Have you ever had an x-ray? They’re commonly used to see broken bones. White areas show where denser tissues, such as bones, have absorbed the x-rays. Black areas on an x-ray represent areas where the x-rays have passed through soft tissues. Much like camera film, the X-ray film develops depending on which areas were exposed to the X-rays. Dense materials inside our bodies, like bones, absorb the radiation.
#XRAY MACHINE SKIN#
Soft tissue, such as skin and organs, cannot absorb the high-energy rays, and the beam passes through them. When x-rays come into contact with our body tissues, they produce an image on a metal film. To reduce radiation exposure, x-ray machines aim the x-rays at only the focus area. The x-rays made by this interaction are then directed toward the part of the body being examined. Today’s x-ray machines produce a stream of electromagnetic radiation that interacts with an anode in an x-ray tube. It took a long time for scientists to make the x-ray safe for medical use. An x-ray machine is like a giant camera that allows doctors to see what is going on inside a patient without having to do surgery. X-rays can pass through nonmetallic objects, including human tissues and organs. There’s no doubt the x-ray machine is very useful to doctors. Not only had Roentgen discovered x-rays, he saw firsthand ( pun intended!) how they could become extremely helpful to medicine. When he did this, he saw a silhouette of his bones projected onto the screen. No matter what he put between the two, the screen still glowed.Īt one point, Roentgen placed his hand in front of the tube. He began to experiment by placing different objects between the tube and the screen. Soon, Roentgen noticed that a fluorescent screen in his lab started glowing while he conducted his experiment. While he knew fluorescent material normally glows when exposed to electromagnetic radiation, he was still surprised because heavy cardboard, which he thought would have blocked the radiation, surrounded the tube. Human eyes cannot see light with longer wavelengths, such as radio waves, or light with shorter wavelengths, such as x-rays. The difference between visible light and x-rays is the wavelength of the rays. X-rays are a type of light ray, much like the visible light we see every day. What Roentgen didn’t know was that, when these fast-paced electrons bumped into the tube’s anode, they would send off a type of light that hadn’t yet been discovered. They also ran into the glass of the tube and two special parts of the tube called the cathode and anode. That allowed electrons to move at a very fast pace through the tube.Īs the electrons moved, they bumped into each other. For that reason, Roentgen removed as much air from the tube as possible. He wanted to find out how electricity would act in a vacuum. In 1895, German physicist Wilhelm Roentgen was experimenting with electricity in a special tube. What do penicillin, Super Glue and X-rays have in common? Their inventors all discovered them by accident!
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