Radiological Anatomy — MCQs

Radiological Anatomy Indian Medical PG Practice Questions and MCQs

Question 221: Which radiographic view is best for visualizing the frontal sinus?

A. Caldwell's view (Correct Answer)
B. Towne's view
C. Schuller's view
D. Water's view

Explanation: ***Caldwell's view*** - This **posteroanterior (PA) radiographic projection** is optimized for visualizing the **frontal sinuses** and the **anterior ethmoid air cells**. - The OML (orbitomeatal line) is positioned perpendicular to the image receptor, directing the central ray 15 degrees caudal from the posterior aspect of the skull, projecting the petrous ridges below the orbits. *Towne's view* - The **AP axial projection**, or Towne's view, is primarily used to visualize the **occipital bone**, **foramen magnum**, and the **condyles of the mandible**. - It involves caudal angulation of the central ray to separate these structures. *Schuller's view* - Also known as the **lateral projection of the mastoid**, Schuller's view is primarily used to assess the **mastoid air cells** and the **external auditory canal**. - It helps in evaluating mastoiditis or cholesteatoma. *Water's view* - This **parietoacanthial projection**, or Water's view, is best for visualizing the **maxillary sinuses**, and also provides good visualization of the **orbits** and **zygomatic arches**. - The MML (mentomeatal line) is positioned perpendicular to the image receptor, projecting the petrous ridges below the maxillary sinuses.

Question 222: The Occipitomental view of PNS X-ray is also known as?

A. Pine view
B. Caldwell view
C. Waters view (Correct Answer)
D. Towne's view

Explanation: ***Waters view*** - The Waters view is a common radiographic projection used to visualize the **paranasal sinuses**, particularly the **maxillary sinuses**. - It is also known as the **occipitomental view** because the X-ray beam passes from the occiput to the mentum (chin). *Caldwell view* - The Caldwell view, or **occipitofrontal view**, is another common projection for the paranasal sinuses. - It primarily provides a good view of the **frontal sinuses** and ethmoid air cells, not the maxillary sinuses as prominently as the Waters view. *Pine view* - "Pine view" is **not a recognized standard radiographic projection** for the paranasal sinuses or any other body part. - This term does not correspond to any established anatomical or imaging technique. *Towne's view* - The Towne's view is a radiographic projection typically used to visualize the **occipital bone** and foramen magnum. - It is not used for routine assessment of the paranasal sinuses.

Practice by Chapter

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Radiographic Anatomy of Spine

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Radiographic Anatomy of Extremities

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Cross-sectional Anatomy: Brain and Head

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Cross-sectional Anatomy: Neck

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Cross-sectional Anatomy: Thorax

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Cross-sectional Anatomy: Abdomen and Pelvis

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Vascular Anatomy

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