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6 Cards in this Set

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What is a CT scan?

A computerised tomography scan combines a series of x-rays through computerisation to create cross-sectional images of the body/brain.

What is a PET scan?

A positron emission tomography scan is an imaging test which is used to check for diseases. The scan requires a special dye with radioactive tracer, which can be swallowed, inhaled, or injected depending on where is being examined.

What is an fMRI scan?

functional magnetic resonance imaging scans measure and map brain activity. This scan is noninvasive as it uses strong magnetic fields and radio waves to image the brain. Functionally identical to an MRI, but activities can be performed during the scan.

What are the pros and cons of CT scans?

+ reveals abnormalities


+ high quality


- uses more radiation than regular X rays


- gives less information than other scan techniques

What are the pros and cons of PET scans?

+ shows brain activation


+ shows localisation of function


- extremely expensive


- hard to interpret


- ethical issues with injecting radioactive glucose tracers, can only be done so many times.

What are the pros and cons of fMRI scans?

+ shows which areas are being used


+ no radiation, very safe


+ good quality images


- as expensive as PET


- only effective if the person stays perfectly still; a problem for children & some people