Unit 2 Post Exam Questions (Lots of math & study stack)

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Last updated 7:27 PM on 4/30/26
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14 Terms

1
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What is the scientific term for the blurriness of image edge?

Penumbra

2
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The abruptness of image edges is termed as:

Sharpness

3
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What is the equation for SID?

SID = SOD + OID

4
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The measured width of the penumbra, or the “spread of blur” :

Unsharpness

5
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What is the source to object distance called?

SOD

6
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Which would make the best resolution on an image?

Smaller Pixels, Bigger Matrix

7
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What is the increase in the size of both axes of an image by equal proportions? (Same Shape)

Magnification

8
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The length of the image that measures longer than the real object: (angle)

Elongation

9
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The length of the image that measures shorter than the real object: (object not parallel to IR)

Foreshortening

10
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What are the three things visibility requires?

  • brightness

  • contrast

  • noise

11
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What are the 3 factors of recognizability?

  • sharpness

  • magnification

  • shape distortion

12
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low kVp gives us a ___ wavelength

longer

13
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high kVp gives us a ____ wavelength

shorter

14
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Which of the following are factors that would lead to image noise?

  • low beam penetration (kVp)

  • low beam intensity (mAs)

  • thick or dense anatomy