Imagine you are going to the doctor for an X-ray or an ultrasound. The machine they use takes special pictures of your insides to help the doctor figure out what might be wrong. While these pictures can be helpful, they also use something that can be harmful to your body, called radiation.
Radiation is made up of little bits called "particles" that are too small to see. These particles can move really fast and can pass through some things like walls, clothing, and even your body. When these particles pass through your body, they can hurt the tiny parts that make up your cells.
To protect you from the harmful effects of radiation, the doctors and technicians who operate these machines use something called "radiological protection". This means they take special steps to keep you safe while getting the pictures you need.
One way they do this is by only using the machine for as long as necessary to get a good picture. This reduces the amount of radiation you are exposed to. Sometimes they might use special shields, like lead aprons or screens, to cover parts of your body that might be more sensitive. They might also use special techniques to take the picture in a way that exposes you to less radiation.
It's important to remember that while radiation can be harmful, the doctors and technicians are trained to use the machines safely to get you the best treatment possible. And if you ever have any questions or concerns about getting one of these tests, you can always ask the doctor or technician for more information.