A Trivia Quiz On Skull Positioning!

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Ryan Emerson
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  • 1/20 Questions

    What anatomical position would be used on a Towne method?

    • AP
    • PA
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About This Quiz

Explore skull positioning in radiology through 'A Trivia Quiz on Skull Positioning!' This quiz assesses knowledge on techniques like the Towne method, IOML positioning, and visualization of anatomical structures in skull radiography, vital for professionals in the field.

A Trivia Quiz On Skull Positioning! - Quiz

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  • 2. 

    On a lateral skull, the centering is___ the EAM.

    • 2 inches above

    • 2 inches below

    • 1 inch above

    • 1 inch below

    Correct Answer
    A. 2 inches above
    Explanation
    The correct answer is 2 inches above. This means that when taking a lateral skull X-ray, the centering point should be positioned 2 inches above the external auditory meatus (EAM). This positioning ensures that the X-ray captures the desired area of the skull.

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  • 3. 

    Where are the petrous ridges on a PA Caldwell with a 15 degree caudal angulation?

    • Lower 1/3 of orbits

    • Fully inside orbits

    • Above orbits

    • Below orbits

    Correct Answer
    A. Lower 1/3 of orbits
    Explanation
    pg 413

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  • 4. 

    On a PA Caldwell, where does the CR exit?

    • Nasion

    • Glabella

    • Acanthion

    • Mental point

    Correct Answer
    A. Nasion
    Explanation
    pg 413

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  • 5. 

    What line is perpendicular to the IR in a PA skull with 0 degree angulation?

    • OML

    • IOML

    • MML

    • LDL

    Correct Answer
    A. OML
    Explanation
    pg 414

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  • 6. 

    On a PA Caldwell of the sinuses, the OML is tilted ______

    • 15 degrees

    • 30 degrees

    • 20 degrees

    • 10 degrees

    Correct Answer
    A. 15 degrees
    Explanation
    On a PA Caldwell of the sinuses, the OML (Orbitomeatal Line) is tilted 15 degrees. The OML is an imaginary line that connects the external auditory meatus (ear canal) to the infraorbital rim (lower margin of the eye socket). In a PA Caldwell view, the patient's head is tilted backwards, and the X-ray beam is directed from below the patient's skull. This angulation of 15 degrees allows for better visualization of the frontal sinuses and reduces the superimposition of other structures in the image.

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  • 7. 

    Where does the CR exit for a open mouth waters view?

    • Acanthion

    • Nasion

    • Glabella

    • LML

    Correct Answer
    A. Acanthion
    Explanation
    The CR exits for an open mouth waters view at the acanthion. The acanthion is the midpoint between the base of the nose and the upper lip. This position allows for visualization of the maxillary sinuses and the surrounding structures.

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  • 8. 

    What must be visualized inside the foramen magnum of an AP Towne projection?

    • Mastoid

    • Dorsum sellae

    • Dens/ Odontoid process

    • Lamda

    Correct Answer
    A. Dorsum sellae
    Explanation
    The correct answer is Dorsum sellae. The foramen magnum is a large opening at the base of the skull through which the spinal cord passes. In an AP Towne projection, the Dorsum sellae, which is a bony ridge on the inside of the skull, should be visualized within the foramen magnum. This projection is commonly used to visualize the posterior fossa and structures within it, such as the brainstem and cerebellum. The other options mentioned are not typically visualized within the foramen magnum in this projection.

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  • 9. 

    The Dens/ Odontoid process is seen inside the foramen magnum on an SMV?

    • True

    • False

    Correct Answer
    A. True
    Explanation
    pg 415

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  • 10. 

    An AP Towne using the IOML would use a tube angulation of____ degrees ______

    • 37 degrees cephalic

    • 30 degrees cephalic

    • 37 degrees caudal

    • 30 degrees caudal

    Correct Answer
    A. 37 degrees caudal
    Explanation
    pg 411

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  • 11. 

    On the open mouth waters view, the OML forms a ____ degree angle to the IR.

    • 37

    • 30

    • 25

    • 40

    Correct Answer
    A. 37
    Explanation
    On the open mouth waters view, the OML (Open Mouth Line) is an imaginary line drawn from the lower border of the upper incisors to the base of the skull. In this view, the OML forms a 37-degree angle to the IR (Image Receptor). This angle is important for proper positioning and alignment of the patient's head during the imaging procedure, ensuring accurate and clear images of the oral cavity and surrounding structures.

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  • 12. 

