The majority of brain aneurysms never cause health problems; because of that, many go undiagnosed. Brain aneurysms typically are discovered only after a rupture, when the unruptured aneurysm is causing head pain, or when someone is undergoing tests for another condition. There are four main tests that can detect a brain aneurysm.
- Angiography (also referred to as a cerebral angiogram) is a test in which dye is injected in the body. As the dye travels through veins and arteries, x-rays are taken and analyzed to determine the site of the aneurysm.
- A computed tomography (CT) scan provides a detailed x-ray of the head that shows images of the brain and skull layer by layer.
- A Magnetic resonance imaging (MRI) is another way to capture an image of the brain in detail.
- Cerebrospinal fluid analysis is a test in which fluid is extracted from the space between the spinal cord and surrounding membrane and is tested for signs of bleeding or hemorrhage.