techniques allow MRI to be used to assess function and physiology as opposed to merely conventional structural imaging. (T or F)

Answer 3

true

Question 4

T2 shine through occurs when lesions or areas with a very long T1 decay time remain bright on the DW or trace image. (T or F)

Answer 4

false
T2 shine through occurs when lesions or areas with a very long <strong>T2</strong> decay time remain bright on the DW or trace image

Question 5

What signal intensity is an area of abnormality likely to have on an ADC map?

Answer 5

Hypointense

Question 6

What term is used to describe the net displacement of diffusion spins across a tissue?

Answer 6

ADC

Question 7

The anatomy of white matter tracts can be mapped using strong multi-directional gradients in which of the following?

Answer 7

diffusion tensor imaging (DTI)

Question 8

MR microscopy (MRM) is useful as a research tool when studying detail in a very small area of tissue. (T or F)

Answer 8

True

Question 9

Perfusion is measured using MRI by tagging the fat in arterial blood during image acquisition (T or F)

Answer 9

False

Perfusion is measured using MRI by tagging the WATER in arterial blood during image acquisition.

Question 10

What is the extrinsic parameter that controls the amount of diffusion seen in an image?

Answer 10

b factor

Question 11

What does BOLD stand for?

Answer 11

Blood oxygenation level dependent

Question 12

Perfusion is the regional blood flow in tissues and is defined as the volume of blood that flows into one gram of tissue (T or F)

Answer 12

True

Question 13

Functional imaging techniques include

Answer 13

Perfusion imaging
DWI
Spectroscopy

Question 14

Which of the following best describes a use for MR Spectroscopy (MRS)?

Answer 14

To aid in brain tumor staging

Question 15

Interventional MRI includes performing biopsies in the MR suite. (T or F)

Answer 15

True

Question 16

Which type of technique is useful in stroke and tumor staging and may have use in understanding depression, epilepsy and schizophrenia?

Answer 16

MR Spectroscopy

Question 17

TRUE or FALSE: Interventional MRI is very expensive, as all surgical, anesthetic and monitoring equipment must be nonferrous and MRI-safe.

Answer 17

True

Question 18

What are typical b-values?

Answer 18

500 s/mm^2 - 1500 s/mm^2

Question 19

TRUE or FALSE: I should be able to recognize a picture of a DWI vs a pic of an ADC and know how restricted diffusion looks on both.

Answer 19

True

Question 20

occurs when lesions with very long T2 decay time remain bright on the DWI or trace image.

Answer 20

T2 shine through

Question 21

Which are considered functional imaging techniques

Answer 21

whole body imaging
 spectroscopy
MR microscopy
 perfusion imaging
diffusion weighted imaging

Question 22

Which value controls the amount of diffusion seen on the image?

Answer 22

B-value

Question 23

ablation

Answer 23

uses heat

Question 24

cryotherapy

Answer 24

uses extreme cold