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Contrast, Resolution, and Visual Acuity in Images

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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?

The ability to differentiate between two adjacent structures Signup and view all the answers

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

Higher atomic number means more electrons available to interact with X-rays, causing increased attenuation. Signup and view all the answers

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

Low subject contrast causes tissues with similar densities to absorb X-rays equally, reducing their differentiation. Signup and view all the answers

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

Bone (1.85 gm/cc) Signup and view all the answers

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

To highlight differences between tissues with similar densities. Signup and view all the answers

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

High contrast has fewer shades of grey, while low contrast has more shades of grey. Signup and view all the answers

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

Higher tissue density leads to low contrast, while lower density results in high contrast. Signup and view all the answers

What does visual acuity measure in relation to anatomical viewing?

The eye's capability to distinguish shapes and object details at a specific distance. Signup and view all the answers

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

Higher resolution results in clearer images with more detail. Signup and view all the answers