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Radiography I > Producing the Image > Flashcards

Flashcards in Producing the Image Deck (28)
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1

Common problem that gives the radiograph an overall gray appearance and can be caused by numerous things

Film fog

2

4 factors of exposure

1. kVp
2. Milliamperes (mA)
3. Time (fractions of a second)
4. Distance (SID)

3

How much contrast is on the radiograph

Radiographic contrast

4

A result of the absorption characteristics of the anatomical tissue radiographed

Subject contrast

5

Collects scatter radiation under the table top

Grid

6

Eliminates soft rays

Filter

7

Changes the field of the x-ray

Collimation

8

Measurable difference between 2 adjacent densitites; bone vs. lungs
Quality of x-rays; "power" behind x-rays

Contrast

9

% of blackness
Quantity of x-rays

Density

10

What color does bone show up?

White

11

What color does soft tissue show up?

Grey

12

What color do gases show up?

Black

13

What color does metal show up?

White

14

Affects contrast

kVp

15

Affects density

mAs

16

Can affect the radiographic contrast

Time

17

Short scale of contrast

High contrast

18

Long scale of contrast

Low contrast

19

Most common artifact

pt movement

20

Low mAs results in

pale film

21

High mAs results in

overall black appearance

22

Period of time it takes for the x-rays to leave the tube
Fractions of a second

Time

23

The intensity of the radiation at a location is inversely proportional to the square distance from the source of the radiation

Inverse Square Law

24

Film exposed in 2 ways

Table top and grid

25

The distance between the tube and the film

SID

26

SID

source image distance

27

FFD

Focal Film Distance

28

Sante's rule

(2 x thickeness in cm) + 40 + grid