Skull and Sella Tursica Demonstrates

Demonstrates

Best demonstrates the frontal and parietal bones.

SKULL

AP Projection

• Best demonstrates alveolar ridge fractures.

• 15° caudad

• Forehead and Nose

SKULL

PA Axial Projection (Caldwell’s Method)

• 20° to 25° caudad to mid-orbit (Demonstrates superior orbital fissures)

• 25° to 30° Caudad (Demonstrate rotundum foramina)

SKULL

Pa Axial Projection (Original Caldwell’s Method)

Best demonstrates the occipital bone.

SKULL

Ap Axial Projection (Towne’s/Grashey Method)

• Best demonstrate the occipital bone with magnification.

• Also called Reverse Towne’s Projection.

• Forehead and Nose

SKULL

PA Axial Projection (Haas Method)

• Best demonstrate the vestibulo-cochlear region (the organ of hearing).

• Alternative for Grashey and Haas projection

• Upper frontal region of the skull on the table

SKULL

PA Axial Projection (Valdini Method)

Best demonstrate the parietal bones

SKULL

Lateral

Demonstrates traumatic sphenoid effusion which is an indication of a basal skull fracture.

SKULL

Crosstable or Shoot-Through Lateral Pro

• Best demonstrate the base of the skull

• Head resting on vertex

SKULL

Submentovertical (SMV) (Full Basal Projection) Schuller Method

• Best projection for foramen ovale and spinosum

• Useful for studies of anterior cranial base and sphenoid sinuses.

• Alternative projection for SMV projection.

SKULL

Verticosubmento (Full Basal Projection) Schuller Method

4 parts of Sella Tursica

• Sella Tursica

• Posterior Clinoid Process

• Dorsum Sellae

• Clivus

Turkish Saddle

Sella Tursica

Small extensions superior to the dorsum sellae.

Posterior Clinoid Process

• Back of the saddle

• Posterior wall of sella tursica

Dorsum Sellae

• Shallow depression just posterior to the base of the dorsum sellae.

• Forms a base of support for the pons portion of the brain

Clivus

Best demonstrate the sella tursica and clivus in profile.

SELLA TURSICA

Lateral Projection

• 30° Caudad (Anterior clinoid process directly above the foramen magnum)

• 37° Caudad (Posterior clinoid process and Dorsum Sellae projected into the foramen magnum

SELLA TURSICA

AP Axial (Towne’s/Grashey Method)

This is an alternative projection for demonstrating the dorsum sella, posterior clinoid, foramen magnum and petrous ridge.

SELLA TURSICA

PA Axial Projection (Haas Method)