Anatomy Basics
This sinus is the largest and most symmetrical.
What is the maxillary sinus?
For a lateral skull, this line must be perpendicular to the IR.
What is the interpupillary line (IPL)?
This projection best demonstrates the maxillary sinuses.
What is the Waters method?
On a lateral skull, these structures should be superimposed if there is no rotation.
What are the orbital roofs?
Sinus examinations should be performed upright to demonstrate this finding.
What are air-fluid levels?
The sternum consists of these three parts.
What are the manubrium, body, and xiphoid process?
The patient is rotated this amount for an RAO sternum.
What is 15–20 degrees?
This skull projection demonstrates the cranial base.
What is the SMV (Schüller) projection?
On a Caldwell projection, the petrous ridges should appear in this part of the orbit.
What is the lower third of the orbit?
This is the most effective method of radiation protection during skull and sinus imaging.
What is close collimation?
There are this many pairs of ribs in the human body.
What are 12 pairs?
For an SMV skull projection, this line is parallel to the IR.
What is the IOML?
This projection demonstrates the occipital region and foramen magnum.
What is the AP Axial Towne method?
On an RAO sternum, the sternum should be projected over this structure.
What is the heart shadow?
The sphenoid sinus is best demonstrated on this projection.
What is the lateral sinus projection?
These bones contain the sphenoid sinuses.
What is the body of the sphenoid bone?
For a Waters sinus projection, the OML forms this angle with the IR.
What is 37 degrees?
This rib projection best demonstrates axillary ribs.
What is the AP oblique rib projection?
On an SMV projection, the mandibular condyles should be located ________ to the petrous pyramids.
What is anterior?
The xiphoid process lies over this vertebral level.
What is T10?
The skull is composed of this many cranial bones and this many facial bones.
What are 8 cranial bones and 14 facial bones?
For the Towne method, the neck is flexed until this line is perpendicular to the IR.
What is the OML (or IOML)?
This projection primarily demonstrates the frontal sinuses and anterior ethmoid air cells.
What is the PA Axial (Caldwell) projection?
On a Towne projection, the dorsum sellae and posterior clinoids should appear within this structure.
What is the foramen magnum?
Name all four groups of paranasal sinuses.
What are the maxillary, frontal, ethmoid, and sphenoid sinuses?