Board Mri

What technique can be used to increase contrast enhancement?

MTC
MTT
MRC
MRS

Which tissues will appear Hypointense using the combination of the following parameters?
Spin Echo
TR: 500 ms
TE: 10 ms
FA:90

Cerebrospinal fluid
Air inside the maxillary sinuses
Flowing blood in the internal carotid artery
All answers are correct

What would be the image weighted resulting from the following parameters?
TR 4000 ms PES 192 Slice 20
TE 25 ms FES 256 ETL 6
FA 90 NEX 2 RBW 21 mHz

T1
T2
PD
T2*

In SE pulse sequence which parameter combination will produce a the heaviest PD weighted image?

500 TR, 20 TE, 90 Flip Angle
2500 TR, 20 TE, 90 Flip Angle
30000 TR, 100 TE, 90 Flip Angle
2500 TR, 10 TE, 90 Flip Angle

MRI images that are based on differences in the transverse relaxation characteristics of tissues are known as _________.

T1WI
T2WI
PDWI
DWI

Interstitial edema is the abnormal accumulation of fluid in areas resulting from pathologic process or trauma. What image weighted would be the best to show this interstitial edema?

T2
Short TR
Long TR
Short TE
Long TE

Which of the following tissues will have the strongest signal intensity in a T2 weighted image?
Bone marrow
Tendon
Liver
Kidney

Longitudinal relaxation occurs more efficiently in which type of tissue?

Cortical bone
Muscle
Water
Yellow bone marrow

On a T1 weighted image, edema appears dark because it has a __________ relaxation time.

Short T1
Short T2
Long T1
Long T2

TR:

Is the time between each excitation pulse
Is the repetition time
Controls the amount of T1 recovery that is allowed to occur
All answers are correct

Tissues with short relaxation times have:

Higher relaxation rates.
Lower relaxation rates
High T2 value.
High T1 value

Tissues with short T1 relaxation time will appear__________ on T1 weighted images.

Dark
Bright
Isointense
None of the above

Tissues with a high inherent energy have a _______ T1 relaxation time.

Long
Short
The inherent energy does not affect the T1 relaxation of the tissues.

To maximize differences in T2 relaxation the best parameter selection will be:

Short TR
Long TR
Short TE
Long TE

What is the relaxation curve that decrease in value with time?

T1
T2
PD
T1 IR

)A complicated equation for predicting the MR signal intensity from a tissue subject to a spin-echo sequence is the:

Larmor equation
Bloch equation
Purcell equation
Lauterbur equation

)In order to maximize T1 differences in GRE pulse sequences the best flip angle will be?

20
50
90
180

Which parameter combination will result in the heaviest T2*?

Short TR Short TE Short flip angle
Long TR Long TE Long flip angle
Short TR Short TE Long flip angle
Long TR Long TE Short flip angle

Which of the following extrinsic contrast parameters is/are responsible for manipulating the T1 on a GRE image?

TE
Flip angle/TR
T1 relaxation
TR
T2 relaxation

Which of the following extrinsic contrast parameters is/are responsible for manipulating the T1 on a GRE image?

TE
Flip angle/TR
T1 relaxation
TR
T2 relaxation

In a T2 weighted image, tissues with short T2 relaxation times appear how?

Hyperintense
Hypointense
Isointense
None of the above

Which parameter combination will result in the heaviest T2*?

Short TR Short TE Short flip angle

Long TR Long TE Long flip angle

Short TR Short TE Long flip angle

Long TR Long TE Short flip angle

Which of the following contrast mechanisms will contribute to image weighting?

T1 recovery
T2 decay
Proton density
All of the above

What selection will be the best in order to minimize T2 effects in a PD weighted image?

Long TR
Long TE
Short TR
Short TE

In a T2 weighted image, a long TR is used to do what?

Maximize T1 effects
Minimize T1 effects
Minimize T2 effects
Maximize T2 effects

The image contrast obtained in a Proton Density (PD) weighted image depends on:

T1 relaxation time of the tissues
T2 relaxation times of the tissues
Amount of protons in the tissues

In the atom: What particle is found outside the nucleus?

Protons
Electrons
Neutrons

Neutrons and protons are related to the atom ________ number.

B) Mass
C) Isotopic
A) Atomic

The spinning of the hydrogen nucleus is the result of the spinning of the:

Electron
Neutron
Proton
Water

Ionizing radiation can potentially damage the

A) A) RNA
B) NAA
C) DNA
D) Cho