問題一覧
1
An x-ray beam that could pass through dense tissue would have high ________.
penetrability and quality
2
Beam energy is affected by __________.
kVp and filtration
3
The half value layer (HVL) of an x-ray beam is a measuring of beam _________.
energy
4
The penetrability of an x-ray beam is called x-ray ________.
quality
5
X-ray intensity increases in direct proportion to increases in ________.
mAs
6
The number of x-rays in the useful beam defines x-ray ___________.
Intensity
7
If the quantity of electrons hitting the target is doubled, the x-ray intensity is __________.
increased by a factor of two
8
If the distance from the source to the image (SID) is reduces by half, how is the x-ray intensity at the image affected?
It is increased 4 times
9
If a technologist changes the technique from 70 kVp @ 200 mAs to 70 kVp @ 400 mAs, the x-ray intensity will _______ and the optical density will _______.
double, double
10
X-ray intensity is proportional to ______.
kVp2
11
Decreasing the kVp will increase _________.
patient pose
12
Standard x-ray machines produce about _____ uGya/mAs at 70 kVp meansrued at 100cm SID
50
13
A 10% increase in kVP has ______ effect on x-ray intensity than/as a 10% increase in mAs.
much greater
14
Image contrast is affected by ________.
beam quality and kVp
15
A low-quality beam would also have low _______.
penetrability
16
If the intensity of a 70 kVp exposure at 20 mAs is 1.0 mGya, what would it be at 5mAs?
0.25 mGya
17
If an exposure is 0.5 mGya at an SID of 40 inches, what would the exposure be at an SID of 60 inches?
0.222 mGya
18
An increase of 15% in kVp is equivalent to increasing mAs _______.
100%
19
Grays, or milligrams, in air are the measurement for x-ray ____________.
quantity, exposure and intensity
20
The inverse square law has the same effect on x-ray ________ and x-ray _________.
intensity; exposure
21
If filter thickness is ______, the x-ray intensity is _________.
increased; reduced and reduced; increased