Improper spetral lmatching between rare earth intensifying screens and film emulsion results in:
d excessive density
C. insufficient density
If a radiograph of an average size knee was perfromed usinjg automatic exposure control andall three photcells were selected, the resulting radiograph would be demonstrated:
B. insufficient density
Which of the following radiographic accessories functions to produce uniforom densities on a radiograph?
B. compensating filter
which of the following would cause white artifacts on a radiograph?
C. dirt in the cassette
The principal reason for using a grid is to
C. increase radiographic contrast
a supine chest taken at 40" Sid will demonstrate:
D. a larger heart size
With all factors remaining the same, beam restriction will result in _______
C. less density
The study of the relationship between the intensity of exposure and the blackness after processing is called:
C. sensitometry
The Anode heel effect is emphasized with
1. long SID
2. large film size
3. small target angle
C. 2,3 ( with short SID)
A characteristic curve with a steep slope represents a film that is
1. fast
2. low contrast
3. low latitude
D. 1,3
Which of the following affects VISIBILITY of detail?
B. contrast
Resolution in C.R. is determined by:
C. matrix size
Intensifying screen speed increases with increasing:
A. phosphor thickness
Lateral decentering will result in:
B. overall loss of density
The number of lead stips in a grid is called:
B. grid frequency
Which of the following factors would result in a film with the lowest contrast?
B. 10 mAs, 80 kvp
The ability to distinguish anatomic structures of similar subject contrast is _____ resoluation:
B. contrast
Which of the following system speeds would result in the LEAST density, assuming the xposure factors remain unchanged?
B. 100
Which of the following film characteristics involve the ability to record a wide range of densities?
C. film latitude
The shoulder of the H & D curve would have a density of approximately:
A. 2.5
The 15% rule should be used to manipulate:
A. contrast
What describes a radiograph lacking radiographic density?
D. underexposed
"B" represents fillm that has a:
a. high average gradient
b. low average gradient
b. low average gradient
"A" has ________contrast than B.
C. higher
With a variable kVp chart the kVp should be increased by _____for every cm.
A. 2
Collimation wil _______density when using manual techniques.
D. decrease
Which of the following would NOT increase the amount of scatter radiation created?
B. grid ratio
The line focus principle allows a ______ focal spot with a projected ______focal spot.
D. large: small
Which interaction in the x ray tube produces the majority of the x ray beam?
