Radiographic Positioning: Radiographic Positioning of the Zygoma

ZYGOMA (ZYGOMATIC-ARCH)

ROUTINE VIEWS:
Waters
SMV
Bilateral Basiliar Obliques

Waters
1. 8 x 10 crosswise
2. Patient prone
3. Position head so that chin is resting on table. Be sure to extend chin enough to throw petrous ridges out of maxillary sinuses. OML for 37 angle with table.
4. Bucky
5. 40" grid
6. Central Ray: perpendicular to film, exits acanthion

Submentovertex (SMV)
1. 8 x 10 crosswise
2. Patient supine
3. Position patient's head so that Reid's baseline is perpendicular to film. I.O.M.L. parallel to film. May be necessary to build up shoulders to achieve this.
4. Bucky
5. 40" SID
6. Central Ray enters inferior to chin and exits at vertex

Bilateral Basiliar Obliques (Oblique Axial Position)
1. 8 x 10 crosswise
2. Patient supine
3. Patient's head is positioned so that the I.O.M.L. is parallel to film. Tilt head 15 degrees toward side to be examined.
4. Bucky
5. 40" SID
6. Central Ray: Skims parietal eminence and body of mandible
7. Both sides are done separately