Exam 11: Image Analysis of the Cranium

A PA axial cranial projection (Caldwell method) with accurate positioning demonstrates 1)equal distance from the crista galli to the lateral cranial cortices on each side. 2)the petrous ridges aligned with the supraorbital margins. 3)the petrous pyramids superimposed over the infraorbital margins. 4)the superior orbital fissures demonstrated within the orbits.

An SMV cranial projection (Schueller method) with poor positioning demonstrates the mandibular mentum posterior to the ethmoid sinuses. How could the positioning setup be adjusted for an optimal projection to be obtained? 1)Tilt the patient's head toward the left side. 2)Angle the central ray cephalically. 3)Increase neck extension. 4)Align the IOML parallel with the IR.

An acanthioparietal sinus projection (Waters method) can be distinguished from a parietoacanthial sinus projection because 1)it demonstrates the bony nasal septum in alignment with the collimated field's longitudinal axis. 2)it demonstrates greater orbital magnification. 3)it demonstrates less distance from the lateral orbital rims to the lateral cranial cortices. 4)the petrous ridges are demonstrated superior to the maxillary sinuses.

An AP axial (Towne method) cranial projection with poor positioning demonstrates a foreshortened dorsum sellae and the atlas's posterior arch within the foramen magnum. How was the positioning setup mispositioned for such a projection to be obtained? 1)The patient's face was rotated toward the right side. 2)The chin was not adequately tucked. 3)The OML was not aligned perpendicular to the IR. 4)The central ray was angled too caudally.

A lateral cranial projection with accurate positioning demonstrates the 1)sella turcica in profile. 2)right orbital roof slightly superior to the left orbital roof. 3)dorsum sellae within the foramen magnum. 4)mandibular rami superimposed.

The distance from the posterior clinoid process to the lateral foramen magnum is less on the patient's left side than on the right side on an AP axial cranium projection (Towne method). To obtain an optimal projection,

A poorly positioned SMV cranial projection (Schueller method) demonstrates the mandibular mentum too far anterior to the ethmoid sinuses. How was the positioning setup mispositioned for such a projection to be obtained? 1)The patient's neck was overextended. 2)The IOML was not aligned parallel with the IR. 3)The central ray was angled too caudally. 4)The patient's head was tilted toward the right side.

An optimally positioned lateral cranium projection demonstrates all of the following except

When the central ray is aligned with a patient's OML, the tube angle reads 25 degrees caudad. What angulation would you use for this patient for a trauma AP axial (Towne method) cranial projection?

A PA cranial projection obtained with the patient's face rotated toward the right side demonstrates a greater distanced from the

Which of the following pertains to an AP axial (Towne method) cranial projection obtained with the patient's face rotated toward the left side?

A parietoacanthial sinus projection (Waters method) with accurate positioning demonstrates 1)an equal distance from the lateral orbital margin to the lateral cranial cortex on both sides. 2)the bony nasal septum in alignment with the long axis of the exposure field. 3)the petrous ridges demonstrated inferior to the maxillary sinuses. 4)the ethmoid sinus through the mouth cavity in an open-mouth position.

Which of the following is true of an SMV cranial projection (Schueller method) obtained with the vertex of the patient's head tilted toward the right side?

For an AP axial (Towne method) mandible projection, 1)the central ray is centered to the midsagittal plane at the level of the glabella. 2)the central ray is angled 35 to 40 degrees caudally. 3)the IOML is positioned perpendicular to the IR. 4)a lengthwise 8- × 10-inch IR is used.

A lateral cranial projection with poor positioning demonstrates the greater wings of the sphenoid and anterior cranial cortices without superimposition. One of each of the corresponding structures is demonstrated posterior to the other. How was the patient mispositioned for such a projection to be obtained?

For a parietoacanthial sinus projection (Waters method), the 1)patient is positioned upright to demonstrate air-fluid levels within the maxillary sinuses. 2)MML is aligned perpendicular to the IR. 3)central ray is centered to the acanthion. 4)OML is at a 37-degree angle with the central ray.

An AP axial (Towne method) cranial projection with poor positioning demonstrates the dorsum sellae superior to the foramen magnum. How was the positioning setup mispositioned for such a projection to be obtained? 1)The patient's face was rotated toward the left side. 2)The chin was not adequately tucked. 3)The OML was not aligned perpendicular to the IR. 4)The central ray was angled too caudally.

A parietocanthial facial bone projection (Waters method) demonstrating the petrous ridges within the maxillary sinuses

An AP cranial projection with poor positioning demonstrates the petrous ridges inferior to the supraorbital margins. How could the positioning setup be adjusted for an optimal projection to be obtained? 1)Rotate the patient's face toward the left side. 2)Angle the central ray caudally. 3)Position the OML perpendicular to the IR. 4)Tuck the patient's chin more.

An AP cranial projection can be distinguished from a PA cranial projection because it demonstrates 1)less orbital magnification. 2)the internal auditory canals horizontally through the orbits. 3)less distance from the lateral orbital margins to the lateral cranial cortices. 4)the anterior clinoids and dorsum sellae superior to the ethmoid sinuses.