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Flashcards in MRA imaging Deck (40)
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1

An aortic arch root aneurysm is located:

In the ascending segment of the thoracic aorta

2

The common carotid artery bifurcates into the internal and external carotid artery at the level of the:

: C3-4 disc space

3

In order to acquire an intracranial venogram, a MR angiographic sequence would have a presaturation pulse applied in which location?

Inferior to slice group

4

: In order to acquire an intracranial arterial blood flow sequence , a presaturation pulse would be applied in which location?

Superior to slice group

5

Blood flow velocities are greater:

At the center of a vessel

6

The ___________ supplies blood to the anterior brain

Internal carotid artery

7

The __________ supplies blood to the face.

External carotid artery

8

The ___________ supplies blood to the posterior brain

Vertebro-basilar artery

9

The common carotid artery bifurcates into the internal and external carotid at the level of C5-6.

False

10

In order to acquire an extracranial time-of-flight arterial MRA, a presaturation pulse would be applied in which location to saturate unwanted blood flow?

Superior to slice group, superior to brain stem

11

All of the following arise from the aorta EXCEPT?

Right vertebral artery

12

When utilizing time-of-flight (TOF) MRA to evaluate peripheral vascular flow, such as arterial blood flow in the legs, presaturation pulses are:

Positioned inferior to the slice group

13

An extracranial MRA exam is defined as an MRA of the ____________?

Carotid arteries

14

An intracranial MRA is defined as an MRA of the _______________?

Circle of willis

15

: In time-of-flight (TOF) imaging targeted to the subclavian arteries, the two best imaging planes would be:

Axial and sagittal

16

A major advantage of a 2D time of flight over a 3D time of flight sequence is the ability to:

Image larger areas without saturation of flowing blood

17

A major advantage of a 3D time of flight over a 2D time of flight sequence is the ability to:

Visualize smaller vessels

18

A 2D TOF MRA sequence would be selected to cover

A large area of vascular coverage

19

A disadvantage of TOF MRA is high signal in some background tissues. To minimize signal from background tissues, TE should be selected that enable the signals from fat and water to be:

Out of phase

20

MR angiography uses which kind of pulse sequence?

Gradient echo

21

The degree of stenosis ___________ with time-of-flight MRA.

May be overestimated

22

The __________ of blood is responsible for the bright blood signal in time of flight MR angiography.

Flow

 

23

Phase contrast MRA techniques produce images in which the signal intensity within the vessel is dependent upon the:

Velocity of the flowing blood

24

Contrast enhanced MRA differs from TOF (time of flight) MRA because:

All of the above

25

Which of the following MR angiography techniques has a scan time short enough to complete an abdominal study in a single breath hold?

Contrast enhanced

26

What is the second branch of the abdominal aorta?

Superior mesenteric artery

27

The first major branch of the abdominal aorta is the _______.

Celiac artery

 

28

In a contrast enhanced MR angiography of the abdominal arteries, the IV gadolinium would enhance in which order?

Celiac, superior mesenteric, renal, inferior mesenteric

29

The common iliac veins join to form the:

Inferior vena cava

30

In order to obtain a time of flight MRA of the IVC a presaturation band would be placed:

Superior