principles facial bones Flashcards
Lateral facial bones
Right or left done based on ____
Ir
KVp mas
Position (3)
______ line perpendicular to film
Adjust the flexion of the patients neck so ____is equal with transverse axis of film parallel
Radiolucent pad under side of_____ to prevent rotation
respiration
Central ray
Direct cr perpendicular at lateral surface of ____( between ____ and _____ at ______(midway eam and nose)
Right or left done based on side of pain
8x10 length
KVp 70 mas 20
Standing/semiprone/ seated
Inter pupillary line perpendicular to film
Adjust the flexion of the patients neck so ioml is equal with transverse axis of film(parallel)
Radiolucent pad under side of mandible to prevent rotation
Suspend respiration
Central ray
Direct cr perpendicular at lateral surface of zygoma (1/2 between eam and outer canthus at zygomatic arch (midway eam and nose)
Facial bone routine
Lateral- side of pain
Waters( or modified)
Caldwell
Structures shown lateral facial bones
Lateral image of bones of ____ with left and right superimposed
Lateral image of bones of face with left and right superimposed
Evaluation criteria lateral facial bones
All facial bones in entirey with the _____ in the center
Almost perfectly superimposed mandibular _____
Superimposed _____ roofs
No rotation of _____ _____
All facial bones in entirey with the zygomatic in the center
Almost perfectly superimposed mandibular rami
Superimposed orbital roofs
No rotation of sella turcica
Waters method of facial bones
Projection
Ir
Tech:
____position patients ___ or ____
Head to midline to grid; rest tip of ____
Average patient will _____in away from grid
____ line forms ____degree angle plane of film; modified has ___oml angle
_____ line will be perpendicular to film
_____ plane is perpendicular _to plane
respiration
Central ray
Direct cr perp to exit ____
Parietoacanthial projection
8x10 length
Tech: 75-80 KVp. Mas 25
Pa position
Upright or prone
Head to midline to grid; rest tip of chin
Average patient will 3/4 in away from grid
Oml forms 37 degree angle plane of film; modified has 55 oml angle
(Mml) mento metal line will be perpendicular to film
Median sagital plane is perpendicular to plane
Suspend respiration
Central ray
Direct cr perp to exit acanthion
Structures shown on waters method(3)
Orbits
Maxillae
Zygomatic arches
Eval criteria waters method
Equal distance between lateral border of skull and ___ on each side
Petrous ridges should be seen just below maxillary ____
_____, ______ bones and ____should be demonstrated
If not enough extension of neck, petrous ridges will ______maxillary sinus
Too much extension of neck, petrous ridges will be seen considerably_____maxillary sinus
Equal distance between lateral border of skull and orbit on each side
Petrous ridges should be seen just below maxillary sinuses
Orbits, zygomatic bones and maxilla should be demonstrated
If not enough extension of neck, petrous ridges will superimpose lower maxillary sinuses
Too much extension of neck, petrous ridges will be seen considerably below maxillary sinuses
Caldwell for facial bones
Ir
3 position
Place patient forehead in _____position and ____on table
____ line perpendicular _ to film
_____ plane perpendicular to grid
Breathing-
Central ray
Cr ___ degrees to ____
8x 10 length
Erect, seated, or prone
Place patient forehead in pa position and nose on table
Oml perpendicular to film
Midsaggital plane perpendicular to grid
Breathing- suspend respiration
Central ray
Cr 15 degrees caudad to nasion
Eval criteria Caldwell facial bones
Frontal ____ and ____ bone demonstrated
Petrous ridges should fill _____
Anterior _____air cells
Frontal sinuses and frontal bone demonstrated
Petrous ridges should fill lower one thirds of orbits
Anterior ethmoidal air cells
Nasal routine
Lateral(both)
Waters
Lateral nasal bones
Ir
Sides done
_____ plane parallel
_____ line is perpendicular
Adjust flexion of neck so _______ line is parallel with transverse axis
Central ray
Direct central ray perpendicular to _____ and _____in inferior to ____
8x 10 cw
Righ and left
Median sagital plane parallel
Inter pupillary line is perpendicular
Adjust flexion of neck so infraorbitomeatal line is parallel with transverse axis
Central ray
Direct central ray perpendicular to bridge of nose 1/2 in inferior to nasion
Structures lateral nasal bones
Lateral nasal bones , showing detail of the side _____film and soft structures of nose
Lateral nasal bones , showing detail of the side nearer film and soft structures of nose
Evaluation criteria nasal lateral
No rotation of nasal bones and soft tissue
Anterior nasal _____and ______ suture
No rotation of nasal bones and soft tissue
Anterior nasal spine and frontonasal suture
Waters projection nasal bones
Ir
Shows:
3 ways
_______ plane perpendicular
Extend chin and rest
Adjust head so ____ line forms _____degree angle :_____degrees modified waters for _____ fracture
_____ line perpendicular
Central ray
Cr perpendicular to plane to exit at point midway ____ and _____
Collimate to nasal bones
8 x 10 lw
Shows: bony nasal septum
Erect, seated, prone
Midsaggital plane perpendicular
Extend chin chin and rest notable
Adjust head so oml forms 37 degree angle : 55 degrees modified waters for blowout fracture
Mentomeatal line perpendicular
Central ray
Cr perpendicular to plane to exit at point midway nasion and acanthion
Collimate to nasal bones
Image criteria waters nasal bones
____ seen w/o rotation
Bony nasal septum seen w/o rotation
