Skull Review

What is the angle between the midsagittal plane and image receptor for a Rheese projection ?

• 45 Degrees

• 30 Degrees

• 53 Degrees

• 90 Degrees

The Auditory ossicles or the bones of middle ear are located in which skull bone?

• Occipital

• Parietal

• Frontal

• Temporal

What line is perpendicular to the plane of IR in the PA axial projection of Mandibular Rami?

• IOML

• OML

• MML

• IPL

Where is the CR centered for lateral projection of nasal bones ?

• At the nasion

• One inch below the nasion

• One inch distal to nasion

• One inch above the nasion

Which routine projection is best for demonstrating the maxillary sinuses?

A PA Axial skull ( Caldwell method) shows the petrous ridges are at the level of the supraorbital margin. without changing the CR angulation, how would you correct this image?

• Leave it as is, it is correct

• Tilt the head up more

• Tilt the head down more

• Rotate the head to the right

A radiograph of Parietoacanthial ( Waters method) reveals that the petrous ridges are projected below maxillary sinuses. What positioning error is present?

• Move the head up

• No need for repeat

• Tilt the head down

• Angle the tube

A lateral radiograph of the facial bones demonstrates that the bodies of mandible are not superimposed and one is about I cm superior to the other.

what is wrong and How would you correct this image?

• Head was tilted, Make sure MSP is parallel to IR

• Nothing wrong, this is acceptable

• Head was tilted to the right, make sure to tilt the head more

• Head was rotated, angle the tube

A patient with a possible blow out fracture enters the ER. In addition to basic facial bone routine, what single projection would best demonstrate this type of injury ?

• Waters method

• Caldwell method

• Lateral orbit

• Rhese method or optic foramina

In a Towne method, if you are angling the CR 30 degrees, what line should be perpendicular to IR ?

• OML

• IOML

• IPL

• MML