MTR 221 ACS - MTR 221 ACS DHHS
MANUALE ISTRUZIONI / INSTRUCTION MANUAL
O
PTIONAL
I
TEMS
182
Model R 221 ACS - R 221 ACS DHHS
MT
R
2
21
ACS
-
MTR
2
21
AC
S DHH
S - Optio
nal Ite
m
s
Alignment of X-Ray Tube Focus and Collimator
Ralco guarantees the correct collimator functionality, format compliance and light/X-Ray field
alignment only if the mounting flange and the collimator have been installed exactly in the
centre of the X-Ray beam.
All Ralco collimators are aligned on our test bench utilizing specific references/values for our
X-Ray tube focus, detector and Source to Image Detector Distance (SID). The customer must
know and verify all known variables which may influence the X-Ray tube focus and collimator
alignment. These may include, the X-Ray tube focus position tolerance, distance from X-Ray
tube focus to collimator mounting plane, or the SID.
Alignment Device
This device is used to ensure the collimator
mounting flange is correctly aligned to the X-ray
beam. The X-ray tube manufacturer provides a
tolerance for the placement of X-ray tube focus.
Ralco recommends to use the Focal Alignment
Device (jig) to ensure the correct flange alignment
with the centre of the X-Ray beam, see
Fig. Focal
Alignment Device.
By making an exposure, it is
possible to verify the perpendicularity and
concentricity using fixed references on the X-Ray
image.
Once the mounting flange is aligned the collimator
light/X-ray field should also be aligned (within
specific tolerances).
Please consult the technical specifications of your X-
Ray tube to find the maximum tolerance for the
position of the focus. Should the use of an alignment
device not be possible, Ralco collimators allow for
the regulation of the light field.
C
AUTION
E
NSURE
THE
SCREW
HEAD
IS
INDEED
CORRECT
FOR
THE
FLANGE
SELECTED
.
I
T
IS
THE
RESPONSIBILITY
OF
THE
END
-
USER
TO
ENSURE
ALL
SAFETY
MEASURES
ARE
IMPLEMENTED
TO
ENSURE
THE
SCREWS
ARE
OPTIMALLY
TIGHTENED
INCLUDING
THE
USE
OF
APPROPRIATE
LOCKTITE
.
T
IGHTEN
THE
4
SCREWS
TO
THE
X-R
AY
T
UBE
HEAD
SECURELY
,
STRICTLY
ACCORDING
TO
THE
INSTRUCTIONS
OF
THE
X-R
AY
TUBE
MANUFACTURER
. D
O
NOT
E
XCEED
0.45 N
M
OF
FORCE
.
A - X-Ray Tube, B - Focal Adjustment Device
C - Mounting Flange, D - Screw, E - Washer
Fig. Focal Alignment Device
