Radiography 2 Flashcards Preview

FINALS - SPRING 2016 > Radiography 2 > Flashcards

Flashcards in Radiography 2 Deck (99)
Loading flashcards...
1

To make a visible change in density, one must increase or decrease mAs by ____%.

30%

2

Is mAs directly or indecently proportional to patient dose?

Directly

3

KVp is the main controlling factor of _______.

Contrast

4

KVp also affects density mainly because it also controls ______.

Scatter

5

Inverse Square Law:
If you double the distance, you cover ____ the area with ____ the intensity

4x
1/4

6

15% Rule involves _____.

KVp

7

30% Rule involves ____.

mAs

8

15% Rule
Below 90 kVp:
+10 kV =
-10kV =

Cut mAs in 1/2
Double mAs

9

15% Rule
Above 90 kVp:
+15 kV =
-15 kV =

Cut mAs in 1/2
Double mAs

10

Inverse Square Law:
If you cut distance in 1/2, you cover ____ the area with _____ the intensity.

1/4
4x

11

Increased OID = _______ density
(Due to Air Gap & scatter bypassing IR)

Decreased

12

Increased speed screen = ________ mAs, pt dose, and detail

Decreased

13

Decreased speed screen = ______ mAs, pt dose, and detail

Increased

14

Increased collimation (smaller field size) = ______ density

Decreased

15

Decreased collimation (larger field size) = ______ density

Increased

16

ARRT calls density __________ or "RE"

Receptor Exposure

17

As part density increases, IR density _________.

Decreases

18

As part density decreases, IR density (RE) ________.

Increases

19

Degrees of differences in density

Contrast

20

High KV:
______ scale
______ contrast
______ colors
______ latitude
______ pt dose
______ scatter
______ penetration

Long
Low
Many
Wide
Decreased
Increased
More

21

Low KV:
______ scale
______ contrast
______ colors
______ latitude
______ pt dose
______ scatter
______ penetration

Short
High
Few
Narrow
Increased
Decreased
Less

22

TBMFG

Teeth
Bone
Muscle
Fat
Gas

23

Increased grid ratio = _______ contrast (less scatter)

Increased

24

Decreased grid ratio = _______ contrast (more scatter)

Decreased

25

Increased collimation = ________ contrast

Increased

26

Decreased collimation = ________ contrast

Decreased

27

Additive Pathology requires a/an _______ in technique

Increase

28

Destructive Pathology requires a/an _______ in technique

Decrease

29

3 geometric factors that control recorded detail:

Focal Spot (small)
OID (short)
SID (long)

30

Additive Pathology ex: (2)

Pneumonia
CHF