w1 - imaging Flashcards
describe plain radiograph (x-ray)
2D images formed via x-rays. dense objects appear bright
describe CT scan
3D images formed via x-rays. dense objects appear bright
describe MRI
3D images formed via magnetic materials.
what are the 2 types of MRI weighting?
T1-weighted: fat appears bright
T2- weighted: water appears bright
describe ultrasound
2D or 3D images formed via ultrasound waves. dense objects appear bright.
describe videofluroscopy
2D images formed via ionising radiation. dense structures appear bright.
advantages of plain radiograph
quick
low expertise required
cheap
accessible
disadvantages of plain radiograph
2D image
low resolution and quality
radiation is used
advantages of videofluroscopy
real-time images
quick
low expertise required
cheap
accessible
disadvantages of videofluroscopy
2D image
radiation is used
advantages of CT scan
3D image
deep view, high resolution and quality
quick
accessible
disadvantages of CT scan
high radiation exposure
high expertise required
advantages of MRI
3D image
deep view, high resolution and quality
no radiation used
disadvantages of MRI
inaccessible
slow
expensive
high expertise required
claustrophobia
advantages of ultrasound
real-time image
dynamic
cheap
quick
no radiation exposure
disadvantages of ultrasound
low resolution and quality
only superficial structures
high expertise required
3 types of plain radiography
anterior-posterior view
lateral view
oblique/special view
1 type of videofluroscopy
modified barium swallow (MBS)
2 types of CT scan
with contrast
without contrast
