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nasal bone

QuestionAnswer
Lateral patient position semiprone or seated erect
Lateral part position center nasion to cassette, adjust MSP parallel to cassette, IOML parallel to transverse axis of cassette
Lateral respiration suspended
Lateral central ray perpendicular to bridge of nose, entering 3/4in distal to nasion
Lateral shows bone nearest film and soft structures, both sides are examined for comparison
Lateral crit eval no rotation of nasal bone or soft tissue; anterior nasal spine & frontonasal suture
Where is the central ray for the Parietoacanthial (Waters) projection for Nasal Bones? CR perpendicular through the acanthion to MOF & MSP.
How is the patient positioned on the table for a Parietoacanthial (Waters) for Nasal Bones? Pt prone on the table, head resting on extended chin.
What positioning lines are used & how are they orientated to the film for a Parietoacanthial (Waters) for Nasal Bones? MSP & MML perpendicular to the film. OML forms a 37° angle with the film.
What is the direction & tube angle for a Parietoacanthial (Waters) for Nasal Bones? 0
What structures are best demonstrated for a Parietoacanthial (Waters) for Nasal Bones? Maxillary sinuses superior to petrous portions, bony nasal septum, deviated bony nasal septum.
PA Caldwell Patient prone, Patient positioned with forehead on table, O.M.L. perpendicular to plane of film, Angle 15o caudal, Central Ray: exits nasion
Created by: jen.
 

 



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