IVIS
®
Lumina XRMS Series III Hardware Manual
Chapter 5 | X-ray Safety and Radiation Hazards
18
also a separate radiation enclosure under the imaging chamber and within the electronics tray. The
x-ray tube is contained within the electronics tray radiation enclosure.
It is important to not tamper with any of the steel shielding by either removing it or making any kind
of modification. The steel shield that is attached to the inside of the cast aluminum door is held on
by screws. It should be inspected frequently to make sure that it is not becoming detached. The
frequent inspection should be applied to any of the exterior mounted components such the excitation
filter wheel assembly.
IVIS Lumina XRMS Series III Control Panel
IVIS Lumina XRMS Series III is controlled primarily by software through a proprietary PerkinElmer
program called Living Image
®
software. For the X-ray modality some of the control has been shifted
to the main console electronics tray so as to conform to requirements for cabinet X-ray systems.
However, the controls and indicators on the main module are "enablers" only. The initiation and
termination of the X-ray imaging session is controlled from the computer through the Living Image
software.
X-rays cannot be generated unless the main console has been armed for X-ray mode with the
emergency off switch in the OFF position, the key switch is in the ON position, all safety interlocks
are working, and the yellow "ARM X-RAY" switch/indicator is activated. X-rays can be terminated
from the computer as an ordinary result of the programmed end of an imaging system or by stopping
the X-rays from the computer control panel. The X-rays can be stopped abnormally by hitting the
Emergency Stop switch, by turning OFF the Key switch, or by turning the door handle which
activated the primary interlock switch.
Finally, a redundant interlock, as prescribed by the United States FDA, completely disconnects
power to the X-ray source when the door is opened to a gap of 7 mm (0.28 inches). Because of the
"knife edge" design of the light and X-ray leakage seal, no radiation could escape through this gap.
Also, during X-ray operation, a solenoid-operated door lock prevents opening the door. This door
lock stays engaged for a few seconds after X-ray power has been turned off, and is used to ensure
that the radiation field has completely collapsed after the X-ray source voltage has been turn off.
Requirements for Turning on X-rays
The main ON/OFF enabling switch on the console control panel is the Keyed On/Off switch shown
in
. Without key enabling, no X-rays can be generated. The second action required is for
the yellow push button/indicator light "X-RAY ARMED" switch to be activated (see Figure 2).
These three conditions are necessary but not sufficient to generate X-rays. For X-ray imaging to
occur, the door must be closed and locked, thus engaging both the primary and redundant interlocks.
Finally, the X-rays must be activated by the computer control software as shown in Figure 3. In
normal operation, the yellow X-Ray Armed light will stay on while the user loads subjects into the
!
WARNING!
Do not modify this product in ANY way. Do not drill or modify the
shielding panels in ANY way. Do not operate the instrument or turn on the source
unless all shielding is in place and is in good repair. Do not attempt to access the
electronics compartment below the imaging chamber. Operation of the
instrument in a modified condition could result in exposure to X-rays. Exposure
to X-rays can cause serious bodily injury or death. Refer all servicing to
PerkinElmer Technical Support (see
NOTE:
This procedure assumes that the Emergency OFF switch is in its normal ON position.
