Preclinical imaging is like taking pictures of animals before doing any experiments on them. Just like when you go to the doctor and they take a picture of your bones or organs with an X-ray or MRI, scientists use special machines to take pictures of animals' insides to see what their body looks like and how it works.
These machines include X-ray machines, CT scanners, MRIs, and PET scanners. X-rays take pictures using radiation, CT scanners use X-rays to create detailed 3D images of the animal's body, MRIs use powerful magnets to create images of the animal's body, and PET scanners map the animal's body and show how different parts of it work.
Scientists use these images to learn more about animals and how their bodies work. They can also use the images to test new drugs or treatments before testing them on humans. Preclinical imaging is important because it helps scientists understand how diseases and treatments affect animals, which can help them develop better treatments for humans.