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Skull Positioning

Facial Bones

What is the routine done for facial bones? Waters (parietoacantial), hard lateral, soft lateral, caldwell, SMV (zygomatic arches)
Where does the CR exit on the waters facial bones? Exits the acanthion
What is the patients position for the waters facial bones? patient is prone or seated. Chin rested on table. MML perpendicular. OML forms 37 degree angle to film
If positioning for the waters facial bones is correct, the OML will form a _____ angle to film. 37 degree
What is demonstrated in the waters facial bones? Petrous ridges below maxillae, orbits, maxillae and zygomatic arches
What is the difference between the hard lateral and soft lateral facial boens? Hard lateral we are demonstrating all the sinuses and in the soft lateral we are demonstrating the soft tissue of the nasal bones, nasion and acanthion
Where does the CR enter for the hard/soft lateal facial bones? Enter perpendicular to lateal surface of zygoma
Which line is perpendicular and which is parallel to the film in the lateral facial bones? IPL perpendicular, IOML parallel (MSP horizontal)
What kind of technique is used for the soft lateral facial bones? manual technique, table top 55@ 2.5 (finger technique)
Describe the patients position for the SMV zygomatic arches. Patient is supine or upright, extend neck back, IOML parallel to film
Describe the entrance of the CR for the SMV zygomatic arches. Perpendicular to IOML, Passing midway through zygomatic arches.
Zygomatic arches free from overlying structures, Zygomatic arches symmetric and without forshortening and no rotation of head. This is what is demonstrated in what projection? SMV zygomatic arches
In this view the patient is placed PA (preferred) with the OML perpendicular, MSP perpendicular. CALDWELL
CR is angled ___ degrees ____ exiting the ____ in the Caldwell Facial bones. 15, caudal, nasion
If the patient is unable to be placed in the PA caldwell, what can be done? AP caldwell
What is the major difference between the AP caldwell and PA caldwell facial bones? the angle of the central ray (PA - caudal; AP - cephalic)
In the PA caldwell where are the petrous ridges? Lower 1/3 of the orbit
Created by: sr4095