System information

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During fluoroscopy, center the test tool.
This process is normally easier if one of
the two pair of collimator blades is closed
to give a "slit image" with edges parallel
to one of the orthogonal channels.
Lock the fluoroscopic tower in place when
centering is complete. Tape the test tool
to the tabletop.
Place the collimator in the automatic mode
of operation.
If automatic mode is not
present, open collimator completely using
the manual mode.
Insert the brass radiopaque slides in their
channels of the test tool.
During fluoroscopy, adjust the slides
until their edges are just visible at the
edge of the fluoroscopic image.
Place a penny on the test tool within the
fluoroscopic field of view. Place a ready
pack film on ton of the test tool and
penny.
The penny is used to determine
orientation on the processed film.
Make a fluoroscopic exposure of approximately
100 mAs at 80 kVp.
Process the test film: verify sufficient
density on the film to image-the test tool
and radiation field.
If the image intensifier has more than one
field of view (eg. 9"-6"-4"), repeat steps
6-10 for each remaining field of view.
If the system is equipped with automatic
collimator sizing as a function of SID,
repeat steps 1-11 with the tower positioned
vertically at the maximum SID.
Spot Film Mode Alignment
13) Repeat steps l-4 above.
14) Place a loaded cassette in the spot film device.
15) Select the full size spot film mode.
16) With the collimator in the manual mode reduce
the size of the x-ray field until the edges of
the collimator blades are visible on the
fluoroscopic image.
17) Expose, process,
and verify density on the
spot film.
18) Repeat steps 14-17 for each available spot
film format.
For each format make enough
exposures to fill the image receptor (eg.
four exposures when the 4 on 1 mode is
selected).
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