MRA

Question 1

An aortic arch root aneurysm is located

Answer 1

In the ascending segment of the thoracic aorta

Question 2

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

Answer 2

C3-C4 disc spac

Question 3

In order to acquire an intracranial venogram, an MR angiographic sequence would have a pre-saturation pulse applied in which location

Answer 3

Inferior to slice group.

(In order to null signal from intracranial arterial blood flow)

Question 4

In order to acquire an intracranial arterial blood flow sequence, a pre-saturation pulse would be applied in which location

Answer 4

Superior to slice group

In order to null signal from intracranial venous blood flow

Question 5

Blood flow velocities are greater

Answer 5

At the center of a vessel

Question 6

The ________ supplies blood to the anterior brain

Answer 6

ICA

Question 7

The ________ supplies blood to the face

Answer 7

ECA

Question 8

The _________ supplies blood to the posterior brain

Answer 8

Vertebro-basilar artery

Question 9

In order to acquire an extra cranial time of flight Arterial MRA, a pre-saturation pulse would be applied in which location to saturate unwanted blood flow

Answer 9

Superior to slice group, superior to brainstem

Question 10

When utilizing time of flight MRA to evaluate peripheral vascular flow, such as arterial blood flow in the legs, pre-saturation pulses are

Answer 10

Positioned inferior to the slice group

Question 11

An extra cranial MRA exam is defined as an MRA of the

Answer 11

Carotid arteries

Question 12

And intracranial MRA is defined as an MRA of the

Answer 12

Circle of Willis

Question 13

In time of flight imaging targeted to the subclavian artery’s, the two best imaging planes would be

Answer 13

Axial and sagittal

Both planes are perpendicular to the vessels of interest

Question 14

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

Answer 14

Image larger areas without saturation of flowing blood

Question 15

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

Answer 15

Visualize smaller vessels

Question 16

A 2D TOF MRA sequence would be selected to cover ______

Answer 16

A large area of vascular coverage

Question 17

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

Answer 17

Out of phase

Question 18

MRA uses which kind of pulse sequence

Answer 18

Gradient echo

Question 19

The degree of stenosis ________ with time of flight MRA

Answer 19

May be overestimated

Question 20

The ___________ of blood is responsible for the bright blood signal in TOF MRA

Answer 20

Flow

Question 21

Phase contrast MRA technique’s produce images in which the signal intensity within the vessel is dependent upon the

Answer 21

Velocity of the flowing blood

Question 22

Which MRA technique has a scan time short enough to complete an abdominal study in a single breath hold

Answer 22

Contrast enhanced

Question 23

What is the second branch of the abdominal aorta

Answer 23

Superior mesenteric artery

Question 24

The first major branch of the abdominal aorta is the

Answer 24

Celiac artery

Question 25

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

Answer 25

Celiac, superior mesenteric, renal, inferior mesenteric

Question 26

The common iliac vein’s join to form the

Answer 26

IVC

Question 27

To obtain a TOF MRA of the IVC a pre-saturation band would be placed

Answer 27

Superior

Question 28

To create a projection image in MRA the technique most commonly used is

Answer 28

MIP

Question 29

The major Bifurcation of the abdominal aorta is the

Answer 29

Right and left iliac arteries

Question 30

The vertebral arteries originate from the

Answer 30

Right and left subclavian artery‘s

Question 31

The optimal technique to visualize the circle of Willis would be

Answer 31

3DTOF

Question 32

When imaging a geriatric patient, while performing a PCA MRA sequence, what imaging parameter might the operator adjust

Answer 32

VENC

Question 33

Flow before an area of stenosis is defined as

Answer 33

Laminar flow

Question 34

In TOF imaging, areas of signal void can be seen on the image due to

Answer 34

Turbulent flow and Vortex flow

Question 35

A disease that is characterized by narrowing of the aorta is called an

Answer 35

Aortic coarctation

Question 36

The MRA technique that relies on velocity induced phase shifts to distinguish between moving and stationary protons is

Answer 36

Phase contrast