Radiographic Positioning: Radiographic Positioning of the Orbits

ORBITS

ROUTINE VIEWS:
Waters
PA
Lateral
Bilateral Rheses' Views

Waters
1. 8 x 10 film
2. Patient prone or upright
3. Patient positioned with chin on table, O.M.L. forms 37o angle with plan of film
4. Bucky
5. 40" SID
6. Central Ray: exits acanthion, mentomeatal is perpendicular to film
7. This view can demonstrate blow out fracture

PA
1. 8 x 10 film
2. Patient prone or upright
3. Position head so that O.M.L. and midsagital plane is perpendicular to table
4. Bucky
5. 40" SID
6. Central Ray: angled 25o caudal exits nasion

Lateral (of affected side)
1. 8 x 10 film
2. Patient in true lateral position, interpapillary line is perpendicular to film
3. Bucky
4. 40" SID
5. Central Ray: perpendicular to film enter bony lateral margin of outer canathus

Bilateral Rheses
1. 8 x 10 film
2. Patient's head rests in 3 point landing (chin, cheek and nose).
3. Patient is rotated 37o from true PA. Center to orbit down.
* Forehead should not touch table
4. Central ray exits at center of orbit nearest table
5. Bucky
6. 40" SID
7. When positioned correctly, optic foramen should be projected in lower, outer quadrant of orbit examined.

Rhese Suggestions
-If optic foramen is in rim of orbit, patient is positioned too lateral.

-If optic foramen is in middle of orbit, patient is positioned to P.A.