Contrast, Resolution, and Visual Acuity in Images
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Questions and Answers

Which anatomical slice orientation is defined as feet to head?

  • Oblique
  • Coronal
  • Axial (correct)
  • Sagittal

What is the main difference between high contrast and low contrast in radiographs?

  • Low contrast enhances details better than high contrast.
  • High contrast shows more subtle differences in densities.
  • Low contrast has a narrower range of densities. (correct)
  • High contrast results in a darker image overall.

Which term refers to a slice orientation that is from left to right or right to left in anatomy?

  • Coronal
  • Oblique
  • Transverse
  • Sagittal (correct)

What does resolution in imaging refer to?

<p>The ability to differentiate between two adjacent structures (B)</p> Signup and view all the answers

Why does a higher atomic number lead to more attenuation in radiographic imaging?

<p>Higher atomic number means more electrons available to interact with X-rays, causing increased attenuation. (C)</p> Signup and view all the answers

Why is it challenging to distinguish tissues with similar densities and thickness when subject contrast is low?

<p>Low subject contrast causes tissues with similar densities to absorb X-rays equally, reducing their differentiation. (A)</p> Signup and view all the answers

In radiographic imaging, which tissue would allow the least amount of X-ray penetration due to its density?

<p>Bone (1.85 gm/cc) (D)</p> Signup and view all the answers

Why might it be necessary to administer a contrast agent when viewing tissues with low subject contrast?

<p>To highlight differences between tissues with similar densities. (A)</p> Signup and view all the answers

What is the primary difference between high contrast and low contrast in imaging?

<p>High contrast has fewer shades of grey, while low contrast has more shades of grey. (B)</p> Signup and view all the answers

How does the density or atomic mass of tissues affect contrast in imaging?

<p>Higher tissue density leads to low contrast, while lower density results in high contrast. (B)</p> Signup and view all the answers

What does visual acuity measure in relation to anatomical viewing?

<p>The eye's capability to distinguish shapes and object details at a specific distance. (A)</p> Signup and view all the answers

How does resolution impact the quality of images produced by devices?

<p>Higher resolution results in clearer images with more detail. (C)</p> Signup and view all the answers

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