chpt 13 facial bones and paranasal sinuses
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Created by:
saraapreston on March 30, 2011
Subjects:
Classes:
Radiology Ch.17 Upper GI and Lower GI Floroscopy
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52 terms
Terms | Definitions |
|---|---|
 Middle Nasal Conchae | Which one of the following bones is not a facial bone?-middle nasal conchae, vomer, lacrimal bone, or mandible |
| maxilla | what is the largest immovable bone of the face? |
| frontal, zygomatic, alveolar, palatine | list the four processes of the maxilla |
| frontal | which one of the four processes of the maxilla is considered the most superior? |
| acanthion | which soft tissue landmark is found at the base of the anterior nasal spine? |
| horizontal portion of the palatine bone | which facial bones form the posterior aspect of the hard palate? |
| frontal and ethmoid | which cranial bones articulate with the maxilla? |
| zygomatic or malar bones | which facial bones are sometimes call cheek bones? |
| sphenoid | which of the following bones does not articulate with the zygomatic bone?-temporal, maxilla, frontal, sphenoid |
| lacrimal bones | which facial bone is associated with the tear ducts? |
| conchae or turbinates | the purpose of the _____, or ______, is to divide the nasal cavity into compartments and circulate air coming into the nasal cavities. |
| false | the majority of the nose is formed by the right and left nasal bones. |
| septal cartilages and vomer | a deviated nasal septum is most likely to occur at the junction between____and____ |
| 30, 37 | from anterior to posterior, the cone shaped orbits project upward at an angle of ____degrees and toward the midsagittal plane at an angle of ____degrees |
| inferior orbital fissure | which facial bone opening has the maxillary branch of the fifth cranial nerve passing through it? |
| superior orbital fissure | which facial bone opening is formed by a cleft between the greater and lesser wings of the sphenoid bone? |
| optic nerve | what is another term for the second cranial nerve? |
| antrum of Highmore | what is the older term for the maxillary sinuses? |
| maxillary | an infection of the teeth may travel upward and involve the _____sinus |
| between inner and outer tables of the skull | specifically, where are the frontal sinuses located? |
| 6 years | the frontal sinuses rarely become aerated before the age of |
| labryinths | which specific aspect of the ethmoid bone contains the ethmoid sinuses? |
| osteomeatal complex | the drainage pathway for the paranasal sinuses is called |
| sphenoid sinus | which sinus will be projected through the open moth with a PA axial transoral projection? |
| infundibulum | what is the name of the passageway between the maxillary sinuses and the middle nasal meatus? |
| true | most CT studies of the sinuses do not require the use of contrast media |
| prone | which position is most often used when performing a CT study of the sinuses |
| false | facial bone studies should always be performed recumbent whenever possible |
| true | the common basic PA axial projection for facial bones requires a 15 degree caudad angle of the central ray, which projects the dense petrous ridges into the lower one-third of the orbits |
| false | an increase in mAs of 25% to 30% is often required for the geriatric patient with advanced osteoporosis |
| false | nuclear medicine is not helpful in diagnosing occult facial bone fractures |
| false | MRI is an excellent imaging modality for the detection of small metal foreign bodies in the eye |
| blow out fracture | what is the name of the fracture that results from a direct blow to the orbit leading to a disruption of the inferior orbital margin? |
| tripod | a free floating zygomatic bone is the frequent result of a _____fracture |
| zygoma | where is the CR centered for a lateral psotion for facial bones |
| Waters method | what is the proper method name for the parietoacanthial projection of the facial bones |
| 30 degrees | what CR angle must be used to project the petrous ridges just below the orbital floor with the PA axial projection |
| orbital rims and floors | which structures specifically are visualized better on the modified parietoacanthial projection as compared with the basic waters projection |
| reduces OID, reduces exposure to the thyroid gland | give two reasons why projections of the facial bones are performed PA rather than AP when possible |
| mentomeatal line, 37 | the waters projection for the facial bones will have the _____ perpendicular to the image receptor, which places the OML at a ___ angle |
| acanthion | where does the CR exit for a waters projection of the facial bones |
| nasion | where does the CR exit for the caldwell projection for facial bones |
| lipsmeatal, 55 | the modified waters projection requires that the _____line is perpendicular to the IR, which places the OML at a ____degree angle to the tabletop and IR |
| true | lateral projections for nasal bones generally are taken bilaterally for comparison |
| false | the tangential projection for a unilateral zygomatic arch requires that the skull be rotated and tilted 15 degrees away from the affected side |
| true | both oblique inferosuperior (tangential) projections for the zygomatic arch are generally taken for comparison |
| maxillary sinuses, inferior orbital rims | for a pa waters projection, the petrous ridges should be projected directly below the ______and projected into the lower half of the maxillary sinuses or below the _____for a modified waters projection |
| glabelloavelorline or GAL | for the superiorinferior projection of the nasal bones, the IR is placed perpendicular to the ____ |
| zygomatic arches | which specific facial bone structures are best demonstrated with the SMV projection if the correct exposure factors are used |
| 1 in superior to glabella to pass through midarches | where is the CR centered for an AP axial projection for the zygomatic arches? |
| rhese method, 3 point landing | list the proper method name and the common descriptive name for the parieto-orbital oblique projection for the optic foramen |
| cheek, nose, chin, 53, acanthiomeatal, lower outer | the three aspects of the face that should be in contact with the head unit or tabletop when beginning positiong for the parieto-orbital oblique projections are the___,_____,and ____. The final angle between the midsagittal plane and th IR should be___ degrees, with the _____line perpendicular to the IR. THis places the optic foramen in the _____quadrant of the orbit |
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