Avalon

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Avalon

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Thursdays from now to the end of the year are now officially designated as X Ray Day. This is the day I have my Radiography class & lab. I should do well in this one.

The instructor was going over all of the various controls on the X ray equipment and a lot of the class looked lost. X ray equipment is, of course, nothing new to me, what mainly made it different was the ability to focus it (not new to anyone whos used a real film camera) and adjust the power settings (not new to anyone with a basic knowledge of what an Ampere is).

Whats really new to me to learn here is the positioning of animals to get various shots based on what you are trying to learn from the Xray. That and all of the record keeping.
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vulpesrex September 8th, 2006
Alright, now I am curious...

How _DO_ you focus x-rays?

Do they use some kind of mechanical apparatus, like a collimator? or a shield with a "calibrated pin-hole"? is there some sort of actual control that manipulates a field, which can moderate or focus x-rays?

And how do you _know_ that the focus is where it ought to be? I guess that somehow, I'm picturing this as one would ordinary light, which can be observed directly on a backplane...do they still use flouroscopes, by the way, or are those now obsolete, or banned as dangerous?

Actually, you can't

titanic September 19th, 2006
The machines are all pre-focused at about a 40" distance, whcih is pretty much standard for any X-ray regardless of purpose. If you are doing say a leg of a horse or somthing - you position the film plate behind the leg on an easel or have some poor schmuck hold it while you shoot with a portable unit.

Obviously a chest X-ray on a horse is not something that can be done with standard equipment - and both the equipment required (which I have never seen) and the dose needed to get through all that make it a rare event indeed.

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