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Where is the Sella Turcica?

Where is the Sella Turcica?. 1 Sphenoid bone. Sella Turcica - lateral view. Literally means “Turkish Saddle” Superior surface of Sphenoid hypophysis = pituitary gland. Pituitary Gland sits inside Sella Turcica.

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Where is the Sella Turcica?

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  1. Where is the Sella Turcica?

  2. 1 Sphenoid bone

  3. Sella Turcica - lateral view • Literally means “Turkish Saddle” • Superior surface of Sphenoid • hypophysis = pituitary gland

  4. Pituitary Glandsits inside Sella Turcica Once thought to be master gland- itself is regulated by hormones from hypothalamus Controls release of hormones to thyroid, gonads, adrenal cortex(growth, maturation, reproduction)

  5. Sella Turcica series is largely obsolete! • If film readout is negative, could be diagnostic x-ray not sensitive enough to detect problem - need an MRI or CT • If positive, patient sent to CT or MRI for more detailed evaluation anyway • (CT for bone, MRI for soft tissue)

  6. PA Axial - SellaTurcica Head and nose rest on IR ( like Skull) CR 10 degrees cephalic CR exits at Glabella Collimate to 4” X4”

  7. PA Axial - Sella Turcica Imae

  8. Evaluation Criteria -PA Axial Sella X-ray • No rotation of cranium • Symmetric petrous ridges • Close beam restriction!

  9. Anterior Clinoids Posterior Clinoids Dorsum Sellae Hypophysis (pituitary) Sphenoid sinus Lateral Sella Turcica A B C D E

  10. Sella Turcica -Lateral Mid-sagittal plane is parallel with plane of IR IPL is perpendicular to IR IOML is parallel with transverse axis of film i.e.--same as Lateral skull and sinus and facial bones!

  11. Sella Turcica -lateral cont’d Upright or semi-prone (crosstable) 8X10 cassette CR perpendicularto IR 3/4”anterior, 3/4” superior to EAM Collimate to about 4”by 4”

  12. Evaluation Criteria - Sella Turcica Sella in center of film Sella Turcica not rotated Anterior clinoids superimposed Posterior clinoids superimposed Close beam restriction

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