MEDICINE
RADIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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target size
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target-to-film distance
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object-to-film distance
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none of the above
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Detailed explanation-1: -A decrease in object–film distance results in a decrease in magnification, and an increase in object–film distance results in an increase in image magnification.
Detailed explanation-2: -The magnification produced by a lens is equal to the ratio of image distance to the object distance.
Detailed explanation-3: -Increasing source-to-object distance only will decrease the magnification of the radiographic image. Decreasing source to object distance only will increase the magnification of the radiographic image (Figure 9).
Detailed explanation-4: -Increasing source to object distance only will result in a increase in magnification of the radiographic image.
Detailed explanation-5: -Structures the beam hits first will be magnified in relation to those which are nearer the detector. To reduce magnification the X-ray source can be moved further away from the subject. Structures that need to be measured accurately should be placed closer to the detector.