![]() By comparing the results for a tumor to that of normal brain tissue, it can sometimes help determine the type of tumor (or how quickly it is likely to grow), although a biopsy of the tumor is often still needed to get an accurate diagnosis. It measures biochemical changes in an area of the brain (displayed in graph-like results called spectra, although basic images can also be created). ![]() Magnetic resonance spectroscopy (MRS): This test can be done as part of an MRI. This can be very useful before surgery to help the surgeon plan an operation. Magnetic resonance angiography (MRA) and magnetic resonance venography (MRV): These special types of MRI may be used to look at the blood vessels in the brain. Special types of MRI can be useful in some situations: ![]() A contrast material called gadolinium may be injected into a vein before the scan to help see details better. MRI scans use radio waves and strong magnets (instead of x-rays) to make pictures. But they do not pick up the bones of the skull as well as CT scans and therefore may not show the effects of tumors on the skull. The images they provide are usually more detailed than those from CT scans (described below). MRI scans are very good for looking at the brain and spinal cord and are considered the best way to look for tumors in these areas. Doctors can often also get an idea about what type of tumor it might be, based on how it looks on the scan and where it is in the brain. These scans will almost always show a brain tumor, if one is present. Magnetic resonance imaging (MRI) and computed tomography (CT) scans are used most often to look for brain diseases. These tests use x-rays, strong magnets, or radioactive substances to create pictures of the brain and spinal cord. Your doctor may order one or more imaging tests. ![]() If the results of the exam are abnormal, you may be referred to a neurologist (a doctor who specializes in medical treatment of nervous system diseases) or a neurosurgeon (a doctor who specializes in surgical treatment of nervous system diseases), who will do a more detailed neurologic exam and may order other tests. The doctor will also check your brain and spinal cord function by testing things like your reflexes, muscle strength, vision, eye and mouth movement, coordination, balance, and alertness. If signs or symptoms suggest you might have a brain or spinal cord tumor, your doctor will ask about your medical history, focusing on your symptoms and when they began. If a tumor is suspected, tests will be needed to confirm the diagnosis. Brain and spinal cord tumors are usually found because of signs or symptoms a person is having. ![]()
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