Exam 1 - 4. Radiation Physics Flashcards
3
The intensity of the X-ray beam is the _________.
3
What is the formula for the intensity of the X-ray beam?
3
The quantity of the x-ray beam is the number of _____. It is primarily realted to the ______ and ______.
3
Quantity of the X-ray beam is expressed as ______.
4
What is the quality of the X-ray beam?
4
The quality of the X-ray beam is controlled primarily by the ____.
4
X-ray of beam is _____, meaning there is a _____ of energies.
5
What are 6 factors that control the X-ray beam intensity?
6
As tube voltage increases, what happens to the number of photons generated?
6
As tube voltage increases, what happens to the mean energy of photons?
6
As tube voltage increases, what happens to the maximum energy of photons?
7
As exposure time increases, what happens to the number of photons generated?
7
As exposure time increases, what happens to the mean energy of photons?
7
As exposure time increases, what happens to the maximum energy of photons?
8
As tube current (mA) increases, what happens to the number of photons?
8
As tube current increases, what happens to the mean energy of photons?
8
As tube current increases, what happens to the maximum energy of photons?
9
What does filtration selectively remove?
10
What are the 4 components of inherent filtration?
10
What is the component for added filtration?
10
What is the formula for total filtration?
10
What is the mm of filtration for 50 kVp to 70 kVp?
10
What is the filtration for 70 kVp and greater?
11
As filtration increases, what happens to the number of photons?
11
As filtration increases, what happens to the mean energy of photons?
11
As filtration increases, what happens to the maximum energy of photons?
12
What does collimation do?
12
What effect does collimation have on the number of photons?
12
What effect does collimation have on the mean energy of photons?
12
What effect does collimation have on the maximum energy of photons?
13
What is the Inverse Square Law?
13
What is the formula for the Inverse Square Law?
14
The Inverse Square Law is one method of calculating the new beam intensity when changing the ______ to ______.
14
What is the intensity when the source to receptor distance is doubled?
14
What is the new intensity when the source to receptor distance is tripled?
14
What is the intensity when the source to receptor distance is halved?
15
As the source to receptor distance increases, what happens to the number of photons?
15
As the source to receptor distance increses, what happens to the mean energy of photons?
15
As the source to receptor distance increases, what happens to the maximum energy of photons?
17
What alters density?
17
What alters contrast?
18
What is density?
18
Density is related to _____ reach the receptor.
18
Density is primarily controlled by ____ and less so by _____.
18
Why is density primarily controled by mAs and somewhat by kVp?
19
What is the relationship between mA and exposure time?
20
What is contrast?
20
Contrast is primarily controlled by ____.
22
High contrast will have a ____ kVp.
22
In high contrast, the density differences between adjacent areas are ____. There are ____ shades of grey.
23
Low contrast has _____ kVp.
23
In low contrast, the density differences between adjacent areas are ______; there are ____ shades of grey.
25
High contrast is best for visualizing ___.
25
Low contrast is best for visualizing ______.
