Quiz 1

Question 0

The electricity applied to the tube during X-ray production is controlled at the:

Answer 0

Control Panel

Question 1

The device that restricts the X-Ray beam is the:

Answer 1

Collimator

Question 2

Density on the film screen image is due to small deposits of ___________ in the processed film.

Answer 2

black metallic silver

Question 3

A film that is too light has:

Answer 3

too little intensity

Question 4

A film with too much density: (3 factors)

Answer 4

was exposed to too much light or radiation

has too much black metallic silver

will not make the anatomy visible

Question 5

If it is decided that there is too much density on an image and that it must be repeated, decisions about how to correct the problem are made by the:

Answer 5

Radiographer

Question 6

Increasing exposure intensity results in

Answer 6

More black metallic silver

Question 7

Having less black metallic silver present in the image results in:

Answer 7

less radiographic density

lower optical density

Question 8

Increasing in energy of the photon an x-ray beam results in an image with:

Answer 8

increased optical density

Question 9

With film-screen imaging the optical densities:

Answer 9

cannot be altered after processing

Question 10

Appropriate radiographic densities:

Answer 10

allow visibility of anatomic structures

Question 11

Which of the following is not a primary exposure technique factor:

Answer 11

SID

Question 12

What type of relationship do mAs have with the quantity of x-rays produced

Answer 12

Direct proportional

Question 13

Given 40 mAs doubling the mA produces the same result as: (2)

Answer 13

doubling the time of exposure

doubling the mAs

Question 14

In maintaining the same mAs there is an _________ relationship between mA and exposure time.

Answer 14

Inverse

Question 15

For film-screening imaging increasing the mAs results in:

Answer 15

Increased density

Question 16

Which of the following has an effect on how much mAs is used for a specific examination? (3 factors)

Answer 16

Generator type
Pathologic conditions present
Type of image receptor

Question 17

The controlling factor for density when using a film screen image receptor is:

Answer 17

mAs

Question 18

If a film image appears dark, to produce a diagnostic image you may decide to:

Answer 18

decrease mAs

Question 19

Generally, if a film image is dark the mAs should be:

Answer 19

Halved

Question 20

If a film image has to be repeated because it it too dark or too light, the mAs must be changed by a factor of at least:

Answer 20

2

Question 21

With digital imaging, if the mAs is too high:

Answer 21

The image brightness will appear appropriate

Question 22

With digital imaging, the relationship between mAs and image brightness is NOT: (3) Rather it has no __________.

Answer 22

Direct
Directly proportional
Inverse

Relationship

Question 23

Increasing kVp: (3)

Answer 23

increases the energy of the x-ray photons

increases the quantity of x-ray photons

increases the penetrating power of x-ray photons

Question 24

When kVp is increases, exposure to the image receptor is increased with what kinds of imaging: (2)

Answer 24

film-screen imaging | digital imaging

Question 25

What type of relationship does kVp* have with the density of a film image?

Answer 25

Direct but no proportional

Question 26

With digital imaging, if the kVp is too high:

Answer 26

the image brightness appears appropriate

Question 27

Standard radiographic x-ray tubes have small focal spots that measure approximately:

Answer 27

0.5-0.6 mm

Question 28

Standard radiographic x-ray tubes have large focal spots that measure approximately:

Answer 28

1-1.2 mm

Question 29

Focal spot size is determined by:

Answer 29

Cathode filament size

Question 30

Focal spot size affects only:

Answer 30

Recorded detail

Question 31

The inverse square law describes the relationship between ______ and ______.

Answer 31

Distance and beam intensity

Question 32

What type of relationship does distance have with x-ray beam intensity?

Answer 32

Inversely Proportional

Question 33

Which of the following is the correct formula for the inverse square law?

Answer 33

I1/I2 = D2^2/D1^2

Question 34

When the distance is increased from 72 inches SID to 40 inches SID, the radiation reaching the the measuring device:

Answer 34

Increases

Question 35

To maintain the same exposure to the IR, if the SID is increased, the mAs must be:

Answer 35

Increased

Question 36

Which of the following is the correct formula for the mAs/ distance compensation formula?

Answer 36

mAs 1/mAs 2 = (SID 1)^2 / (SID 2)^2 Direct Square Law

Question 37

What type of relationship does mAs have with SID when the goal is to keep the exposure to the IR constant?

Answer 37

Direct proportional

Question 38

When the SID is decreased from 72 inches SID to 40 inches SID, the radiation reaching the IR ________, requiring a __________ in mAs to compensate.

Answer 38

Increase, decrease

Question 39

When the SID is increased from 36 inches SID to 72 inches SID, the mAs must be ________ to maintain exposure to the IR.

Answer 39

Increased

Question 40

The distance between the object being imaged and the image receptor is the:

Answer 40

OID

Question 41

The distance between the X-ray focal spot and the image receptor is the:

Answer 41

SID

Question 42

The distance between the x-ray focal spot and the object being image is the:

Answer 42

SOD

Question 43

Which of the following factors PRIMARILY controls radiographic density?

Answer 43

mAs

Question 44

The negative side of the x-ray tube holds the________.

Answer 44

filament

Question 45

Thermionic emission at the filament creates a ________.

Answer 45

space charge

Question 46

A dual focus tube has two:

Answer 46

filaments

Question 47

mA is the measure of _________ that flows from cathode to anode.

Answer 47

tube current

Question 48

What type of tube was Roentgen working with in his lab when x-rays were discovered?

