Term
| What is the purpose of radiology? |
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Definition
| -is an in vivo demonstration of anatomy at that millisecond in time |
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Term
| What is the goal of radiography? |
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Definition
| -Information: ID a lesion and make a diagnosis |
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Term
| What are the 2 rules of naming a radiographic projection? |
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Definition
1. use proper descriptive veterinary terminology
2. Nam the entrance and exit surfaces as hit in direction of x-ray beam |
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Term
| What 4 factors determine radiopacity? |
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Definition
1. atomic number
2. physical density
3. thickness of tissue in x-ray path
4. ability of the adjacent material/tissue to absorb radiation |
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Term
From darkest to lightest on a radiograph, order the following things:
air
soft tissue
metal
fat
mineral |
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Definition
| air => fat => soft tissue => mineral => metal |
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Term
| True or False: A trianed eye can distinguish between solid soft tissue and a soft tissue structure filled with fluid. |
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Definition
| -FALSE, cannot distinguish b/n solid soft tissue structure and one filled with fluid |
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Term
| Why is it important to learn principles to correctly interpret radiographs? |
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Definition
| -b/c the image is a REPRESENTATION of the truth which CAN BE MISLEADING |
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Term
| A MINIMUM of _____ views are needed to determine true shape and true orientation. Why? |
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Definition
-two (orthogonal)
-loss of depth perception |
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Term
| Definition: Mach Phenomenon |
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Definition
| -edges of superimposed structures are enhanced by thin white or black lines at sharp boundaries (optical illusion) |
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Term
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Definition
| -the area overlaid by two different structures that appears more dense then either structure |
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Term
| Definition: Silhouette Sign/ Border effacement |
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Definition
| -when two structures are adjacent to each other with similar radiopacity and thus the margins of both appear distorted |
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Term
| What are Roentgen's 6 signs? (also called radiographic signs) |
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Definition
-changes in:
1. size
2. shape
3. margination
4. number
5. opacity
6. location |
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Term
| For Lateral and Oblique projections, the patient's head is on the (left/right). Why? |
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Definition
-left
-easier recognition |
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Term
| DV and VD projections have the patient's right on the viewer's (left/right). |
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Definition
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Term
| In caudocranial and dorsopalmer projections, lateral is on the (left/right). |
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Definition
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