ARMRIT

Question 1

Rotator cuff muscles

Answer 1

supraspinatous, infraspinatus, teres minor, subscapularis,

Question 2

Most commonly torn muscle of the four muscles that make up the rotator cuff

Answer 2

supraspinatuss

Question 3

best scan plane to encode coronal obique

Answer 3

YX

Question 4

what nerve is associated with carpal tunnel

Answer 4

median

Question 5

best plane to view median nerve

Answer 5

axial

Question 6

optimal plane for carpal bones and interosseous ligaments

Answer 6

coronal plane

Question 7

kienbocks

Answer 7

osteomalacia of the lunate bone in the wrist, avascular necrosis of the lunate

Question 8

TFCC

Answer 8

Triangular fibrocartilage complex is of the wrist, optimal plane is coronal

Question 9

Collateral ligaments of the Knee

Answer 9

Would best be visualized w/coronal plane to evaluate ACL tear.

Question 10

Degree rotation to evaluate torn ACL

Answer 10

15 degree external roation

Question 11

Cruciate Ligaments

Answer 11

best visualized with saggital orientaion

Question 12

Avascular necrosis

Answer 12

is often found in the femoral head, use small FOV to evaluate best

Question 13

achilles tendon

Answer 13

is the thickest and strongest tendon in the body, best viewed and evaluated in the saggital plane

Question 14

Assuming all other parameters are the same a TE of ____ ms provides the best SNR

Answer 14

15

Question 15

Decreasing pixle size does what to SNR

Answer 15

Decreases

Question 16

what formula is used to calculate the size of a pixle

Answer 16

FOV /Matrix

Question 17

If a sequence with a matrix of 256x512 is adjusted to 512x512 what happens to the SNR and Scan Time

Answer 17

SNR will decrease and the Scan Time will increase

Question 18

With regards to K space, data containing high resolution is located along the

Answer 18

Outer Lines

Question 19

Assuming all other parameters are the same a ______ ms TR provides the best SNR

Answer 19

800, the longer the TR the better the SNR

Question 20

With a rectangular FOV how do you yield square pixels

Answer 20

phase stephs must be half the number of frequency steps

Question 21

High amp signals are stored in

Answer 21

the center of K space

Question 22

a method of reducing scan time by not filling as many lines of K space in the phase direction, while maintaining spatial resolution is known as

Answer 22

Rectangular FOV

Question 23

The overall SNR will increase in 3D volume imaging when there is an increase in

Answer 23

either FOV an/or increase in # of slices or partitions (chunks)

Question 24

If the Nex goes from 2 to 6 the SNR would increase by

Answer 24

1.7
SNR increases by the square root of the % increase…..2 to 6 is 3 times as much NEX. so the square root of 3 is 1.7

Question 25

____ is whenonly half the views of k space are filled in the frequency axis.

Answer 25

partial or fractional echo

Question 26

3D scan time formula

Answer 26

TR x Phase Matrix x NEX x # of slices

Question 27

what brain tissue has the shortest T1 relaxation time

Answer 27

white matter