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