Contrast materials can help highlight areas of interest in MRI scans. Contrast injections may cause side effects like mild rashes and hives, but, in rare instances, it is also possible for a person to ...

A PET scan can help doctors spot cancer that has spread through the body. A doctor may request one during the melanoma diagnostic process if they suspect advanced melanoma cancer. A PET scan is an ...

Positron emission tomography (PET) scans can detect cancer earlier than other imaging tests. But some types of cancer are harder to detect on a PET scan. In particular, they may miss cancers that ...

A computed tomography (CT) head scan uses X-rays to develop a 3D image of the skull, brain, and other related areas of the head. A CT scan of the head can provide more detail than a traditional X-ray, ...