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Radiography Knowledge Quiz

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Questions and Answers

Which type of contrast is associated with long scale in medical radiography?

High contrast
Soft tissue contrast
Low contrast (correct)
Metallic contrast

What is the primary controlling factor for contrast in medical radiography?

Focal spot size
mAs
kVp (correct)
SID

What is the most radiolucent (blackest) radiographic density?

Fat
Water (soft tissue)
Bone
Air (correct)

What is the primary controlling factor for contrast in medical radiography?

kVp (C) Signup and view all the answers

What is the principial advantage of a high speed rotating anode?

More efficient heat dissipation (A) Signup and view all the answers

Which is the most radiolucent (blackest) radiographic density?

Air (D) Signup and view all the answers

Flashcards

Low Contrast

A type of contrast that produces a greater range of shades of gray (more detail) on a radiographic image. Often associated with longer scales in medical radiography.

High Contrast

A type of contrast that produces a smaller range of shades of gray (less detail) on a radiographic image. Often associated with shorter scales in medical radiography.

What controls contrast?

The kilovoltage peak (kVp) is the primary controlling factor for contrast in medical radiography. It determines the energy of X-rays, which directly impacts the amount of penetration and the resulting contrast.

Which density is most radiolucent?

Air is the least dense material and allows X-rays to pass through with the least attenuation. This results in the darkest (blackest) appearance on a radiographic image.

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What's the benefit of a high-speed anode?

A high-speed rotating anode is designed to dissipate heat more efficiently. This allows for a greater number of exposures before the anode overheats and needs to cool down.

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Radiolucent vs. Radiopaque

Radiolucent materials allow X-rays to pass through more easily (less attenuation), resulting in a darker appearance on a radiographic image. Materials that absorb more X-rays are called radiopaque and appear lighter on the image.

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