POM 02 - Imaging and radiology Flashcards
what are the 4 benefits of xrays
can be very informative
cheap
available
fast to acquire
what are the 4 downsides to xrays
superimposition of structures
poor soft tissue definition
radiation dose
need 2 views to locate lesions
what are the 4 benefits of CT scans
cross sectional imaging
moderately available
fast to acquire
can reformat
what are the 4 downsides of CT scans
poor soft tissue definition especially of the brain
radiation dose high
moderately expensive
what are the 4 benefits of MRI scans
no ionizing radiation
excellent tissue contrast and spatial resolution
ability to image in any plane
can provide true 3D images
what are the 5 downsides of MRI scans
low availability
longer imaging time
high cost
contraindications - pacemakers, claustrophobia, metals
need to keep still
what are the 6 benefits of ultrasound scans
no radiation
widely available
inexpensive
easy to use
ability to image in any plane
portable
what are the 4 benefits of ultrasound scans
longer imaging time
low resolution
operator dependent
obstructed by bone and air
