Term
| Detail perception on a radiograph |
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Definition
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Term
| Distortion to image, longer than actual size |
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Definition
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Term
| Distance between source of x-rays and the grid resulting in no grid cutoff |
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Definition
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Term
| The definition of edges on anatomical structures |
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Definition
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Term
| Difference in density and mass of two anatomic structures |
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Definition
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Term
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Definition
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Term
| Density difference on a radiograph |
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Definition
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Term
| A grid with angled lead strips |
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Definition
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Term
| Radiation reflected from behind the image back to the image |
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Definition
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Term
| Degree of blackness on a radipgraph |
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Definition
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Term
| Moves across the x-ray beam during exposure |
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Definition
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Term
| Also called a crisscross grid |
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Definition
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Term
| Absorption of primary x-rays by the grid lines |
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Definition
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Term
| Lead strips are parallel and at right angles |
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Definition
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Term
| height of lead strips per centimeter area |
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Definition
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Term
| Amount of exposure needs to be increased due to grid absorption |
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Definition
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Term
| Distortion to image, shorter than actual size |
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Definition
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Term
| Radiographic Quality depends on radiographic : |
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Definition
- Density
- Contrast
- Magnification and distortion
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Term
| Black areas on an x-ray are produced by: |
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Definition
| Metallic Silver deposits in film coating being converted by exposure to x-rays and processing chemicals |
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Term
| Many black/dar areas mean the film was exposed to higher density which means |
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Definition
| More x-rays have reached the film |
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Term
| What are some factors affecting density: |
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Definition
- Total number of x-rays (mAs)
- Penetrating power (kVp)
- Developing Time (processing)
- Temperature of developer (Processing)
- Types of tissue
- Thickness of tissue
Remember: If the first four factors are increased the greater the denisty can be achieved |
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Term
True or False
The less tissue density the less radiogrpahic density there is |
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Definition
False
The greater the tissue density the less radiogrpahic density will be |
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Term
| If the mA is to low how will the film appear? |
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Definition
Pale
Note: If it is high the film have an overall black appearance |
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Term
| Great density difference equals a shorter scale appearing black and white with few grays this is: |
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Definition
High Contrast
Remember: This is preferred for spin or extremity films (Bone) Lower kVp, lower contrast is the opposite |
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Term
| What are some factors affecting Contrast? |
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Definition
- Subject Contrast
- kVp level
- Scatter radiation
- Film type and film fog
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Term
| This reduces backscatter/scatter making less stray x-rays hitting the table or tray |
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Definition
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Term
| As grid ratio increases what happens to the efficiency? |
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Definition
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Term
| Describes the definition of edges between the anatomical structure on an x-ray |
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Definition
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Term
| The femur needs to be parallel to the cassette , if it is no the femur will appear ____. |
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Definition
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