What is the maximum CR angulation used for the axiolateral oblique projection of the mandible

The point of union between both halves of the mandible is termed:a. gonionb. ramusc. symphysis menti

d. mental foramina

The posterior aspect of the orbit is termed the:a. apexb. basec. sphenoid strut

d. crown

How many facial bones help make up the bony orbit?a. threeb. fourc. five

d. seven

Which bone is "free floating" with a tripod fracture?a. maxillab. ethmoidc. temporal

d. zygomatic

What can the technologist do if the patient cannot extend the head and neck adequately for a routine submentovertex projection of the zygomatic arches?a. perform the Haas methodb. use a short SID to magnify the arches

c. angle the CR to place it perpend

c. angle the CR to place it perpendicular to the IOML

Which positioning line is parallel to the image receptor for the oblique inferosuperior (tangential) projection of the zygomatic arches?a. midsagittal planeb. infraorbitomeatalc. orbitomeatal

d. glabelloalveolar

Which of the following points is NOT true about the oblique inferosuperior (tangential) projection of the zygomatic arches?a. It requires both rotation and tilt of the skullb. A small focal spot shoudl be usedc. The AEC should not be used

d. A grid mus

Which projection best demonstrates the floor of the orbits?a. Parietoacanthial (Waters)b. Modified parietoacanthial (modified Waters)c. PA axial (Caldwell)

d. Lateral facial bones

b. Modified parietoacanthial (modified Waters)

Which positiioning line must be used with a 30� caudad angle for an AP axial projection of zygomatic arches?a. IOMLb. AMLc. OML

d. GAL

What is the angle between the midsagittal plane and the image receptor for a parieto-orbital oblique projection of the optic foramen?a. 45 degreesb. 12 degreesc. 30 degrees

d. 53 degrees

Which positioning line is placed perpendicular to the image receptor for the parieto-orbital projection of the optic foramina?a. OMLb. AMLc. MML

d. IOML

True/False? The proper name for the parieto-orbital oblique projection is the Schuller method

True/False? Optic foramen studies are routinely taken as bilateral projections.

What is the maximum CR angulation used for the axiolateral oblique projection of the mandible?a. 10 to 15 degreesb. 25 degreesc. 30 degrees

d. 45 degrees

How much skull rotation (from a lateral position) is required to place the ramus parallel to the image receptor for the axiolateral oblique projection of the mandible?a. 30 degreesb. 45 degreesc. 53 degrees

d. None (keep skull in lateral position)

Why is the chin extended for an axiolateral oblique projection of the mandible?a. to open up the TMJb. to profile the condylar processc. to prevent superimposition upon the cervical spine

d. to better visualize the mentum

c. to prevent superimposition upon the cervical spine

Where does the CR exit for a PA axial projection of the mandible?a. junction of the lipsb. nasionc. mentum

d. acanthion

Which positioning line is perpendicular to the image receptor for a PA projection of the mandible?a. OMLb. AMLc. IOML

d. GAL

Which aspect of the mandible is best demonstrated with an AP axial projection?a. bodyb. mentumc. mental foramen

d. condyloid process

Where is the CR centered for an AP axial projection for the mandible?a. at the nasionb. at the glabellac. at the mentum

d. 2 inches above glabella

Which projection will best demonstrate the entire mandible with one exposure?a. AP axialb. submentovertexc. axiolateral

d. tomography

What CR angle is required for the AP axial projection for the temporomandibular joints (TMJs) with the IOML perpendicular to the image receptor?a. 30 degreesb. 37 degreesc. 25 degrees

d. 42 degrees

What is the position of the skull for an axiolateral projection (Schuller method) of the TMJs?a. True lateral positionb. OML is at a 37� angle to the IRc. Midsagittal plane at a 53� to the IR

d. Skull rotated 15� toward the IR from the lateral position

The Modified Law method for the TMJ requires a _____� rotation of the skull and a ____� angle of the CR.a. 15, 15b. 10; 15c. 5; 0

d. 0; 25-30

What CR angle is required for the Schuller method projection of the TMJs?a. 15 degree caudadb. 25 to 30 caudadc. 20 to 25 cephalad

d. None; the CR sould be perpendicular to the film

A fracture involving the facial bones where a blow to one side causes a fracture to the opposite side is termed a _____ fracture.a. tripodb. blow outc. Le Fort

d. contrecoup

Which projection will best demonstrate OPTIC FORAMEN?a. axial transcranial (Schuller)b. PA axial (Bertel)c. PA axial (Caldwell)d. Parietoacanthial (Modified Waters)e. Parietoacanthial (Waters)f. Parieto-orbital (Hough)

g. Parieto-orbital (Rhese)

Which projection will best demonstrate BLOW-OUT Fx?a. axial transcranial (Schuller)b. PA axial (Bertel)c. PA axial (Caldwell)d. Parietoacanthial (Modified Waters)e. Parietoacanthial (Waters)f. Parieto-orbital (Hough)

g. Parieto-orbital (Rhese)

Which projection will best demonstrate SUPERIOR ORBITAL FISSURES?a. axial transcranial (Schuller)b. PA axial (Bertel)c. PA axial (Caldwell)d. Parietoacanthial (Modified Waters)e. Parietoacanthial (Waters)f. Parieto-orbital (Hough)

g. Parieto-orbital

Which projection will best demonstrate TEMPOROMANDIBULAR JOINT?a. axial transcranial (Schuller)b. PA axial (Bertel)c. PA axial (Caldwell)d. Parietoacanthial (Modified Waters)e. Parietoacanthial (Waters)f. Parieto-orbital (Hough)

g. Parieto-orbital (

a. axial transcranial (Schuller)

Which position would best demonstrate bilateral zygomatic arches on one image?a. AP axial (Modified Towne)b. Axiolateral (oblique position)c. Axiolateral oblique (Modified Law)

d. Tangential (oblique inferosuperior projection)

a. AP axial (Modified Towne)

Which position would best demonstrate one zygomatic arch on a patient with a depressed fracture or "flat" cheekbones?a. AP axial (Modified Towne)b. Axiolateral (oblique position)c. Axiolateral oblique (Modified Law)

d. Tangential (oblique inferosuperio

d. Tangential (oblique inferosuperior projection)

True/False? The mandibular condyles should be inferior to the petrous portion of the temporal bone on a submentovertex (SMV) image.

If the patient is semi-prone on the table, in order to demonstrate tehright TMJ, what position will patient's BODY have to be in?a. LAOb. LPOc. laterald. RAO

e. RPO

For an AP axiolateral projection of the mandible, how many degrees is the head turned from true lateral in order to demonstrate the mentum?a. 10b. 15c. 30

d. 45