ARCADIS Orbic Quick Guide
Examination Procedure
33
Collimator setting
For radiation protection reasons collimators
should be inserted. These can be set at the
C-arm system.
(1) Moves the iris diaphragm into/out of the
beam path
(2) Rotates the semitransparent diaphragm
(3) Moves the semitransparent diaphragm
into/out of the beam path
The iris diaphragm is a multileaf collimator
used for concentric collimation of the radia-
tion beam (4).
✧ Activate the iris diaphragm for small
objects, e.g. the wrists (1).
The semitransparent diaphragm acts as a den-
sity compensation. A diaphragm is moved
close to the extremity on both sides. Apart
from reducing radiation, this prevents overex-
posure at the edges of the extremities (5).
✧ Rotate the semitransparent diaphragm
corresponding to the position of the
object (2).
✧ Adapt the semitransparent diaphragm to
the size of the object (3).
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