Stack #132647 Matching
| What change in KVP is needed to make a visible change in contrast? |
| What factors secondarily influence density? |
| KVP, distance, beam restriction, anatomic part, grid, film/screen combination, processing, anode heel affect |
| Why should KVP not be used to control density? |
| changing KVP also changes contrast |
| how does increasing filtration affect contrast? |
| Contrast is decreased slightly because filtration increases the average photon energy of the beam |
| What is the primary controlling factor for contrast? |
| What is the loss of radiographic quality caused by movement of the patient or x-ray tube during exposure? |
| What effect do grids have on contrast? |
| improves contrast by removing scatter before it reaches the film which results in a shorter scale of contrast |
| How does SID affect size distortion? |
| As SID increases, size distortion decreases |
| What factors cause elongation of an object? |
| misalignment of the tube or film |
| What is the difference between adjacent densities within the radiographic image? |
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