Final exams

Question 1

Which of the following studies may be ordered for uncontrollable hypertension?

Answer 1

MRA abdomen (renals)

Question 2

A double IR is a T1 blood-suppressed image resulting in black blood appearance

Answer 2

True

Question 3

Blood flow velocities are greater at the ____ of the vessel:

Answer 3

Center

Question 4

Contrast enhanced MRAs can be acquired with all of the following EXCEPT:

Answer 4

VENC

Question 5

______________ occurs after the R wave is detected.

Answer 5

Trigger Delay

Question 6

Which indicates a contraindication for contrast injection during a renal MRA

• Brest feeding
• renal failure
• GFR below 30
• All of the above

Answer 6

All of the above

Question 7

Phase contrast techniques produce images in which the signal intensity within the vessel is dependent on which of the following factors

• T1 of tissue
• Velocity of blood flow
• FOV
• matrix

Answer 7

velocity of blood flow

Question 8

At standard does, gad has the most apparent effect on__relaxation time and is therefore used as an enhancement agent on ___

Answer 8

T1/T1

Question 9

Which sequence is appropriate for bright blood imaging

• spin echo
• balanced gradient echo
• FLAIR
• STIR

Answer 9

balanced gradient echo

Question 10

Typical spin echo sequences produce images known as ___in cardiac imaging

Answer 10

black(dark) blood imaging

Question 11

What is the minimum TR that would be required for a gated cardiac MRI procedure for a patient that has a heart rate of 80 bpm?

Answer 11

750ms

Question 12

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

Answer 12

B-value

Question 13

a GE-EPI in perfusion imaging is used for?

Answer 13

for speed and to accentuate the T2* effects with a gradient echo

Question 14

What imaging technique uses strong multi-directional gradients, provide models of brain connectivity, and is a standard for white matter disorders?

Answer 14

DTI

Question 15

Due to its sensitivity to venous blood DWI is commonly used in traumatic brain injuries and for high resolution brain venography?
T/F?

Answer 15

False

Question 16

Motion is the number one hurdle technologists face when scanning pediatric patients
T/F?

Answer 16

True

Question 17

When scanning a pt fro seizures the coronal image should be angled with the hypocampus
T/F?

Answer 17

True

Question 18

The Rt and Lt renal arteries lie inferior to the…

Answer 18

Superior mesenteric artery

Question 19

Inferior mesenteric vein empties into the splenic vein

T/F?

Answer 19

True

Question 20

What technique uses a short echo time and flow compensation to make flowing blood much brighter than stationary tissue?

Answer 20

TOF

Question 21

Which plane should be acquired for a MRA runoff study?

Answer 21

Coronal

Question 22

An advantage of non-contrast MRA is the ability to image slow flow often found in pts with vascular diseases?
T/F?

Answer 22

True

Question 23

___is controlled by using a fast breath-hold or respiratory triggered acquisitions

Answer 23

Respiratory motion

Question 24

Typically how many leads are used for gating?

Answer 24

4

Question 25

The mapping of white matter tracts can be accomplished by using strong multi-directional gradients in a technique called?

Answer 25

DTI

Question 26

You should always allow a parent to go into the scan room with the pt. T/F?

Answer 26

False

Question 27

Peripheral pulse gating can be used for heart imaging? | T/F?

Answer 27

False

Question 28

What imaging technique is used to eliminate signal from water?

Answer 28

FLAIR

Question 29

The signal emitted by the voxel of interest in a scan utilizing PRESS is a?

Answer 29

Spin Echo

Question 30

For a MRA runoff study that contrast is being administered what gauge needle should be used?

Answer 30

20-22

Question 31

TOF MRA exams use what parameters to suppress signal in stationary tissue?

Answer 31

- TR | - Flip angle

Question 32

Identify which of the following are a characteristic of any MRA procedure. - Acquire a setoff flow-sensitive base images - suppress the signal from stationary background tissue - generate projection images - enhance the signal from stationary background tissue

Answer 32

- Acquire a setoff flow-sensitive base images - suppress the signal from stationary background tissue - generate projection images

Question 33

A 2C TOF MRA is ordered on a pt with a suspected occluded carotid artery. To reduce the risk of saturating the signal from blood, which is the best slice orientation for the 2D slice?

Answer 33

Axial

Question 34

What pulse sequence is used to detect strokes?

Answer 34

DWI

Question 35

Phase contrast angiography depends on___to generate the base images - inflow enhancement - flow voids - none of the above - phase effects of flow

Answer 35

Phase effects of flow

Question 36

Peristalsis can cause artifacts in the pelvis? | T/F?

Answer 36

True

Question 37

What sequence should be used in perfusion imaging when the transient change in T2* is measured?

Answer 37

GE-EPI perhaps with echo shifting where the TE is longer than the TR

Question 38

The parameter b factor is measured how?

Answer 38

s/mm^2

Question 39

A TOF MRA sequence uses a short echo time | T/F?

Answer 39

True

Question 40

In the pelvis the descending aorta branches into the common iliac arteries? T/F?

Answer 40

True

Question 41

Which artifact is caused by the underestimation of maximum blood velocity in the image? - Maxwell - turbulent flow - acceleration - phase wrap

Answer 41

Phase wrap

Question 42

What is the best plane to use to visualize the aortic arch?

Answer 42

sagittal

Question 43

A tear or rip in the vessel is known as:

Answer 43

Dissection

Question 44

A MRV of the extremities would be appropriate to diagnose: - AVM - Necrosis - Thrombosis - severity of osteomylitis

Answer 44

Thrombosis