CH4.3 Flashcards
Neuroimaging Techniques
procedures and devices that are used to take scans of the brain, providing information about the brain’s structure and function
What are neuroimaging techniques used for?
provide more information
regarding brain injury or damage, including location and severity
What are the two categories of Neuroimaging?
Structural and functional
Structural neuroimaging
captures what the brain looks like
Includes:
- Computerised tomography (CT SCAN)
- Magnetic Resonance Imaging (MRI SCAN)
Functional neuroimaging
provides information on brain activity
Includes:
- Positron emission tomography (PET)
- Functional magnetic resonance imaging (fMRI)
CT scan
Computerised tomography:
- Structural neuroimaging
- Uses X-rays to take images of brain
How do CT scans work?
STRUCTURAL
1. ingesting dye that goes through the blood stream
2. patient goes through donut looking scanner
3. scanner spirals around the patient taking numerous 2D pictures to for 3D ones
MRI scan
Magnetic resonance imaging:
- Structural imaging
- Uses magnetic and radio fields to take pictures of brain
How do MRI scans work?
STRUCURAL
1. patient lays on bed that slides into chamber device that is made of large magnetics
2. Atoms in water molecules are used to provide images that can be turned into images
(clearer and more detailed then CT scan)
PET scans
Positron emission tomography
- Functional neuroimaging
- Colored images of brain
How do PET scans work?
FUNCTIONAL
1. injecting radioactive glucose that enters blood stream -> brain
2. patient lies there and performs task
3. scanner takes images of brain when doing certain task
fMRI
Functional magnetic resonance imaging
- Functional neuroimaging
- Colored images that shows levels of brain activity
How do fMRI work
FUNCTIONAL
1. Uses magnetic and radio fields to show images
2. detects oxygen use thus leading to more active region of brain
