Fluke Biomedical 57-402 - Manual (Page 13)

Filter Positioning (General)
Filter Positioning (General)
4
4-1
Section 4
Filter Positioning (General)
4.1 Filter Positioning (General)
This section contains a general description of filter positioning. Read it thoroughly before continuing.
When performing examinations with 72" FFD, a 14" x 36" cassette and preferably rare-earth intensifying
screens, proceed as described below. Sectional or multiple view radiographs on 14” x 17" or smaller films
may also be taken with the same filter orientation.
1. Position the patient, cassette, and x-ray tube as usual.
2. Attach the appropriate filter to the filter holder by the "Quick Stik” magnetic system. The magnetic
tape on the filters should align with the steel rails on the filter holder assembly. Adjust to the proper
height by sliding it up and down. The transparency of CLEAR-Pb filters allows the use or the
collimator light. However, shadow lines or the filter edges are clearly identifiable to aid in correct
placement. Either side of the filter can be outward.
3. Position the Breast Shields on top of the filter by attaching the steel side of the Breast Shields to the
magnetic mounting material at both sides of the filter.
Please Note: The Breast Shields may be used without a filter by simply attaching the magnetic side
of the Breast Shields to the filter holder rails.
Also, when using Build-Up Filters (57-430 and/or 57-434), you might prefer first attaching the Breast
Shields (magnetic side) to the filter holder rails, then positioning the AP/PA Filter over the Breast
Shields, and attaching the Build-Up Filter (metal side) over the AP/PA Filter.
4. Turn on the collimator light and position the filter so that the top edge of its shadow is at the level of
the external auditory meatus.
5. Position the Gonad Shield on the steel rails, using the shadow projected on the patient. Apply the
shamrock-shaped lead shield, with the single leaf pointing cephalad for male patients and caudad
for females.
The inferior aspect of the sacroiliac joints will be
blocked on females. This does not apply for use on
males.
6. When radiographing the sacroiliac region of an adult female, use the smaller-diameter Pediatric
Gonad Shield (57-444).
7. Double check the filter position before exposing the film.
NOTE