Exam-style question
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How does the differential absorption of X-rays by different tissues affect the resulting image?.
- A.It creates a uniform image with no contrast.
- B.It allows for varying shades of gray to represent different tissue densities.
- C.It enhances the brightness of all tissues equally.
- D.It eliminates the need for contrast media.
Model answer
What a good answer should say
- It allows for varying shades of gray to represent different tissue densities.
Explanation
Why this works
Differential absorption occurs because different tissues have varying densities and atomic compositions, leading to different levels of X-ray absorption. This results in an image with varying shades of gray, which helps in identifying different structures within the body.
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