11085667
Description
Flashcards by Alex Ertmer, updated more than 1 year ago
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Created by Alex Ertmer
over 6 years ago
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| Question | Answer |
| Difference between adjacent densities | Contrast |
| Difference between adjacent densities that comprise the contrast are great. | High Contrast |
| Fewer shades of gray are present. | High Contrast |
| Three other terms for High Contrast: | 1)Short Scale 2)Increase in Contrast 3)Greatest Contrast |
| Differences between adjacent densities are minimal. | Low Contrast |
| Different names for Low Contrast | 1)Long Scale 2)Decrease Contrast) 3)Least Contrast |
| An abdomen x-ray is an example of ____ ____. | Low Contrast |
| High contrast uses ____ kVp. | Lower kVp |
| Low contrast uses ____ kVp. | Higher kVp |
| The number of useful visible densities or shades of gray on a radiograph. | Scale of Contrast |
| Total amount of contrast is determined by which two things? | 1)Subject Contrast 2)Radiographic (film) Contrast |
| The range of differences in the intensity of the x-ray beam after it's been attenuated by the patient. | Subject Contrast |
| The absorption characteristics of the anatomic tissue imaged & the quality of the x-ray beam. | Subject Contrast |
| Subject Contrast is determined by: | Patient Factors -Thickness of tissue -Type of Tissue -kVp |
| _____ is the primary controller in subject contrast. | kVp |
| Increasing kVp increases fog levels (_____). | Scatter |
| _____ _____ is a simple tool to help focus on the contrast in a selected area. | Contrast Mask |
| This helps to eliminate adjacent information making evaluation easier. | Contrast Mask |
| Contrast mask should not replace _____. | Collimation |
| _____ is a post exposure tool. | Contrast Masking |
| A visible change in contrast will not be visible until kVp is change by ____ - ____%, depending on range. | 4%-12% |
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