Density Brightness

Question 0

The same image quality attribute but are used and defined differently

Answer 0

Density / brightness

Question 1

Relates directly to the amount of exposure received by the image receptor

Answer 1

Density and brightness

Question 2

Describes images displayed on the film

Amount of blackening in the film

Answer 2

Density

Question 3

Density is the result from the development of the exposed _______ from film’s emulsion

Answer 3

Silver bromide crystals

Question 4

Is equal to the logarithim to the base 10 of light incident (Io) on the film to light transmitted through the film (I1)

Answer 4

Density (optical density)

Question 5

Images displayed on a computer monitor

Amount of luminance

Answer 5

Brightness

Question 6

Density value must be within human visibility (OD = ______ )

Answer 6

0.25 to 2.50

Question 7

Controlling factor of density

Answer 7

mAs

Question 9

Factors that affect density not the brightness

Answer 9

Film / screen system

Processing

Question 9

Contrast value for film / screen system can be taken through ______

Answer 9

Sensitometry

Question 10

Degree of difference in density / brightness levels between areas

Answer 10

Contrast

Question 11

Sensitometry can be measured through

Answer 11

Average gradient

Gamma

Question 12

Higher value means high contrast

Answer 12

Average gradient

Question 13

Steeper the slope , higher that contrast

Answer 13

Gamma

Question 14

Difference in density / brightness between adjacent values are great

Achieve with use of low kVp

Answer 14

High contrast

Question 15

Differences in density / brightness between adjacent values are small

Use of high kVp

Answer 15

Low contrast

Question 16

Range of optical density from the lightest to the blackest part of the radiograph

Answer 16

Scale of contrast

Question 17

Great difference between available densities

Answer 17

Short scale contrast

Question 18

Little difference between available densities . Many shades of grey

Answer 18

Long scale of contrast

Question 19

Only factor that controls contrast

Answer 19

kVp

Question 21

The number of bits available for each pixel is represented by _____

Answer 21

Pixel bit depth

Question 22

High contrast can be achieve by the use of

Answer 22

low kVp

Question 23

Low contrast can be achieve by the use of

Answer 23

High kVp

Question 24

too low contrast can result from

Answer 24

too much scatter/fog