# Mock 2.4

15 Questions  Settings  .

Related Topics
• 1.
For the area of the pixel __________.
• A.

Multiply one side by the other side

• B.

Divide one side by the other side

• C.

Add one side to the other side

• D.

Subtract one side from the other side

• 2.
For the area of the pixel, the answer will be in units of __________.
• A.

Mm

• B.

Mm2

• C.

Mm3

• D.

Cm

• 3.
For the voxel volume __________.
• A.

Multiply one side by the other side then multiply that answer by the slice thickness

• B.

Divide one side by the other side by the thickness

• C.

Add one side to the other side + thickness

• D.

Subtract one side from the other side - thickness

• 4.
For the voxel volume, the answer will be in units of __________.
• A.

Mm

• B.

Mm2

• C.

Mm3

• D.

Cm

• 5.
For an isotropic voxel: __________.
• A.

One side should equal the other side should be greater than the slice thickness

• B.

One side should be greater than the other side should equal the slice thickness

• C.

One side should equal the other side should equal the slice thickness

• D.

All sides are different

• 6.
The acquisition time is determined by several imaging parameters including: __________.
• A.

TE, TI & flip angle

• B.

TR, TE, FOV

• C.

Slice thickness and gap

• D.

TR, Matrix, NSA and in some cases # slices and ETL

• 7.
For conventional imaging scan time for a 2D acquisition can be calculated as follows:
• A.

TR x Ny x NSA

• B.

TR x Ny x NSA x # slices (partitions)

• C.

TR x Ny x NSA/ ETL

• D.

TR x NSA x #shots

• 8.
For fast spin echo imaging scan time for a 2D acquisition can be calculated as follows:
• A.

TR x Ny x NSA

• B.

TR x Ny x NSA x # slices (partitions)

• C.

TR x Ny x NSA/ ETL

• D.

TR x NSA x #shots

• 9.
For a 3D, or volume acquisition or a single slice acquisition, scan time can be calculated as follows:
• A.

TR x Ny x NSA

• B.

TR x Ny x NSA x # slices (partitions)

• C.

TR x Ny x NSA/ ETL

• D.

TR x NSA x #shots

• 10.
For an EPI acquisition, scan time can be calculated by:
• A.

TR x Ny x NSA

• B.

TR x Ny x NSA x # slices (partitions)

• C.

TR x Ny x NSA x # slices (partitions)

• D.

TR x NSA x #shots

• 11.
The number of frequency encodings __________ affect the scan time
• A.

Does

• B.

Does not

• C.

Doubles

• D.

None of the above

• 12.
TR is the time between successive __________.
• A.

90° RF pulses

• B.

180° pulses

• C.

360° pulses

• D.

None of the above

• 13.
TR is generally chosen by the amout of __________ desired on the image.
• A.

T1 contrast

• B.

T2 contrast

• C.

T1 contrast or T2 contrast

• D.

None of the above

• 14.
As TR is increased, the image reflects __________.
• A.

More T1 contrast

• B.

Less T1 contrast

• C.

More T2 contrast

• D.

Less T2 contrast

• 15.
For T1 information in the brain at 1.5 T, TR times of __________ are usually desired.
• A.

250 msec-400 msec

• B.

400 msec-500 msec

• C.

1000 msec-15000 msec

• D.

2000 msec-4000 msec