Presentation is loading. Please wait.

Presentation is loading. Please wait.

Quality of the radiographic image

Similar presentations


Presentation on theme: "Quality of the radiographic image"— Presentation transcript:

1 Quality of the radiographic image
Contrast Image geometry Characteristics of the x-ray beam Image sharpness and resolution

2 Perception of the radiographic image
Partial images-we all see the same partial images but we don’t necessarily perceive the same object Contrast Context

3 Effect of partial image

4 The effect of contrast

5 The effect of context

6 Image geometry Positioning of the film, object and x-ray beam
Focal spot size and principle of line focus Focal spot-object distance (FSOD), object- to film-distance (OFD)

7 Ideal image geometry requirements

8 Focal spot size, heat distribution and image sharpness
Focal spot 1mm Heat needs to be distributed over as large as possible area Principle of line focus

9

10

11

12 Focal spot-to film-distance(FSFD)

13 FSFD Increasing the distance between the focal
spot and the object results in an image with increased sharpness and less magnification of the object

14 Object-to film- distance (OFD)

15 Decreasing the distance between the
object and the film increases the sharpness and result in less magnification of the object

16 Image shape distortion

17 Cont’d

18 Bisecting angle technique-shape distortion

19

20

21 Cont’d


Download ppt "Quality of the radiographic image"

Similar presentations


Ads by Google