Lateral View - Right or Left
Xray examination of the sella turcica may be demonstrated the pituitary adenoma if involvement of the sella turcica occurs.- IR size - 18 x 24 cm (8 x 10 inches), crosswise
- Moving or stationary grid
- 70 to 80 kV range
- Small focal spot
- mAs 10
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| Right Lateral Sella Tucica - Erect |
- Remove all metallic or plastic objects from the patient's head.
- Take radiograph with patient in an erect or recumbent semiprone position.
Part Position:
- Place patient's head in a true lateral position; position patient's body oblique as needed for comfort.
- Align interpupillary line perpendicular to table/Bucky surface.
- Align midsagittal plane parallel to table/Bucky surface.
- Place IOML perpendicular to front edge of IR.
Central Ray:
- Align CR perpendicular to IR.
- Center to a point 3/4 inch (2 cm) anterior and 3/4 inch (2cm) superior to the EAM.
- Center image receptor to CR.
- Minimum SID is 40 inches (100 cm)
Collimation:
- Collimate to a field size of approximately 4 inches (10 cm) square.
Respiration:
- Suspend respiration during exposure.
Note: To obtain a sharply detailed image of the sella turcica, use of a small focal spot and close collimation is essential.
Radiographic Criteria:
Structure Shown:
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| Lateral Sella Tucica |
- Sella turcica, anterior and posterior clinoid processes, dorsum sallae, and clivus are shown.
Position:
- The sella turcica is visualized without rotation or tilt as indicated by the following.
- The sella turcica and clivus are demonstrated in profile.
- The anterior and posterior clinoids are superimposed.
- Rotation can be differentiated from tilt by the following:
- Rotation is evident by anterior and posterior separation of symmetric bilateral vertical structures such as the EAMs, mandibular rami, and clinoid processes.
- Tilt is evident by superior and inferior separation of symmetric horizontal structures such as the orbital roofs (plates) and lesser wings of the sphenoid.
Collimation and CR:
- Closely collimated image, with the sella turcica in the center.
Exposure Criteria:
- Density and contrast are sufficient to clearly visualize sella turcica and pituitary fossa.
- Sharp bony margins indicate no motion.
