Test 2

Question 1

What is the film emulsion made of?

Answer 1

Silver halide crystals suspended in gelatin.

Question 2

The purpose of using intensifying screens is to:

Answer 2

Reduce Patient Exposure

Question 3

What are intensifying screens made of?

Answer 3

Rare earth crystals

Question 4

You had a 200 speed film-screen system. The technique chart that is posted works well for the system. You purchase a new 600 speed film-screen imaging system. What will you need to do to all of mAs values on the existing technique chart?

Answer 4

Use 1/3 mAs

Question 5

As film screen system speed increases, sharpness of detail:

Answer 5

Decreases

Question 6

Which of these system speeds would you use for detailed extremity images?

Answer 6

100 Speed

Question 7

Which of these would you choose if you specialize in pediatrics?

Answer 7

1200 Speed

Question 8

Which of these would be the minimum speed used for spine imaging?

Answer 8

400 Speed

Question 9

What is film latitude?

Answer 9

Range of error

Question 10

How is film contrast related to film latitude?

Answer 10

Inversely

Question 11

What type of safelight is safe for rare earth screen film combinations?

Answer 11

GBX

Question 12

Safelight bulbs should be _____ or less.

Answer 12

15 Watts

Question 13

Safelights should be placed at least _____ from the work surface in the darkroom.

Answer 13

4 Feet

Question 14

Film should be stored at _____ relative humidity.

Answer 14

40-60%

Question 15

Dirty screens cause these artifacts:

Answer 15

Sharp white dots

Question 16

This should be used to clean intensifying screens:

Answer 16

Screen cleaner and gauze

Question 17

Define LATENT image:

Answer 17

The invisible image on the film prior to processing.

Question 18

What would happen if you use film that is out of date?

Answer 18

Fog

Question 19

What is the function of fixer?

Answer 19

To clear and harden the emulsion

Question 20

Why does the direction of film transport through the processor matter?

Answer 20

Chemical replenishment

Question 21

What would the image look like it … processed with oxidized developer?

Answer 21

Too Light

Question 22

how would the image look if the developer was too hot?

Answer 22

Too Dark

Question 23

What is the function of developer?

Answer 23

To convert the latent into a manifest image.

Question 24

What is the film BASE made of?

Answer 24

Polyester Plastic (mylar)

Question 25

State the unit of absorbed dose in classical nomenclature:

Answer 25

RAD

Question 26

State the unit absorbed dose in Systems International nomenclature.

Answer 26

Gray

Question 27

100 RAD = ______ Gray

Answer 27

1

Question 28

State the unit for occupational exposure in classical nomenclature.

Answer 28

REM

Question 29

REM = RAD x ____

Answer 29

QF

Question 30

What is the QF?

Answer 30

Quality Factor

Question 31

What is the QF of x-ray?

Answer 31

1

Question 32

In x-ray ____ R= _____ RAD= _____ REM

Answer 32

1-1-1

Question 33

20 mRAD of x-ray exposure = ______ mREM

Answer 33

20

Question 34

____ mREM = 1 REM

Answer 34

1000

Question 35

_______ mREM = 1 REM

Answer 35

1,000

Question 36

20 RAD of Alpha exposure = ____ REM

Answer 36

400

Question 37

State the unit for occupational exposure in Systems International nomenclature.

Answer 37

Sievert

Question 38

10 REM = ____ Sievert

Answer 38

1

Question 39

Comparing annual radiation exposure to the population in the U.S., most exposure comes from this source:

Answer 39

Background: cosmis, terrestrial

Question 40

This x-ray interaction with matter produces the whites in the image.

Answer 40

Photoelectric absorption

Question 41

This x-ray interaction causes "fog" in an image.

Answer 41

Compton Scatter

Question 42

This x-ray interaction occurs high kVp in the diagnostic range:

Answer 42

Compton Scatter (60-125 kVp)

Question 43

This x-ray interaction decreases image contrast:

Answer 43

Compton Scatter

Question 44

State the optimum range of kVp for spine imaging:

Answer 44

70-90 kVp

Question 45

State the range of optimum kVp for extremity imaging:

Answer 45

50-60 kVp

Question 46

Which of these will exhibit the least shape distortion?

Answer 46

PA lumbar spine

Question 47

Which of these will exhibit the least size distortion?

Answer 47

AP Lumbar spine

Question 48

When collimating from a 14x17 area to a 10x12 area:

Answer 48

Increase mAs 50%

Question 49

An AP lumbar spine exam is properly exposed using 40 mAs, 73 kVp on a 14x17 film. If an 4x4 spot view of L-1 is required, what should the new exposure factors be?

Answer 49

60 mAs, 73 kVp

Question 50

An image with no OID requires 20 mAs, what should the mAs be if there is a 6" OID?

Answer 50

30 mAs