    On lateral fascial bones, the CR is centered to halfway between the outer cants and TEA

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement is false because the CR (central ray) is not centered halfway between the outer cants (the outer corners of the eyes) and TEA (top of external auditory meatus) on lateral facial bones. The correct positioning for a lateral facial bone x-ray is to place the CR perpendicular to the IR (image receptor) and centered to the midline of the skull. This ensures that the entire facial bone structure is captured in the image.

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  • 13. 

    Which sinuses are visualized on a lateral sinus view? 

    • Frontal sinuses

    • Ethmoid sinuses

    • Maxillary sinuses

    • Sphenoid sinuses

    Correct Answer(s)
    A. Frontal sinuses
    A. Ethmoid sinuses
    A. Maxillary sinuses
    A. Sphenoid sinuses
    Explanation
    pg 436

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  • 14. 

    Which line is perpendicular to the IR in a waters view?

    • MML

    • IOML

    • OML

    • GML

    Correct Answer
    A. MML
    Explanation
    The line MML is perpendicular to the IR in a waters view.

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  • 15. 

    On the lateral skull, the IOML is perpendicular to the____

    • IR

    • Front edge of the IR

    • Floor

    • Top edge of IR

    Correct Answer
    A. Front edge of the IR
    Explanation
    The IOML (infraorbital-meatal line) is a reference line used in radiology to position the skull correctly. In a lateral skull X-ray, the IOML should be perpendicular to the front edge of the image receptor (IR). This means that the IOML should be aligned at a 90-degree angle with the front edge of the IR. This positioning ensures accurate and consistent imaging of the skull structures.

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  • 16. 

    Where is the CR centered for an SMV of the skull?

    • 1 1/2 inches below mandibular symphysis

    • 2 inches below mandibular symphysis

    • 1 1/2 inches below EAM

    • 2 inches below EAM

    Correct Answer
    A. 1 1/2 inches below mandibular symphysis
    Explanation
    The CR is centered 1 1/2 inches below the mandibular symphysis. This means that the center of the X-ray beam is positioned 1 1/2 inches below the point where the two halves of the lower jaw meet. This is an important landmark for positioning the X-ray beam correctly for imaging the skull.

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  • 17. 

    Which facial reference line does not use the EAM?

    • GAL

    • MML

    • GOL

    • AML

    Correct Answer
    A. GAL
    Explanation
    The GAL (Glabella to Ala) facial reference line does not use the EAM (External Auditory Meatus). This line is drawn from the glabella (the space between the eyebrows) to the ala (the wing of the nose). The EAM is not included in this reference line as it is not relevant to the measurement or analysis being performed.

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  • 18. 

    What Anatomy is demonstrated on a modified Towne view?

    • Zygomatic arches

    • Foramen magnum

    • Nasal septum

    • Orbits

    Correct Answer
    A. Zygomatic arches
    Explanation
    A modified Towne view is an X-ray imaging technique that allows visualization of the skull. It is commonly used to assess fractures and abnormalities in the cranial region. The zygomatic arches, also known as the cheekbones, are clearly visible in this view. Therefore, the correct answer is zygomatic arches.

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  • 19. 

    In the modified Waters view, which line is perpendicular to the IR?

    • IOML

    • MSP

    • OML

    • AML

    Correct Answer
    A. MSP
    Explanation
    In the modified Waters view, the line that is perpendicular to the IR is the MSP (Mid-Sagittal Plane). This is because the MSP is a vertical line that passes through the midline of the skull and is perpendicular to the IR (Image Receptor). The other lines mentioned, IOML (Infraorbital-Meatal Line), OML (Orbitomeatal Line), and AML (Acanthiomeatal Line), are not perpendicular to the IR in the modified Waters view.

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  • 20. 

    Check all that are demonstrated on a waters view.

    • IOM's

    • Nasal septum

    • EAM

    • Mastoid processes

    Correct Answer(s)
    A. IOM's
    A. Nasal septum
    A. Mastoid processes
    Explanation
    A waters view is a radiographic imaging technique used to visualize the facial bones and sinuses. In this view, the IOM's (infraorbital margins), nasal septum, and mastoid processes are demonstrated. The IOM's refer to the bony ridges located below the eyes, the nasal septum is the cartilaginous structure that separates the nostrils, and the mastoid processes are the bony protuberances behind the ears. Therefore, all three structures are visible on a waters view.

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Quiz Review Timeline (Updated): Jul 26, 2024 +

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  • Current Version
  • Jul 26, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 15, 2017
    Quiz Created by
    Ryan Emerson
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