Radiographic Image Formation, Image Detail And Quality Control Flashcards Preview

Radiology > Radiographic Image Formation, Image Detail And Quality Control > Flashcards

Flashcards in Radiographic Image Formation, Image Detail And Quality Control Deck (13)
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1

Magnification =

focal object distance (FOD)/ focal film distance (FFD)

2

Image detail depends on

Geometric unsharpness
Motion unsharpness
Inherent unsharpness
Quantum mottle

3

Geometric unsharpness

Focal spot size
Focal spot film distance
Object film distance
Film screen contact

4

Focal spot size

5

Increase object to film distance =

Increase magnification

6

Inherent unsharpness is I nherent to

Film-screen combination

7

Quantum mottle

The effect of a limited number of X-Ray photons on the appearance of the radiograph

8

Distortion results from

Unequal magnification of different parts of same object

9

Increase mA=

Increase film blackness

10

Increase exposure time =

Increase film blackness

11

Increase focal film distance =

Decrease film blackness

12

Low KVp will produce films with

High contrast

13

High KVp will produce films with

Low contrasts