Doctors may not be able to read your mind. But, using the latest technology, they can take a good look at your brain.

Today's sophisticated imaging tests allow physicians to analyze the living brain and spine as never before, helping them to diagnose tumors, strokes, and other neurological disorders. Here's a look at some of the most commonly used tests.

MRI (Magnetic Radiation Imaging)
PET (Positron Emission Tomography)
CT (Computed Tomography, or CT Scan)
If You Need a Test
About Dr. Brinkman

MRI (MAGNETIC RADIATION IMAGING)

Used for:
Detecting multiple abnormalities of the central nervous system. The images acquired with this modality often are essential for diagnosis and effective treatment planning.

How it works:
Radio waves and a strong magnetic field create clear, detailed pictures of the brain. The test not only helps physicians see the anatomy of the brain but can help them see how the brain is handling important functions such as movement, thought, speech and sensation.

How long does it take?
15 to 45 minutes

PET (POSITRON EMISSION TOMOGRAPHY)

Used for:
Detecting brain tumors and evaluating people with memory or seizure disorders.

How it works:
Tiny particles (positrons) emitted from a radioactive substance are injected into the patient. The positrons are used to produce images that reflect metabolic activity. Because of potential differences in the level of metabolic activity, PET imaging can help differentiate between normal and abnormal brain tissue. The radioactivity in the substance is very short-lived, and exposure is low. However, women who are pregnant should discuss risks of the test with their doctors.

How long does it take?
30 to 45 minutes

CT (COMPUTED TOMOGRAPHY, OR CT SCAN

Used for:
Detecting bleeding, skull fractures, blood clots that cause stroke and brain tumors. This test is the first line of imaging for emergent neurological disorders and is sometimes used to plan radiation therapy or biopsies of the brain.

How it works:
X-ray equipment is used to rapidly acquire multiple images from different angles. A computer then reconstructs these images into detailed cross-sectional images of the brain.

How long does it take?
2 to 20 minutes

IF YOU NEED A TEST

All of these tests are performed with devices that look like large cylinders, which contain the scanning equipment. You lie still on your back inside the cylinder as the machine takes images.

Some people may feel nervous or claustrophobic during the tests. However, this usually isn't a serious problem.

If you have questions or concerns about any of these tests, be sure to speak to your doctor.

Source: Radiological Society of North America

About Dr. Brinkman
Among a handful of radiologist specializing in neuro (brain) imaging in the area, Dr. Brinkman completed his advanced training (fellowship) as well as residency at the University of Washington. He is medical school graduate of the University of Illinois College of Medicine. He is a member of the Columbia Imaging Group, which includes eight other radiologists and interventionalists. The group works closely with Southwest Imaging Centers, both at the Medical Center and at the Fisher's Landing location.

You can locate a doctor to help you with radiology and neuroradiology on our Find a Doctor area.