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Flashcards in 2016 SPRING FINAL Deck (69)
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1

MAS is _____ proportional to pt. dose

Directly

2

KVP is main controlling factor of __1__ but it also affects density mainly because it controls __2__.

1. Contrast
2. Scatter

3

Inverse Square Law:
If you double the distance, you cover __1__ the area with __2__ the intensity. If you cut distance in half, you cover __3__ the area with __4__ the intensity.

1. 1/4
2. 1/4
3. 4x
4. 4x

4

30% rule deals with

MAS

5

15% rule deals with

KVP

6

30% rule states in order to make visible change in __1__ one must increase or decrease __2__ by 30%

1. Density
2. MAS

7

15% Rule:
BELOW 90 kV
1. +10 kV=_______
2. -10 kV=_______
ABOVE 90 kV
3. +15 kV=_______
4. -15 kV=_______

1. Cut mAs in 1/2
2. Double mAs
3. Cut mAs in 1/2
4. Double mAs

8

Increase OID=______ density

DECREASED (due to air gap and scatter bypassing IR)

9

Increased screen speed=
1. MAS
2. Pt. Dose
3. Detail
Decreased screen speed:
4. MAS
5. Pt. Dose
6. Detail

1. Decrease
2. Decrease
3. Decrease
4. Increase
5. Increase
6. Increase

10

Increased collimation=_____ density

Decrease

11

Decreased collimation=______ density

Increased

12

As part density increases, IR density __1__. As part density decreases, IR density (RE) __2__.

1. Decreases
2. Increases

13

Degree of differences in density

Contrast

14

High kV:
1. _____ scale
2. _____ contrast
3. _____ colors
4. _____ latitude
5. _____ pt. dose
6. _____ scatter
7. ______ penetration

1. Long
2. Low
3. Many
4. Wide
5. Decreased
6. Increased
7. More

15

Low kV:
1. ___scale
2. ___ contrast
3. ___ colors
4. ___ latitude
5. ___ pt. dose
6. ___scatter
7. ___ penetration

1. Short
2. High
3. Few
4. Narrow
5. Increased
6. Decreased
7. Less

16

Increased grid ratio= __1__ contrast ( __2__scatter)

1. Increased
2. Less

17

Decreased grid ratio=__1__ contrast ( __2__ scatter)

1. Decreased
2. More

18

Increased collimation=__1__ contrast.
Decreased collimaton=__2__ contrast

1. Increased
2. Decreased

19

Additive pathology requires what in technique?

Increase

20

Destructive pathology requires what in technique?

Decrease

21

3 geometric factors that control recorded detail:
1.
2.
3.

1. Focal Spot (Small)
2. OID (short)
3. SID (long)

22

As FS increases, unsharpness (penumbra) __1__ and recorded detail (umbra) __2__.

1. Increases
2. Decreases

23

As FS decreases, unsharpness (penumbra) __1__ and recorded detail (umbra) __2__.

1. Decreases
2. Increases

24

As SID increases, unsharpness (penumbra) __1__ and recorded detail (umbra) __2__.

1. Decreases
2. Increases

25

As SID decreases, unsharpness (penumbra) __1__, recorded detail (umbra) __2__.

1. Increases
2. Decreases

26

As OID increases, unsharpness (penumbra) __1__, and recorded detail (umbra) __2__.

1. Increases
2. Decreases

27

As OID decreases, unsharpness (penumbra) __1__ and recorded detail (umbra) __2__.

1. Decreases
2. Increases

28

As IR/screen increases, detail __1__. A IR/screen decreases, detail __2__.

1. Decreases
2. Increases

29

Greatest enemy of detail:________

MOTION

30

Ways to overcome motion:
A.
B.
C.

A. Short exposure time
B. Clear instructions
C. Immobilization