Computerized Tomography Scans (CT scans)
x-ray beam passed through the brain at many different angles to create many different images
Magnetic Resonance Imaging (MRI)
produces static, 3D brain image
How does an MRI work?
- passing strong magnetic field through brain.
- radio wave through brain
- measures radiation emitted from hydrogen atoms
What does the contrast in an MRI depend on?
the denisty of hydrogen in the area
Diffusion Tensor Imaging (DTI)
detects directional movements of watermolecules to image nerve fiber pathways in the brain/shows abnormalities in the neural pathways
Functional Brain Imaging (FMRI)
when brain region is active, the amount of blood, oxygen, and glucose flowing to the region increases. alters the magnetic properties of water in the blood
Resting State MRI (rs MRI)
measures an always active brain in its state of rest. infer brain function and activity by studying FMRI signals when brain is at rest
Positron Emission Tomography (PET scans)
imaging technique that detects changes in blood flow by measuring changing in the uptake of compounds such as oxygen or glucose. injected into blood, used to analyze metabolic activity of neurons
