Detection of x-ray

5 important questions on Detection of x-ray

Why would you use an anti-scatter grid?

To get reduction in contribution of scattered radiation. =>poor quality image

What are different types of recording media?

1) x-ray film (obsolete)
2) film-screen combination
3) Image intensifier/ TV
4) digital recording media

When to use a x-ray film?

Dental x-ray.
Sharp image
Very insensitive
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What is a film screen combination? What is a disadvantage?

Luminescent screen (=fluorescent screen; scintillator): x-rays are aborbed and converted into light.

Disadvantage:
limited sharpness of images due to scatter of light in screens

What is the idea of a digital recording media?

Light is transformed in electric charge (scintillator). This is detected by a flat-panel detector. That consists of multiple blocks=> the size of the blocks differs with your goal, and determines the amount of pixels.

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