I-3. Beam on Controls and Indicators
Verify the availability of a positive indicator of
x-ray production when the x-ray
tube is energized, such
as:
(a) mA-Meter,
(b) X-ray "on" light, and/or
(c) Audible signal during or at end of exposure.
Test their function by making x-ray exposures.
Any of
these three warning systems which are provided should be
functioning.
The x-ray exposure
switch should be a
deadman type switch; the exposure must terminate when
pressure on the switch is released.
verified on a radiographic tube
This can only be
time is set to
if a l-2 second exposure
allow the operator time to release the
switch prior to termination of the exposure by the timer.
(When conducting this test
loading.) A deadman switch
is
avoid excessive
tube
not used nor required in
conjunction with rapid film changers; a separate switch
is provided to
stop
the exposure
series.
Unsteady
pressure on a
deadman
switch in this application could
prematurely terminate the exposure series
after
the
injection of contrast media.
If the exposure
switch is attached to a cord, the
cord or switch should be fastened to the control console
or be short enough to prevent
the radiographer from
extending any part of his/her body outside the protective
barrier.
If the exposure switch is a built-in type, the
control panel should
be installed so that the
radiographer is confined behind the protective barrier.
For a mobile/portable x-ray unit, the radiographer
must be able to stand at least 6 feet away from the x-ray
tube/beam during the
actual exposure
scattered radiation reaching him/her.
to minimize any
This normally is
accomplished by attaching the exposure switch to the unit
with at least a six foot long cord.
I-4. Shielding Devices
Lead or Lead equivalent protective aprons and gloves
of at least 0.25 mm Pb (Reference 12) should be readily
available for the protection
of occupationally exposed
personnel or parents of children in the procedure room
during exposures.
Appropriate gonadal shields should be
present without exception
for use with children and
patients under forty-five. At least one
apron and
gonadal
shields should be kept with each mobile unit.
Other appropriate shielding devices should be readily
available for use
in fluoroscopic
and
facilities.
angiographic
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentários a estes Manuais