Mandible and Orbits
Things to know for mandible 3 views AP, AP Axial, Axiolateral Page 404-406
Cassette 8x 10 lengthwise
AP Mandible Patient supine on table Midline with midline Tuck chin until the OML is perpendicular with IR No rotation or tilt
CR is perpendicular to junction of lips SID 40
What is seen Mandibular rami Lateral portion of body
AP Axial 8 x 10 lengthwise Shield Marker 80@16 Hold breath
Positioning Patient supine Midline to midline Tuck chin to OML is perpendicular No rotation or tilt
CR is angled 35-40 Degrees Caudad Entering at the Glabella SID 40
What to look for Condyloid processes Temporomandibular fossae
Axiolateral 8 x 10 Crosswise 75 @ 5 Shield Marker Hold breath Collimate to mandible
Positioning Rotate the head in a lateral position. ( sometime body has to roll) Side of interest on table. Extend neck so no imposition of spine
CR is angled 25 degrees cephalad Exit the region of interest Sid 40
Seen on Film Rami Body And mentum nearest the film
Orbits One View Rhese Method 8x10 Shield Marker 80 @ 18 Hold breath Collimate to area of interest
Positioning Patient prone on table Place patient’s chin, check and nose against table The mid sagittal plane froms a 53 degrees angle with IR Acanthiomeatal line perpendicualr to IR
CR perpendicular to the downside orbit
Seen on film Optic canal Optic foramen