Review

Question 1

Factors that control production of scatter

Answer 1

• field size- as field size increases, scatter increases
• layer thickness- as layer thickness increases scatter
• kVp- as kVp increases scatter increases

Question 2

Pixel composed of what axes

Answer 2

• X and Y only

* pixels are 2D

Question 3

The Z axis represents

Answer 3

• the slice thickness

* voxels are 3D

Question 4

Houndsfield unit water/air/bone

Answer 4

• water 0
• air -1,000
• bone 1,000

Question 5

As slice thickness increases spatial resolution ________

Answer 5

• decreases

* the thicker the slice the poorer the spacial resolution.

Question 6

Soul-cortef

Answer 6

• corticosteroid

* treats anaphylactoid reactions

Question 7

Non ionic cm include

Answer 7

•iohexol omnipaque

Question 8

Dyspnea

Answer 8

•difficult breathing

Question 9

Ionization chamber

Answer 9

•is a device used to accurately measure radiation exposure

Question 10

ECG cardiac cycle represents

Answer 10

•diastole relaxation of the heart

Question 11

Idixanol

Answer 11

• visipaque

* non-ionic isomolar contrast agent

Question 12

LOCM

Answer 12

•low-osmolar contrast media

Question 13

Iohexol

Answer 13

• omnipaque

* non-ionic low-osmolar contrast media

Question 14

Parenteral

Answer 14

•injection of medication into the body

Question 15

Non stochastic

Answer 15

• threshold

* direct relationship between exposure and the effects

Question 16

Enteric precautions

Answer 16

•protect against the spread of infection with fecal matter

Question 17

Simple cysts of the kidney have average attenuation hounsfield value of

Answer 17

• 0 to +20 hounsfield units

* simple cyst contain water primarily

Question 18

The abdominal aorta bifurcated at the level of

Answer 18

•L4

Question 19

Right lateral decub is a position used to

Answer 19

•differentiate the pancreatic head and duodenum

Question 20

During CT of the head gantry should be angled

Answer 20

•15 degrees above IOML