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Related Flashcards
Cards In This Set
| Front | Back |
|
What refers to
the overall blackening of the finished radiograph?
|
Radiographic/Optical
Density
|
|
Over exposed
|
|
Film that is too light has a low optical density?
|
Under exposed
|
|
What are the 2 controlling factors that affect density?
|
Milliamperage and Time
|
|
What are 3 influencing factors that affect density?
|
KVp, SID and collimation
|
|
As the
mAs is increased, the quantity of radiation is 1._______ and the optical
density in 2._______
|
1. increased 2. increased
|
|
When
x-rays need to be repeated because of density errors adjust the mAs by a factor
of?
|
2
|
|
T/F: The effect of kVp on density is proportional
|
False, it is not proportional
|
|
T/F: When increasing kVp, density is also increased
|
True
|
|
What is the 15% rule?
|
A 15% increase in kVp will have the same effect on density as doubling the mA's
|
|
T/F: If you are trying to change the density of the X-ray, you should use the kVp to do so?
|
False! Use the mA
|
|
What is the inverse square law?
|
The
intensity of the x-ray beam is inversely proportionate to the square distance
from the source
|
|
T/F: The faster the film-screen speed system, the more sensitive it is
to density
|
True
|
|
T/F: Increasing the field size is the same as saying less collimation?
|
True
|
|
Radiographic contrast is the product of what 2 major factors?
|
Film contrast and subject contrast
|
