Distortion
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| Misrepresentation of the true size and shape of an object is the definition of? | Distortion
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| What is the most important factor in controlling distortion? | OID
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| What keeps distortion to a minimum? | Increased SID
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| What are the 2 types of distortion that can reduce the quality of a radiograph? | Size and shape
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| What occurs when the SID is increased? | Image is reduced
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| What size focal spot is used when doing macroradiography? | .3mm
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| When an object is placed halfway between the tube and the film, the image will be how many times larger? | 2 times
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| What percentage increase is usually used for magnification radiography? | 100%
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| The ratio of SID to SOD represents which of the following? | Magnification ratio
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| Tube angulation will produce which type of distortion? | Elongation
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| Magnification distortion can be used to an advantage for which of the following radiographic procedures? | Cerebral angiography
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| Changing the shape of an object is called? | Distortion
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| An x-ray tube that is designed for magnification radiography is referred to as what? | A fractional focus tube
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| What factor can affect shape distortion? | X-ray tube angulation
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| What advantage is there to magnifying an object? | Small objects become visible
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| A misrepresentation of the shape of an object may be caused by? | An angled object, an angled x-ray tube, or an angled cassette
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| What would not be used to minimize radiographic distortion? | Shortest possible exposure time
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| To avoid shape distortion, what must be paid close attention to? | Part angulation
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| How does magnification affect radiographic quality? | Decreases detail
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| Which of the following will produce the largest image? | 40" SID, 3" OID
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| If the SID is increased the same as the OID, what will the resultant radiograph show? | An increase in size distortion
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| Size distortion is affected by? | Geometric factors
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| What can be done to help compensate for an angled part? | Align tube, part and film
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| What is the magnification factor if an object measures 4 cm, but the radiographic image is 8 cm? | 2x
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| What will occur when the OID is decreased? | The image is closer to actual size
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| Which of the following will produce the smallest image? | 72" SID, 2" OID
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| If the SID increases, how is distortion affected? | Distortion goes down
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| If the air-gap technique is used, how is distortion affected? | Distortion goes up
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| If the SOD increases, how is distortion affected? | Distortion goes down
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| If the phospor size increases, how is distortion affected? | It has no effect
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| If the grid ratio increases, how is distortion affected? | It has no effect
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| If the tube angle increases, how is distortion affected? | Distortion increases
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