RADD 2501 Animal Insides Lecture - The Production of X-Rays

RADD 2501 Animal Insides Lecture - The Production of X-Rays...

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Lecture 2 Lecture 2: The Production of X-rays In this Lecture : ¾ What x-rays are ¾ Learn the components of an x-ray tube ¾ Learn how x-rays are produced. ¾ Understand the line focus principle ¾ Understand why an anode rotates ¾ Understand the heel effect ¾ Understand how x-ray generators work ¾ Understand what line voltage compensation is and why it is important S o here we go. Into the wild, wonderful word of radiation physics. It’s really not that bad and you wont have to learn lots of equations like you did in physics class in college. This stuff really is important because you can use it in every day practice. Think of it as the “scales” of radiology. Those of you who play an instrument know how boring learning scales were; but you also realize that knowing those scales let you play any type of music. Without a working knowledge of scales, all you know is how to play a few songs. You really don’t know how music works. The same goes for radiology. You can take radiographs all day long but without knowledge of how x-rays are produced, how the tube works, and what all of the accessory equipment does you will have no idea how to make a radiograph better if it comes out crummy. The next 6 lectures will give you the tools to create a perfect radiograph every time. X-rays: The core of radiology Definition: X-rays are a form of electromagnetic radiation traveling through space as a combination of electric and magnetic fields. Radio waves, television waves, microwaves, and light are other forms of electromagnetic radiation. X-rays have a number of useful physical characteristics that allow us to utilize them for out benefit:
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X-rays can penetrate matter. This allows us to “see through” things. Not all materials are penetrated equally. This allows us to see different tissues in an image. X-rays also interact with matter, which causes biological alterations (ionization) at the molecular level. This of course is not always beneficial as x-rays can be damaging. More on this later. X-rays cause certain materials to fluoresce (give off light) which enables is to record an image. When interacting with matter, x-rays follow many of the same physical principles as light. Such as: o X-rays act like waves when traveling through space. o X-rays act like particles when interacting with matter o X-rays travel in straight lines. Therefore, x-rays cannot go around corners. o X-rays diverge from a point source. You will see why this important when we discuss radiographic image formation o X-rays obey the inverse square law. You will see why this is important when we discuss radiation safety. . o X-rays are not affected by magnetic fields. Therefore, they cannot be focused or steered. o X-rays travel at the speed of light.
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This note was uploaded on 11/22/2011 for the course RADD 2501 taught by Professor Sandyeverage during the Winter '11 term at Life Chiropractic College West.

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RADD 2501 Animal Insides Lecture - The Production of X-Rays...

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