Answer 48

Crookes Tube

Question 49

X-Rays carry a negative charge that causes ionization, true or false:

Answer 49

False

Question 50

X-ray photons travel at the speed of light in a vacuum, true or false:

Answer 50

True

Question 51

When the x-ray photon travels completely through the part, this activity is called:

Answer 51

Transmisson

Question 52

The x-ray beam that leaves the patient in the direction of the image receptor is often referred to as:

Answer 52

Exit radiation

Question 53

Unwanted density on the radiograph due to scatter radiation is called:

Answer 53

Fog

Question 54

________ is the boiling off of electrons from the filament when current is applied.

Answer 54

Thermionic emission

Question 55

Density is a _______ property of the radiographic image.

Answer 55

Photographic

Question 56

Considering the primary controller of radiographic density, which film has the greatest density:

Answer 56

Anything with the highest mAs* | 100 mA 1 Second

Question 57

Considering the primary controller of radiographic density, which film has the greatest density?

Answer 57

Anything with the highest mAs* | 400 mA 2 Seconds

Question 58

If mAs was fixed which kvP would produce the greatest density?

Answer 58

Anything that has the highest kvp* | 100 kVp

Question 59

For a given exposure technique, increasing part thickness decreases radiographic density, true or false?

Answer 59

True

Question 60

The SOD can be found by:

Answer 60

SID-OID subtracting OID from the SID*

Question 61

Ionization radiation is capable of removing ________ from atoms as it passes through the matter.

Answer 61

Electrons

Question 62

If mAs is increased from 20 mAs to 40 mAs the patient dose will be:

Answer 62

doubled

Question 63

Beam penetrability is increased if ______ is/are increased.

Answer 63

kVp

Question 64

Which technique would give the highest patient dose?

Answer 64

Anything with a higher kVp and mAs* 65 kVp/300 mA @ 0.1 sec

Question 65

An electron cloud surrounding a hot cathode tube is referred to as a:

Answer 65

Space Charge

Question 66

An x-ray exposure is made using the following factors: 200 mA, .04 second, 80 kVp, and 40 inches SID. In this case, which represents the value of the mAs?

Answer 66

8

Question 67

The purpose of rotating the x-ray tube target is to:

Answer 67

increase the heat capacity of the anode.

Question 68

A doubling of the mA with no charge in exposure time will result in: (4)

Answer 68

increased anode heat twice as much patient dose increased radiographic density twice as many photons in the x-ray beam

Question 69

A device used to control the size of the radiation field is a:

Answer 69

Collimator

Question 70

All radiographs must be identified with which of the of the following? 1. radiographer's name 2. patients name or id number 3. right or left marker

Answer 70

2 and 3

Question 71

The diagnostic range of x-ray energy is:

Answer 71

30 kVp-150 kVp

Question 72

The _______ is the source of radiation in the x-ray tube.

Answer 72

focal spot

Question 73

Projectile electrons travel from:

Answer 73

Cathode to Anode

Question 74

Exposure (R) refers to radiation intensity in _________.

Answer 74

Air

Question 75

The best way for technologists to reduce occupational exposure is to follow the principles of: (3)

Answer 75

ALARA time and distance shielding

Question 76

(M) How much mAs is produced when the mA is 200 and the exposure time is 0.5 sec?

Answer 76

100 mAs mAs= mA x Sec

Question 78

(M) How much mAs is produced when the mA is 800 and the exposure time is 30 ms?

Answer 78

24 mAs

Question 80

(M) If the mA is 600 and the exposure time is 10 ms, how can the mAs be doubled? (3)

Answer 80

Increase mA to 1200 Increase the time to 20 ms increase the mAs to 24 mAs

Question 82

(M) Which of the following exposure factors produces 20 mAs?

Answer 82

200 mA @ 100 ms

Question 83

(M) What mA should be selected to produce 32 mAs using a 0.04 exposure time?

Answer 83

800 mA

Question 84

(M) 200 mA @ 80 ms produces 16 mAs. Which of the following exposure factors maintains 16 mAs while using a shorter exposure time?

Answer 84

400 mA @ 0.04 sec

Question 86

(M) If the intensity of radiation at 36 inches is 480 mR, what is the intensity if the SID is increased to 72 inches.

Answer 86

120 mR

Question 88

(M) If the intensity of radiation at 36 inches SID is 600 mR, what is the intensity if the distance is increased to 60 inches SID.

Answer 88

215.8 mR

Question 89

(M) If 12 mAs produces appropriate film density at 36 inches SID, how much mAs is needed at 72 inches SID to maintain that amount of film density?

Answer 89

48 mAs

Question 89

(M) If 32 mAs produce appropriate film density 72 inches SID, how much mAs is needed at 36 inches SID to maintain that amount of film density?

Answer 89

8 mAs

Question 89

(M) If 16 mAs produce appropriate film density at 72 inches SID, how much mAs is needed at 48 inches SID to maintain that amount of film density?

Answer 89

7 mAs

Question 89

(M) If 10 mAs produces appropriate film density at 40 inches SID, how much mAs is needed at 48 inches SID to maintain that amount of film density?

Answer 89

14 mAs

Question 89

(M) If a person stands 3 feet from the source of exposure, receives an exposure of 16 R/ min, and then moves to 6 feet from the source of exposure, what would be the new exposure rate according to the inverse square law?

Answer 89

4 R/min

Question 89

(M) If a person stands 12 feet from the source of exposure, receives an exposure of 16 R/min, and then moves to 3 feet from the source of exposure, what would be the new exposure rate according to the inverse square law?

Answer 89

256 R/ min