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The object which captures to create an X-ray image is what is called as

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image intensifier, and there is also newer is flat panel

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detector.

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Image receptor is the cylindrical tube sitting on top, focused towards

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the X-ray tube, which captures the X-rays, converts into light

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and the signal, and create an image. Simultaneously, you can see the image so fast.

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A typical image intensifiers are usually nine

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inch of II. This is what most of the mobile arm of a

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nine-inch II is nine-inch diameter image

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receptor.

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The way if you open up this particular cylinder, you can see here the outer

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side is the point which sees the patient,

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has a screen diameter ranging from 15 to 40 centimeter

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in diameter here. It can be small to large.

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However, the output screen is still one and a half to three

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centimeter, a small focal spot, the smaller output area.

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The schematic diagram or principle behind image intensifier is

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as follows.

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When X-rays hit the image receptor, here image intensifier,

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the front end of the window has a what is called as

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input phosphor. The input phosphor converts X-rays

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into light. That is very important.

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And the light, when they interact with this photocathode

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material, that converts the light into electrical

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signal,

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and that's what these electrons are.

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These electrons are negatively charged, and they begin to get

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attracted towards the anode, which is the positively charged output phosphor,

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which is positively maintained at a higher positive tube voltage.

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In between, you also have what is called as dynodes, which

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basically functions at to focus the X-rays

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towards the output phosphor rather than strain, the remaining

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strain. And once the light signal hits the photocathode, the

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output window, that converts that electrical signal into

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light, the photons and the light photon is then transported towards

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output window into a TV camera or to a computer,

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everything.

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So the principle behind this like in image intensifier,

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X-rays are converted into light.

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Light are then converts into electron, which are photoelectrons,

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and these photoelectrons will result in a light signal at the

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output phosphor. And that light, it can be directed into

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multiple spots through and create a video signal, either a

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TV or into another format, recording device, and so

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forth.