Conditions like fluid imbalance or local swelling that lead to puffy or swollen eyelids can cause shadows that make the area under the eyes appear darker. Trauma (a black eye) can cause darkening of the entire eye area. Some people notice that dark circles under the eyes tend to run in families, as well. In most cases, dark circles under the eyes are not a sign of a serious medical condition.
A full-body scanner is a device that detects objects on a person's body for security screening purposes, without physically removing clothes or making physical contact. full-body scanner is a device that detects objects on a person's body for security screening purposes, without physically removing clothes or making physical contact.
Patients are injected with a radioactive tracer isotope combined with some form of glucose. After a short time, the scanners are able to detect gamma radiation produced by the tissues in the body that are interacting with the tracer isotope. PET scans create detailed images of the body. They can even detect changes in biological processes, allowing doctors to find the smallest tumors.