introduction to radiography Flashcards
can you get routine radiographs
no! referrer has to have a justification
dense structures show as
white/opaque
not dense structures show as
black areas
what is final shadow of an object is affected by
- Type of material
- Thickness/density of material
- Shape
- Intensity of x ray beam
- Position in relation to x ray beam
- Sensitivity of the film
what can you see of normal anatomy on a radiograoh
auditory meatus orbits TMJ joints Paranasal sinus Hard palate Styloid process Hyoid bone Cortical bone
where is the Y line of Ennis
anterior wall of maxillary sinus and floor of nasal cavity
air shadows in a radiograph
nasal cavity nasopharynx glossopharynx oropharynx EA canala
soft tissue shadows
soft palate dorsal of tongue pinna epiglottis posterior pharyngeal wall
hard structures you can see
articular eminene glenoid fossa anterior arch of c1 styloid process body of c2 hyoid bone hard palate ID canal
ghost shadow
can be cast from an object e.g. earing
the one on the left is from the right (throws the image across)
processing faults on wet film
brown image
splashes during processing
digital phosphor plates
reusable
x ray excites the phosphor plate by light emission
- can get line atrifcats by scratching the surface
cementoma
extra cementum creates a radiolucent area
ameloblastoma
arises from ameloblasts
multi lobular appearance (soap bubble)
well defined
displacemts of teeth
advantages and disadadvanteges of CT scans
less invasive
pinpoint tumours
dis
can be claustrophobic in tunnel
more X-rays involved
side effects to liquid dyes
