Inflammation of one or more of the paranasal sinuses
What is sinusitis?
100
For a waters projection:
_____ forms an angle of 37 degrees with the plane of the IR
_____ and ____ are perpendicular to the IR
What is OML, MML, MSP?
100
CR: Perpendicular to exit the acanthion
(Projection and applicable body part(s))
What is Waters projection? (sinuses, facial bones, nasal)
100
In lateral projections of the skull, sinuses, and facial bones visualization of these superimposed indicates proper positioning
What is the sella turcica seen in profile and superimposed orbital roofs, TMJ, EAM, and mandibular rami?
100
A PA axial projection of the cranium shows the distance from the lateral border of the skull to the lateral border of the orbit to be greater on the right side than on the left. The required correction is
What is rotate the patients face towards the right side until the midsagittal plane is perpendicular to the IR?
200
Dysfunction of the temporomandibular joint
What is TMJ syndrome?
200
For Caldwell projections of the cranium and facial bones:
____ is perpendicular to the plane of the IR
____ is perpendicular to the IR
What is OML, MSP?
200
CR: horizontal to the IR exiting the nasion
What is Caldwell projection of the sinuses?
200
The crista galli is best visualized in this projection
What is Caldwell?
200
In a PA axial projection of the facial bones the petrous ridges are demonstrated inferior to the infraorbital margins. The required correction is
What is tuck the patients chin to bring the OML perpendicular to the IR?
300
The most common site of a facial fracture
What are the nasal bones?
300
For a submentovertical projection:
____ is parallel with the plane of the IR
____ is perpendicular to the plane of the IR
What is IOML, MSP?
300
CR: 30 degrees caudad entering 2.5" above the glabella passing through the level of the EAM
What is AP axial (Townes) projection of the cranium?
300
Visualization of this is a key compontent to a properly positioned AP axial projection(Towne) of the skull
What is the dorsum sellae and posterior clinoid processes visible within the foramen magnum?
300
In a lateral projection of the sinuses the orbital roofs, the EAMs, and anterior clinoid processes are demonstrated with one of each structure demonstrated superior to the other. The required correction is
What is adjust the tilt of the patient's head to place the midsagittal plane parallel to the IR and the IPL perpendicualr to the IR?
400
A linear fracture that intersects a suture and courses along it, causing sutural separation
What is a Diastatic fracture?
400
For lateral projections:
_____ is parallel to the plane of the IR
_____ is parallel to the transverse axis of the IR
_____ is perpendicular to the IR
What is MSP, IOML, IPL?
400
CR: perpendicular entering the lateral surface of the zygomatic bone halfway between the outer canthus and EAM
What is the lateral projection of the facial bones?
400
There are two main reasons a non-grid technique is recommended for foreign body orbits
What is to reduce magnification and to eliminate possible artifacts in or on the table, upright bucky, and grid?
400
In a Waters projection of the facial bones the petrous ridges are demonstrated within the maxillary sinuses. The required correction is
What is elevate the patient's chin until the MML is perpendicular to the IR?
500
Often stellate (star shaped) with multiple fracture lines radiating outward from a central point
What is a Depressed fracture?
500
For a tangential projection:
____ is parallel with the plane of the IR
____ is rotated approximately 15 degrees ____the side being examined
The top of the head is tilted approximately 15 degrees ___ from the side being examined
What is IOML, MSP, toward, away?
500
CR: angled 25 or 30 degrees caudad entering about 1/2 inch anterior and 2 inches superior to upside EAM?
What is the axiolateral projection of the TMJ?
500
In axiolateral and axiolateral oblique projections of the mandible the patient's head is rotated differing amounts to achieve this
What is to place the area of interest parallel to the IR?
500
In an AP axial projection of the cranium the dorsum sellae is foreshortened and is superimposed over the atlas's posterior arch. The required correction is
What is elevate the patient's chin until the OML is perpendicular to the IR?