Fluke Biomedical 57-411 - Manual (Page 8)

Nuclear Associates
Operators Manual
1-4
If the steel rails on the filter holder intrude into the x-ray field of view, unscrew the rails and turn them
around (Figure 1-4). Since the screw holes in these rails are off center, turning the rails will set them ¾”
further apart.
If desired, the magnetic tape on some or all of the filters can be cut to match the new position of the
holder rails. Using a sharp knife, cut through the magnetic tape (on each side of the filter) in a line parallel
to, and 3/8” from, the inner edge. Remove this 3/8’’ strip, leaving a 5/8’’ tape strip along the outer edge of
the filter, which matches the new position of the filter holder rails.
The use of the filers and holder is not changed by the above procedure.
Figure 1-4.
Turning the steel rails increases spacing between them.
1.5 Long Leg Filter Mounting Instructions – Ceiling Mount
(Model 57-435)
This filter is mounted at the bottom of the beam-defining cone below ceiling mount x-ray tubes. The lower
beam opening of the cone is typically a 4" x 10" rectangle, and the location of the x-ray beam limits, at the
position of the patient, is known. The filter can be mounted by using double-sided tape, epoxy (or other
cement), screws or other convenient methods. The uniformly thick part of the filter attenuates the x-ray
beam from the patient’s feet to approximately the knees. The tapered part of the filter attenuates the
beam approximately 1/3 to 1/2 way up the thighs (See Figure 1-5).