Principles of Exposure and Image Quality

Question 1

Prime Factors of Radiographic Exposure

Answer 1

mA,kVp,SID,and Exposure Time

Question 2

What affects X-Ray Quantity:

Answer 2

mAs,kVp,SID,and Filtration

Question 3

What both affect Quantity and Quality:

Answer 3

Kilovoltage and FIltration

Question 4

What affects the rate of exposure of exposure and is the number of photons produced per second during an exposure:

Answer 4

Milliamperage

Question 5

The quantity of exposure is also :

Answer 5

Directly proportional to the exposure time

Question 6

The Unit used to indicate the total quantity of X-Rays in an exposure is:

Answer 6

Milliampere-seconds,abbreviated mAs

Question 7

The Quantity of exposure and the patient dose are:

Answer 7

Directly proportional to the mAs

Question 8

Is the Primary controller of radiographic density:

Answer 8

Millampere-Seconds;mAs

Question 9

Controls both the quality and the Quantity of the X-Ray beam:

Answer 9

Kilovoltage

Question 10

Is the primary controller of the penetration of X-Rays:

Answer 10

Kilovoltage (kVp
)

Question 11

Also has an affect on the Quantity of exposure to the IR:

Answer 11

Kilovoltage (kVp)

Question 12

Is directly affected by kVp:

Answer 12

The Contrast

Question 13

High kVp produces:

Answer 13

Low contrast images

Question 14

Low kVp produces:

Answer 14

High contrast images

Question 15

kVp is the primary controller of:

Answer 15

Radiographic Contrast

Question 16

Affects the intensity of the X-Ray beam and the Quantity of X-Rays:

Answer 16

Source to Image Distance;SID

Question 17

How is the intensity of the beam expressed:

Answer 17

Inverse Square Law

Question 18

The Intensity is _______ to the square of the distance:

Answer 18

Inversely Proportional

Question 19

The four primary factors that directly affect how the X-Ray image looks:

Answer 19

Density,Contrast,Distortion and Spatial Resolution

Question 20

Density and Contrast are considered:

Answer 20

Photographic properties

Question 21

Distortion and Recorded Detail are considered:

Answer 21

Geometric Properties

Question 22

An image too dark is:

Answer 22

Over exposed

Question 23

An image that is too late is:

Answer 23

Under exposed

Question 24

is primary controlled by varying the mAs:

Answer 24

Density

Question 25

Affects the detail:

Answer 25

Density

Question 26

Refers to the mass density,or atomic number,of the body part:

Answer 26

Tissue Density

Question 27

The brightness (Density) on the viewing monitor is adjusted by a control called:

Answer 27

Window Level

Question 28

Contrast is primarily controlled on:

Answer 28

kVp;Kilovoltage

Question 29

A greyscale that shows the amount of penetration of each step:

Answer 29

Penetrometer

Question 30

The range of differences in the intensity of the X-Ray beam after it has been attenuated by the patient:

Answer 30

Subject Contrast

Question 31

A general unwanted exposure to the radiographic image:

Answer 31

Fog

Question 32

collimation will also affect the:

Answer 32

Contrast to the image

Question 33

Is a geometric property and refers to differences between the actual subject and its radiographic image:

Answer 33

Distortion

Question 34

Always in the form of magnification enlargement:

Answer 34

SIze Distortion

Question 35

Is the result of unequal magnification of the actual shape of the structure :

Answer 35

Shape distortion

Question 36

It appears shorter than it really is and occurs when body part is not correctly aligned:

Answer 36

Foreshortening

Question 37

Projects the object so it appears longer than it really is:

Answer 37

Elongation

Question 38

Is also a geometric property.Before digital imaging.It was referred to as recorded detail:

Answer 38

Spatial Resolution

Question 39

Refers to the sharpness:

Answer 39

Spatial Resolution

Question 40

The geometric factors that control of the image are:

Answer 40

SID,OID and Focal Spot Size

Question 41

Is the actual anatomic area ,body part or structure shown in the radiographic image:

Answer 41

The Umbra

Question 42

Describes the “Unsharp edges” of the umbra,or body part,also referred to as a blue or geometric unsharpness:

Answer 42

The Penumbra

Question 43

Involves movement over which the patient has no control,such as tremors,peristalsis,and heartbeats:

Answer 43

Involuntary Motion

Question 44

Normally controllable ,although certain patients may be unable to control them;unconscious patients or small babies who cannot hold their breath for a few seconds;patients who are in severe pain,or those who are unable to cooperate:

Answer 44

Voluntary Motion

Question 45

Term used to describe the situation in which a grainy or mottled (spotty) image is created:

Answer 45

Quantum Mottle