rotation skull

1. 1A radiograph of a lateral projection of the cranium reveals that the orbital roofs (plates) are not superimposed—one is slightly
   superior to the other. Which of the following positioning errors led to this radiographic outcome?

   1. Aa. Rotation
   2. Bb. Tilt
   3. Cc. Excessive flexion
   4. Dd. Excessive extension
2. 234. Which one of the following positioning errors most often results in a repeat exposure of a cranial position?

   1. Aa. Incorrect rotation and tilt
   2. Bb. Incorrect central ray placement
   3. Cc. Slight flexion
   4. Dd. Slight extension
3. 3112. How much skull rotation (from a lateral position) is required to place the ramus parallel to the IR for the axiolateral/axiolateral
   oblique projection of the mandible?

   1. Aa. None. The skull should be kept in a lateral position.
   2. Bb. 30°
   3. Cc. 45°
   4. Dd. 53°
4. 4130. A radiograph of a lateral projection of the facial bones reveals that the mandibular rami are not superimposed. What specific
   positioning error is present on this radiograph?

   1. Aa. Tilt
   2. Bb. Excessive flexion
   3. Cc. Excessive extension
   4. Dd. Rotation
5. 5132. How much skull rotation, from a lateral position, is recommended to best demonstrate the body of the mandible for an
   axiolateral/axiolateral oblique projection?

   1. Aa. None. Keep skull in true lateral position.
   2. Bb. 10 to 15° toward the IR
   3. Cc. 30° toward the IR
   4. Dd. 45° toward the IR
6. 6132. How much skull rotation, from a lateral position, is recommended to best demonstrate the body of the mandible for an
   axiolateral/axiolateral oblique projection?

   1. Aa. None. Keep skull in true lateral position.
   2. Bb. 10 to 15° toward the IR
   3. Cc. 30° toward the IR
   4. Dd. 45° toward the IR
7. 7136. A radiograph of an axiolateral oblique projection of the mandible reveals that the mandibular body is greatly foreshortened. Which
   of the following modifications is necessary to produce a more diagnostic image?

   1. Aa. Increase the rotation of skull toward the image receptor.
   2. Bb. Decrease the rotation of skull toward the image receptor.
   3. Cc. Decrease the CR angulation.
   4. Dd. Increase the CR angulation.
8. 8136. A radiograph of an axiolateral oblique projection of the mandible reveals that the mandibular body is greatly foreshortened. Which
   of the following modifications is necessary to produce a more diagnostic image?

   1. Aa. Increase the rotation of skull toward the image receptor.
   2. Bb. Decrease the rotation of skull toward the image receptor.
   3. Cc. Decrease the CR angulation.
   4. Dd. Increase the CR angulation.
9. 9140. A patient enters the ED with a possible fracture of the proximal ramus of the mandible. Which of the following routines would best
   diagnose this fracture?

   1. Aa. Parietoacanthial projection, axiolateral oblique projection with a 30° skull
      rotation toward IR, and lateral facial bone projection
   2. Bb. PA mandible projection, axiolateral oblique projection with a 45° skull rotation
      toward IR, and 35° AP axial projection
   3. Cc. PA axial mandible projection, axiolateral projection with no skull rotation, and a
      35° AP axial projection
   4. Dd. PA mandible projection, axiolateral oblique projection with a 45° skull rotation
      toward IR, and submentovertex projection
10. 10140. A patient enters the ED with a possible fracture of the proximal ramus of the mandible. Which of the following routines would best
    diagnose this fracture?

    1. Aa. Parietoacanthial projection, axiolateral oblique projection with a 30° skull
       rotation toward IR, and lateral facial bone projection
    2. Bb. PA mandible projection, axiolateral oblique projection with a 45° skull rotation
       toward IR, and 35° AP axial projection
    3. Cc. PA axial mandible projection, axiolateral projection with no skull rotation, and a
       35° AP axial projection
    4. Dd. PA mandible projection, axiolateral oblique projection with a 45° skull rotation
       toward IR, and submentovertex projection

11. 11142. A radiograph of a parietoacanthial (Waters) projection for sinuses reveals that the petrous pyramids are projected over the
    maxillary sinuses. What positioning error is present on this radiograph?

    1. Aa. Excessive flexion of head and neck
    2. Bb. Excessive extension of head and neck
    3. Cc. Excessive CR angulation
    4. Dd. Rotation of the head
12. 1235. A radiograph of a posteroanterior (PA) axial projection (Caldwell method) of the cranium reveals that the petrous ridges are located
    at the level of the lower one-third of the orbits. The technologist performed this projection with the CR angled 15° caudad to the
    orbitomeatal line (OML). How must positioning be altered if a repeat exposure is performed?

    1. Aa. Increase the extension of the skull.
    2. Bb. Increase the flexion of the skull.
    3. Cc. Increase the CR angulation.
    4. Dd. None of the above; positioning was correct.
13. 13135. A radiograph of a parieto-orbital oblique projection for the optic foramen reveals that the optic foramen is projected into the
    maxillary sinus. Which of the following modifications is necessary to produce a more diagnostic image?

    1. Aa. Decrease the extension of the head and neck.
    2. Bb. Increase the extension of the head and neck.
    3. Cc. Increase the CR angulation.
    4. Dd. Decrease the CR angulation.
14. 14121. What is the position of the skull for an axiolateral projection (Schuller method) of the TMJ?

    1. Aa. Midsagittal plane at a 53° angle to the image receptor
    2. Bb. Skull rotated 15° toward the IR from the lateral position
    3. Cc. True lateral position
    4. Dd. OML is at a 37° angle to the image receptor
15. 1586. The term antrum of Highmore is an older term for the:

    1. Aa. frontal sinuses.
    2. Bb. ethmoid sinuses.
    3. Cc. maxillary sinuses.
    4. Dd. nasal cavity.
16. 1643. A PA axial projection with a 25° caudad angle of the cranium reveals that the petrous ridges are at the level of the superior orbital
    margins. Which of the following modifications are required to correct this error?

    1. Aa. Decrease CR angle.
    2. Bb. Increase extension of cranium.
    3. Cc. Increase flexion of cranium.
    4. Dd. No corrections are required; this is an acceptable position.

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radiology Quiz sobre rotation skull, criado por Seleste Villarreal em 12-09-2019.

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Seleste Villarreal

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