|
Neuro-Oncology University of Washington Medical Center |
||
|
Back to Table of Contents |
About Brain Tumors:
Diagnosis of Brain Tumors Brain tumors can be detected by using a variety of special diagnostic tests. Two of the more commonly used tests are the CAT or CT (computerized axial tomography) scan and the MRI (magnetic resonance imaging) scan. Both methods provide detailed pictures of the brain. The CT scan uses x-rays and a computer to reconstruct images of the brain. An MRI is not an x-ray. It uses magnetic fields, radio waves, and a computer to reconstruct images of the brain. An MRI provides clearer and more detailed pictures of the brain but sometimes a CT scan is preferred. Both the CT scan and the MRI may be done using a contrast agent. A contrast agent, when injected by vein (intravenous), will make some types of tumors, appear brighter than the surrounding brain structures on the scan. Your physician or nurse can discuss what to expect during these procedures. Pamphlets describing the procedure are also available from the Radiology Department.
|