Brain Imaging

Question 0

CT scan or CAT Scan

Answer 0

Computerized Axial Tomography.

Series of x-rays of the head are taken from many different directions. Useful for quickly assessing brain injuries.

Question 1

EEG

Answer 1

Electroencephalogram

Electrodes on the scalp record brain waves. Unusual activity may indicate brain disorders.

Question 2

MRI

Answer 2

Magnetic Resonance Imaging

Yields a more detailed, 3-d image. Allows precise mapping of the physical shape of the brain.

Question 3

fMRI

Answer 3

Functional Magnetic Resonance Imaging.

Uses changes in blood flow to generate images that show brain activity and performance.

Question 4

MEG

Answer 4

Magnetoencephalograph

Magnetic sensors placed on the skull reveal neural activity with little interference from other structures. Used to locate tumors and to determine functions of brain parts.

Question 5

PET

Answer 5

Position-Emission Tomography

Radioactive isotopes injected into the brain are then tracked by a computer through the brain. Reveals blood flow, oxygen levels, and glucose metabolism.