Core

Question 1

The annual occupational whole body dose equivalent limit is?

Answer 1

50mSv

Question 2

Total number of x-ray photons produced at the target is contingent on the…?

Answer 2

Tube Current
Target Material
Square of Kilovoltage

Question 3

Anode Angle will effect..?

Answer 3

Severity of the heel effect
Focal-spot size
Heat-load capacity

Question 4

Early symptoms of anaphlyactic shock

Answer 4

Dysphagia
Itchy palms/soles
Throat constriction

Question 5

When is a grid employed?

Answer 5

Large/dense body part
High kvp

Question 6

Disadvantage of moving grids over stationary?

Answer 6

Can increase Pt dose
Prohibit use of short exposure time

Question 7

What does NOT have an impact on recorded contrast?

Answer 7

Focal Spot size

Question 8

What has an impact on recorded contrast?

Answer 8

Photon energy
Grid ratio
OID

Question 9

Most effective method of sterilization?

Answer 9

Moist heat

Question 10

If the FOV stays the same, what happens as matrix size increases

Answer 10

Increase spatial resolution
Increased Image Quality
Decreased pixel size

Question 11

In digital, as matrix size increases

Answer 11

Decrease pixel size

Question 12

What occurs during Bremsstranlung

Answer 12

An electron approches a +charge, changes direction and loses energy

Question 13

In production of characteristic radiation at the tungsten target, the incident electron…?

Answer 13

Ejects an inner-shell tungsten electron

Question 14

Which blood vessels are best suited for determining pulse rate?

Answer 14

Superficial arteries

Question 15

What device is used to control voltage by varying resistance?

Answer 15

Rheostat

Question 16

What will NOT affect pt. dose

Answer 16

Focal spot size

Question 17

@ what whole body dose will death occur?

Answer 17

60Sv/6000mSv

Question 18

@ what whole body equivalent dose will blood changes bee seen?

Answer 18

0.25 Sv/250 mSv

Question 19

Unit used to measure equivalent dose?

Answer 19

Sievert (sv)

Question 20

Gonad shield should be used when the edge of the radiation field is within how many cm?

Answer 20

5cm

Question 21

Which radiation values will always be an equal dose?

Answer 21

Absorbed and equivalent

Question 22

LD 50/30

Answer 22

3gy

Question 23

Approx. lead equivalent of a primary barrier?

Answer 23

1/16

Question 24

Short term effect are observed within…?

Answer 24

3 months

Question 25

Standard lead equivalency of a lead apron is minimum...?

Answer 25

.5 m

Question 26

All electromagnetic energy moves through space at the same..?

Answer 26

Velocity

Question 27

Which of the following reduces the amount of scatter radiation fog on a radiograph?

Answer 27

decrease KVP Decrease field size

Question 28

Unit for effective dose for occupational workers?

Answer 28

mSv

Question 29

Absorbed dose?

Answer 29

gray (Gy-T)

Question 30

The primary controlling factor for QUANTITY of photons in the x-ray beam is?

Answer 30

kVp

Question 31

The normal pulse rate for an adult?

Answer 31

60-100

Question 32

Which form of digital radiography is there a 2-step process?

Question 33

If the mA is doubled, dose to the pt will...?

Answer 33

Double

Question 34

What can be found on the high voltage side of the xray circuit?

Answer 34

mA selector

Question 35

Quantum mottle is caused by too few photons interacting with the body part, will affect image quality by decreasing ?

Answer 35

Spatial Resolution

Question 36

Which transformer reduces the voltage on the secondary side to provide an appropriate current to heat the filliment?

Answer 36

Step-Down

Question 37

Characteristic Cascade

Answer 37

Incident electron interacts with the k-shell of the atom, knocking it out of orbit, releasing an xray photon

Question 38

Bremsstralung

Answer 38

Incident electron is pulled off of it trajectory by the magnetic charge of the nucleus, the lost energy is converted into an xray photon

Question 39

Photoelcetric Absorption

Answer 39

incident photon interacts with the k-shell of the atom, knocking it out of orbit, releasing an xray photon

Question 40

Coherent/Classical Scatter

Answer 40

Incident photon enters the atom causing it to become excited. A photon is released from the atom with the same energy

Question 41

Compton Scatter

Answer 41

Incident photon interacts with an outter shell electron, knocking it out of orbit, releasing a photon

Question 42

Ethics as defined?

Answer 42

rules that apply values and moral standards to our actions

Question 43

If the mA doubles, the quantity of exposure will...?

Answer 43

Double

Question 44

Which of the secondary interactions is primarily responsible for pt dose?

Answer 44

Photoelectric

Question 45

Death

Answer 45

6000mSv

Question 46

Temporary Sterility

Answer 46

2500mSv

Question 47

Blood changes

Answer 47

250mSv

Question 48

Erythema

Answer 48

2000mSv

Question 49

Nausea/Diarrhea

Answer 49

1500mSv

Question 50

LD 50/30

Answer 50

3000mSv

Question 51

Which factor is used to alter contrast?

Answer 51

kVp

Question 52

What is the usual legal retention for radiographs?

Answer 52

5-7

Question 54

If the distance between the x-ray tube and the IR is cut in half, the exposure to the IR------by a factor of-----

Answer 54

Increases; 4