Deck 21: Film Sensitometry

Question 1

The density at no exposure is termed the

A)toe.
B)base plus fog.
C)shoulder.
D)D_max.

Answer 1

base plus fog.

Question 2

Resolution is also known as

A)detail.
B)definition.
C)resolving power.
D)all of the above

Answer 2

all of the above

Question 3

D log E curves are also known as ____ curves.

A)characteristic
B)sensitometric
C)Hurter and Driffield (H&D)
D)all of the above

Answer 3

all of the above

Question 4

The maximum density that the film is able to record is the

A)toe.
B)shoulder.
C)straight line portion.
D)D_max.

Question 5

A penetrometer is also referred to as a

A)densitometer.
B)step wedge.
C)sensitometer.
D)gradient wedge.

Question 6

The ability of film to stop light is termed

A)incidence.
B)lucency.
C)opacity.
D)neutrality.

Question 7

The toe of the D log E curve is controlled by

A)phenidone.
B)hydroquinone.
C)PQ developer.
D)all of the above

Question 8

A penetrometer is excellent for monitoring all of the following EXCEPT

A)x-ray equipment.
B)film processors.
C)film/screen combinations.
D)image receptor combinations

Question 9

Which point on the D log E curve represents the point where all the silver halide crystals have a full complement of silver atoms?

A)toe
B)shoulder
C)straight line portion
D)D_max

Question 10

Equipment used to carry out film processing sensitometric procedures includes a

A)penetrometer.
B)sensitometer.
C)densitometer.
D)both b and c

Question 11

Each of the following choices are features of the typical D log E curve EXCEPT the

A)toe.
B)arm.
C)shoulder.
D)gamma.

Question 12

Which type of film is preexposed to D_max so that additional exposure will cause a reversal of the image?

A)screen film
B)mammographic
C)duplication
D)laser film

Question 13

The primary characteristics of film include all of the following EXCEPT

A)resolution.
B)amplitude.
C)speed.
D)contrast.

Question 14

The optical density formula includes which factors?

A)intensity of incident light
B)intensity of transmitted light
C)the log of 10
D)all of the above

Question 15

A sensitometer is excellent for monitoring which one of the following?

A)film density
B)film processors
C)film/screen combinations
D)none of the above

Question 16

A densitometer is an instrument that provides a readout of

A)radiographic density.
B)radiographic contrast.
C)recorded detail.
D)image distortion.

Question 17

Film may experience fog in the form of

A)heat.
B)light.
C)radiation.
D)all of the above

Question 18

Additional exposure beyond D_max results in a process known as

A)solarization.
B)resolution.
C)contrast.
D)electrification.

Question 19

Where on the D log E curve is the majority of diagnostic information found?

A)toe
B)shoulder
C)straight line portion
D)D_max

Question 20

The shoulder of the D log E curve is controlled by

A)phenidone.
B)hydroquinone.
C)sodium carbonate.
D)potassium bromide.

Question 21

As the slope of the straight line increases, the radiographic contrast

A)increases.
B)decreases.
C)is unaffected.
D)reverses.

Question 22

Film resolution is determined by the

A)silver halide crystal size.
B)processor time.
C)processor temperature.
D)speed point.

Question 23

Film sensitivity is affected by the

A)size of the silver halide crystals.
B)number of sensitivity specks.
C)thickness of the emulsion layer.
D)all of the above.

Question 24

Match the following choices with the correct statement as they relate to processor film sensitometry.
numerically measures radiographic density

A)speed point
B)gamma
C)step wedge
D)densitometer
E)characteristic curve
F)latitude
G)average gradient
H)sensitometer

Question 25

Match the following choices with the correct statement as they relate to processor film sensitometry.
required for processor quality control

A)speed point
B)gamma
C)step wedge
D)densitometer
E)characteristic curve
F)latitude
G)average gradient
H)sensitometer

Question 26

Contrast is characterized on the H&D curve by

A)how close the toe is to the origin.
B)the slope of the straight line.
C)how close the shoulder is to D_max.
D)the density at a given exposure value.

Question 27

The single most important factor in efficient silver recovery is the

A)developer replenishment.
B)fixer dwell time.
C)fixer temperature.
D)film transport time through the processor.

Question 28

Radiographic film/screen system resolution is generally controlled by

A)intensifying screen crystals.
B)film emulsion crystals.
C)Bucky oscillation.
D)SID.

Question 29

After exposure to x-radiation, the radiographic film

A)must be processed immediately.
B)is twice as sensitive and must be handled carefully.
C)contains the visible image in the cassette.
D)is placed in a reader for laser scanning.

Question 30

The difference between adjacent densities on a radiograph is the

A)resolution.
B)speed.
C)definition.
D)contrast.

Question 31

As crystal size increases, resolution

A)increases.
B)decreases.
C)increases exponentially.
D)is unaffected

Question 32

Match the following choices with the correct statement as they relate to processor film sensitometry.
inversely related to contrast

A)speed point
B)gamma
C)step wedge
D)densitometer
E)characteristic curve
F)latitude
G)average gradient
H)sensitometer

Question 33

Match the following choices with the correct statement as they relate to processor film sensitometry.
penetrometer

A)speed point
B)gamma
C)step wedge
D)densitometer
E)characteristic curve
F)latitude
G)average gradient
H)sensitometer

Question 34

Match the following choices with the correct statement as they relate to processor film sensitometry.

- $\Delta$ D ÷ $\Delta$ E

A)speed point
B)gamma
C)step wedge
D)densitometer
E)characteristic curve
F)latitude
G)average gradient
H)sensitometer

Question 35

The amount of radiographic density a film produces for a given amount of exposure is termed the

A)gamma.
B)reciprocity.
C)speed.
D)resolution.

Question 36

Match the following choices with the correct statement as they relate to processor film sensitometry.
a measure of the straight line portion of the H & D curve

A)speed point
B)gamma
C)step wedge
D)densitometer
E)characteristic curve
F)latitude
G)average gradient
H)sensitometer