 |
|
|
New User?
Register Here... |
|
|
|
|
|
|
| Login |
|
|
|
 | |
| Title |
| Radiographic Imaging, Part 4: Distortion ...COMING SOON! (0 credit hours) |
| Abstract |
| Distortion is the fourth of nine modules in the Radiographic Imaging program. This module will help you understand size and shape distortion as they occur in radiographic images and the relationships of factors that affect distortion. |
| Author |
Elsevier Inc.,
 This module is adapted from Mosby's Radiography Online: Radiologic Physics, copyright © 2002 - 2004 by Elsevier (USA) reproduced by permission of Elsevier Inc. and edited for use as CE content by Denise Moore, Professor of Radiology, Sinclair Community College.
|
|
| Objectives |
On completion of this module, you should be able to do the following.
1. Define the important terms in the module.
2. Explain distortion as a geometric characteristic.
3. Describe factors responsible for size distortion (magnification) and explain why this is inevitable on all images.
4. State the effects of changes in SID and OID on magnification.
5. Explain when and why magnification technique might be used purposefully.
6. Describe how each of the following situations can increase shape distortion:
- Thicker structures
- Central ray not perpendicular to image receptor
- Body part being imaged not parallel to image receptor
- Central ray not centered on body part being imaged
- X-ray beam angled
7. List two things a radiologic technologist can do, in addition to correct positioning, to minimize shape distortion or to obtain an accurate measurement on an image. |
| Resources |
For additional information about distortion, visit the following site.
Distortion, from Principles of Radiographic Exposure |
|
|
