Transcript Document

Lateral
Head in lateral
position, with the
affected side nearest the
bucky.
Mandible and the
occiput not
overshadowing the c.
spine.
Interorbital line
perpendicular to bucky.
Median sagittal plane
parallel to bucky.
Center at a point 2.5 cm
above the EAM
(midway between
glabella and EOP)
Lateral
Head in lateral position, with the affected
side nearest the bucky
 Mandible and the occiput not
overshadowing the c. spine
 Interorbital line perpendicular to bucky
 Median sagittal plane parallel to bucky
 Center at a point 2.5 cm above the EAM
(midway between glabella and EOP)

Radiographic appearance
Radioraphic Appearance - Criteria
Entire cranium without rotation or tilt,
including mandible & 1-3 cervical
vertebrae
 Superimposed orbital roofs & greater
wings of sphenoid
 Superimposed mastoid regions and
EAMM
 Sella tursica in profile
 Penial gland if calcified

Fronto-occpital 300 – Towne’s
In AP (supine) position.
Baseline (plane)
perpendicular to the
bucky.
Median sagittal plane
perpendicular to bucky.
Central ray angled 300
caudally directed in
midline through
midway between
EAMM
Cassette displaced
down appropriately
Fronto-occpital 300 – Towne’s
In AP (supine) position
 Baseline (plane) perpendicular to the
bucky
 Median sagittal plane perpendicular to
bucky
 Central ray angled 300 caudally directed in
midline through midway between EAMM
 Cassette displaced down appropriately

Towne’s view
Criteria
Dorsam sellae and
posterior clinoid
processes visible within
the foramen magnum.
Symmetric petrous
pyramids projected by
the side of the foramen
magnum.
Equal distance from
lateral border of the
skull to the lateral
margin of the foramen
magnum on both sides.
Radiographic appearance - Criteria
Dorsam sellae and posterior clinoid
processes visible within the foramen
magnum
 Symmetric petrous pyramids projected
by the side of the foramen magnum
 Equal distance from lateral border of
the skull to the lateral margin of the
foramen magnum on both sides.
