Question 1

The densities above 2.5 on a film are represented in the _____ portion of the characteristic curve.

Accepted Answer

A)   base + fog
B)   toe
C)   straight-line portion
D)   shoulder D

Question 2

The technologist primarily controls radiographic contrast by varying the _____.

Accepted Answer

A)   image receptor
B)   kilovoltage
C)   voltage ripple
D)   milliamperage B

Question 3

If 10% of the viewbox light is transmitted through an area of film,what is the optical density in that area?

Accepted Answer

A)   0
B)   1
C)   2
D)   3 B

Question 4

The slope of the _____ portion of the characteristic curve shows the film contrast.

Accepted Answer

A)   base
B)   shoulder
C)   toe
D)   straight line

Question 5

Radiographic _____ is random fluctuation in the optical density of a radiograph.

Accepted Answer

A)   detail
B)   contrast
C)   noise
D)   resolution

Question 6

An image receptor with _____ can be used over a greater range of exposures.

Accepted Answer

A)   wide latitude
B)   high contrast
C)   narrow latitude
D)   high average gradient

Question 7

_____ is defined as the ability to image two separate objects and visually detect one from the other.

Accepted Answer

A)   Contrast
B)   Resolution
C)   Detail
D)   Noise

Question 8

Distortion can be reduced by _____.

Accepted Answer

A)   placing the object plane perpendicular to the image plane
B)   placing the object plane parallel to the image plane
C)   directing the central ray 15° from the object plane
D)   increasing the SID and the OID

Question 9

Subject contrast is affected by _____.

Accepted Answer

A)   mAs
B)   focal spot size
C)   patient thickness
D)   voltage ripple

Question 10

The best way to minimize magnification is to use a _____.

Accepted Answer

A)   long SID
B)   small OID
C)   large OID
D)   both A and B

Question 11

A high quality radiograph should always demonstrate _____.

Accepted Answer

A)   structures and tissues
B)   high contrast
C)   minimum magnification
D)   all of the above

Question 12

What is the formula for the magnification factor?

Accepted Answer

A)   MF = SID/SOD
B)   MF = SOD/SID
C)   MF = (SID/SO
D)  2
D)   MF = SID2/SOD

Question 13

Patient thickness affects image quality by affecting _____.

Accepted Answer

A)   magnification
B)   radiographic contrast
C)   focal spot blur
D)   all of the above

Question 14

Optical density is primarily controlled by changing the _____.

Accepted Answer

A)   kVp
B)   mAs
C)   film
D)   SID

Question 15

Radiographic image quality is improved when the _____ is increased.

Accepted Answer

A)   source image distance
B)   focal spot size
C)   film speed
D)   screen speed

Question 16

The inherent base density plus fog density in film is _____.

Accepted Answer

A)   0.0-0.1
B)   0.1-0.3
C)   0.5-1.0
D)   1.0-1.3

Question 17

The base + fog of a film is shown below the _____ of the characteristic curve.

Accepted Answer

A)   straight-line portion
B)   average gradient
C)   toe portion
D)   shoulder portion

Question 18

Which of these body parts has the highest subject contrast?

Accepted Answer

A)   abdomen
B)   skull
C)   chest
D)   pelvis

Question 19

In general radiography,the useful optical densities lie between _____ and _____.

Accepted Answer

A)   0.25, 2.25
B)   0.5, 1.0
C)   1.0, 1.5
D)   2.0, 3.0

Question 20

Focal spot blur can be reduced by using _____.

Accepted Answer

A)   a small focal spot
B)   a shorter SID
C)   a larger OID
D)   all of the above

Exam 10: Concepts of Radiographic Image Quality