Brain Scanning
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What is the full name for CAT scans
Computerised axial tomography scan
What passes through in a CAT scan
X-rays pass through and multiple beams are passed through the head at different angles
What kind of images do CAT scans produce
Grey scale images of brain structure
What kinds of things can be detected through a CAT scan
Brain tumours or damage from a accident
Does a CAT scan give information about brain function
No
Can CAT scans be dangerous
Yes,involves exposure to ionising radiation
What are some pros of a CAT scan
Quick to conduct,accurate,helps surgeons plan procedures which decreases procedure time
What is the full name for a PET scan
Positron emission tomography scan
What is injected in the patient in a PET scan
A radioactive nuclear tracer which attaches to glucose as the brain uses t as a form for energy
Where is the tracer absorbed in a PET scan
In the blood stream
What kind of task is given in a PET scan
A stimulating task is given
What happens as the glucose in used up in a PET scan
Radioactive atoms break down which emit positrons. The gamma rays are produced which the scanner observes
What colour is high concentration in PET scanning
High conc of gamma rays in high activity areas are warm/red colours
What colour is low concentration in PET scanning
Low of gamma rays in low activity areas are cool/blue colours
What can PET scans observe
Brain function/observe tumours and damage
What can researchers tell about PET scans
Positions of damage and the symptoms
Are PET scans invasive
Yes, it involves radioactive material but there is low risk because of the low levels of substance
Can PET scanning cause long term effects
Yes, if done too regularly
What is the full name of a fMRI scan
Functional magnetic resonance imaging
When were fMRI scans designed
1990
Do fMRI scans contain radiation
No
What do fMRI scans use to gather information
Blood flow