Exam 11: Cranium, Facial Bones, and Paranasal Sinuses

A radiograph of a submentovertex projection reveals that the mandible is superimposed over the ethmoid and sphenoid sinuses.Which of the following modifications will eliminate this problem?

A patient comes to radiology with a history of a possible erosion of the superior orbital fissures.Which of the following projections would best demonstrate this structure?

A patient enters the ED with facial bone injuries.The physician is concerned about a possible blow-out fracture of the left orbit.Which of the following three-projection routines would best diagnose this injury?

Where should the optic foramen be located with a well-positioned parieto-orbital oblique projection of the optic foramina?

The widest portion of the cranium is found at the level of the:

The oval window is labeled:

The aditus is defined as a(n):

MATCHING Select the imaging modality that would best demonstrate the following pathologies. -Craniosynostosis (premature suture closing in neonate skull)

Which of the following bones is part of the floor of the cranium?

Part 3 is part of which bone?

The modified Law method for TMJs requires a ____ rotation of the skull and a ____ angle of the CR.

Which of the following projections will best demonstrate the bony nasal septum?

A radiograph of a posteroanterior (PA)axial projection (Caldwell method)of the cranium reveals that the petrous ridges are located at the level of the lower one third of the orbits.The technologist performed this projection with the CR angled 15° caudal to the orbitomeatal line (OML).How must positioning be altered if a repeat exposure is performed?

The lateral projection for the nasal bones is generally a unilateral projection.(Both right and left lateral projections are usually not required.)

A radiograph of a submentovertex projection of the cranium reveals that the mandibular condyles are projected into the petrous pyramids.What must be altered during the repeat exposure to produce a more diagnostic radiograph?

Lesions of decreased density are termed osteoblastic lesions.

Which projection will best demonstrate the entire mandible with one exposure?

Which sinus often produces an air/fluid level indicating a basilar skull fracture?

What can the technologist do if the patient cannot extend the head and neck adequately for the routine submentovertex projection of the zygomatic arches?

The modified parietoacanthial (modified Waters)projection requires more extension of the head and neck as compared with the parietoacanthial (Waters)projection.