Facial Bones test FINAL

Which view/projection of the facial bones requires the midsagittal plane to be parallel to the IR?

Lateral

Which views/projections of the facial bones requires the midsagittal plane to be perpendicular to the IR?

• Parietoacanthial

• PA axial

• SMV

• AP axial (modified Townes method)

Which view/projection of the facial bones requires the IP line to be perpendicular to the IR?

Lateral

Which view/projection of the facial bones requires the IOML to be perpendicular to the front edge of the cassette?

Lateral

Which views/projections of the facial bones requires the OML to be perpendicular to the IR?

• PA axial

• AP axial (modified towne method)

Which view/projection of the facial bones requires the IOML to be as parallel with the plane of the IR as possible?

SMV

Which view/projection of the facial bones requires the MML to be nearly perpendicular to the IR?

Parietoacanthial

In the parietoacanthial and acanthioparietal projections, how much of an angle should the OML form with the plane of the IR?

37 degrees

In the modified towne method (AP axial) facial bones projection, if the OML is perpendicular to the IR, how much and in what direction should the CR be angled?

30 degrees caudad

In the modified towne method (AP axial) facial bones projection, if the IOML is perpendicular to the IR, how much and in what direction should the CR be angled?

37 degrees caudad

In the PA axial projection of the facial bones, how much should the CR be angled and in what direction?

15 degrees caudad

In the SMV projection for facial bones, if the patient is unable to extend the neck to achieve proper positioning, you should angle your CR so that it is perpendicular to the _______

IOML

For the tangential projection of an individual zygomatic arch, ____________________

For the tangential projection of an individual zygomatic arch, which line should be as close to parallel as possible to the IR?

IOML

Which view/projection is the CR centered to the glabella or 1” above the nasion?

Towne

Which view/projection is the CR perpendicular to the IOML and enters the MSP of the throat at a level 1” posterior to the outer canthi?

SMV

Which view/projection is the CR centered so that it exits the nasion?

Caldwell

Which view/projection is the CR centered so that it exits the acanthion?

Waters

Which view/projection is the CR centered to the lateral surface of the zygomatic bone midway between the outer canthus and the EAM?

Lateral

In the tangential projection for an individual zygomatic arch, where should the central ray enter?

Zygomatic arch, approximately 1” posterior to the outer canthus

Which facial bones views/projections are used to demonstrate the zygomatic arches or a zygomatic arch?

• SMV

• Tangential projection

• Towne

• Parietoacanthial

Which facial bones views/projections are used to demonstrate the orbital rims?

• PA axial

• Parietoacanthial

Which facial bones views/projections demonstrate the maxillae?

• PA axial

• Parietoacanthial

Which facial bones views/projections demonstrates the nasal septum?

• PA axial

• Parietoacanthial

Which facial bones views/projections demonstrate all of the facial bones?

Lateral

Which view/projection should the mandíbular rami be superimposed?

Lateral

Which facial bones views/projections should the orbital roofs be superimposed?

Lateral

Which facial bones views/projections should the petrous ridges be projected just inferior to the maxillary sinuses?

Waters

Which facial bones views/projection should the petrous ridges be projected into the lower third of the orbits?

PA axial

Which facial bones views/projections should the zygomatic arch or arches be projected free of superimposition?

• SMV

• Tangential projection

• Towne

Which facial bones views/projections should demonstrate symmetrical zygomatic arches thus indicating no rotation of the head?

• SMV

• Towne

Which facial bones views/projections should the zygomatic arch or arches be projected lateral to the visible mandíbular ramus or rami?

Towne

Which facial bones views/projections should the distance between the lateral border of the orbit and the lateral border of the skull be symmetrical on each side?

• Caldwell

• Parietoacanthial

Which facial bones views/projections should bony detail, as well as surrounding soft tissues, be demonstrated?

• Lateral

• Caldwell

• Parietoacanthial

Which facial bones views/projections should the sella turcica not be rotated?

Lateral

Which positioning line and angle indicate correct positioning of the head for the parietoacanthial projection, Water's method?

OML; 37 degrees to the IR

Which evaluation criterion pertains to the PA axial projection, Caldwell method?

The distance between the lateral border of the skull and orbit should be the same on both sides. 

Where should the petrous ridges be seen in the image of the parietoacanthial projection of the facial bones?

Below the maxillary sinuses

With reference to the IR, how should the central ray be directed for the parietoacanthial projection, Water's method?

Perpendicular

Which evaluation criterion pertains to the lateral projection of the facial bones?

The orbital roofs should be superimposed.

Which evaluation criterion pertains to the SMV projection for bilateral zygomatic arches?

The zygomatic arches should be free from overlying structures. 

With reference to the IR, how should the MSP be adjusted for the tangential projection demonstrating an individual zygomatic arch?

15 degrees from perpendicular

An AP axial projection (modified Towne method) of the bilateral zygomatic arches is performed similarly to the AP axial projection (Towne method) of the skull, except that the projection for the zygomatic arches requires that which of the following be done?

The central ray should be directed to the glabella. 

An AP axial projection (modified Towne method) of the bilateral zygomatic arches produces an image similar to the AP axial projection (Towne method) of the skull. How many degrees and in what direction should the central ray be directed for this projection to demonstrate the zygomatic arches when the OML is perpendicular to the IR?

30 degrees caudad

Which evaluation criterion pertains to the parietoacanthial projection, Water's method?

The petrous ridges should be projected immediately below the maxillary sinuses. 

With reference to the patient, where should the central ray be directed for the lateral projection of the facial bones?

Zygomatic bone