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Pituitary fossa lateral (coned)
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Position as for the
lateral skull
Central ray directed
perpendicular to bucky
and centered at a point
2.5 cm above and 2.5
cm in front of the EAM
Collimate the beam
appropriately
SMV 1
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Facing the tube and slightly
away from the vertical
bucky, The neck is
extended as far as possible
to bring the vertex of the
skull in contact with the
bucky
Median plane
perpendicular & Base line
parallel to bucky
Centre in midline at the
level of EAMM,
perpendicular to bucky
SMV 2
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The patient’s
shoulders are raised
on pillows and the
neck hyper -extended
to bring the vertex of
the skull in contact
with the table.

Median plane
perpendicular & Base line
parallel to bucky
Centre in midline at the
level of EAMM,
perpendicular to bucky

Base of the skull (SubMentoVertical) - SMV
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If sitting, facing the tube and slightly away from
the vertical bucky. The neck is extended as far
as possible to bring the vertex of the skull in
contact with the bucky
If lying down, the patient’s shoulders are raised
on pillows and the neck hyper -extended to bring
the vertex of the skull in contact with the table.
Median plane perpendicular & Base line parallel
to bucky
Centre in midline at the level of EAMM,
perpendicular to bucky
SMV
•Heads of the
mandibular condyles
projected clear of the
petrous portions of the
temporal bones.
•The foraminae of the
middle cranial fossa are
seen symmetrically
either side of the
midline
•Sphenoid sinus in
midline
•Symmetrical petrous
pyramids.
Radiographic Appearance
Heads of the mandibular condyles
projected clear of the petrous portions of
the temporal bones.
 The foraminae of the middle cranial fossa
are seen symmetrically either side of the
midline
 Sphenoid sinus in midline
 Symmetrical petrous pyramids.
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