1. Occipito-Frontal 150 Forehead and nose rests against bucky.
EAMs are equidistant from the bucky.
Baseline and median sagittal plane are right angled to the bucky.
Direct central ray angled 150 caudally (from perpendicular) in midline to pass through the nasion

2. Occipito-Frontal 150 Forehead and nose rests against bucky
EAMs are equidistant from the bucky
Baseline and median sagittal plane are right angled to the bucky
Cassette ;- 24x30 cm lengthwise
Direct central ray angled 150 caudally (from perpendicular) in midline to pass through the nasion
70 kV, 40 mAs, 100 cm

3. PA 150
Criteria
As for PA
The petrous ridges lying at the lower third of the orbits (Just above the lower orbital margins)
Superior orbital fissures are demonstrated

4. Radiographic Appearance - Criteria
As for PA
Except
The petrous ridges lying at the lever third of the orbits
Superior orbital fissures are demonstrated

5. PA
PA 150