X-RAY OF SELLA TURCICA

X-RAY OF SELLA TURCICA

X-ray Sella Turcica Lateral View

Sella Turcica Lateral

Region: sella turcica, anterior clinoid process, posterior clinoid process, wing of sphenoid process

Pathology: deformation of sella turcica, pituitary adenomas, calcification of sella turcica

SID: 100 cm (40 inches)

Central Ray: perpendicular beam directed at the point 2 cm (0.75 inches) anterosuperior to the external auditory meatus (EAM)

Respiration: suspended

Position:

1, The patient is placed either in an erect position or in a semi-prone position.
2. Align the inferior orbitomeatal line (IOML) parallel to the horizontal axis of the image receptor (IR).
3. Align Interpapillary Line (IPL) perpendicular to the IR and adjust head to align the midsagittal plane (MSP) parallel to the IR.
4. Place the point 2 cm superior and 2 cm anterior to the external auditory meatus at the center of IR.
5. Maintain true lateral position by placing the patient's ear on the IR.

Collimation: Include the entire structure of sella turcica.

Evaluation:

1. The superimposition of the sella turcica with anterior clinoid process, greater wing of sphenoid, and extra auditory meatus should be observable without skull rotation.
2. The sella turcica should not be rotated and floor of sella turcica should be shown as a line not a plane.
3. The superimposition of superior orbital margins should be observed without tilt.

kVp:80, mAs: 28

Tip:

1. When patient cannot pose semi-prone position, place patient in supine position and lean temporal bone on image receptor (IR) to make true lateral position. In this case, projecting horizontally is considered.
2. Semi-prone position is an uncomfortable position; it helps the position to use assistance instruments like pillow or sponge to support cervical region.
3. It is hard to maintain the pose for patient; the inspection must be done in a short time.
4. Cone is recommended to use for this inspection.